The Experts below are selected from a list of 207 Experts worldwide ranked by ideXlab platform
Kamel Boukheddaden - One of the best experts on this subject based on the ideXlab platform.
-
Evidence of Photo-Thermal Effects on the First-Order Thermo-Induced Spin Transition of [{Fe(NCSe)(py)2}2(m-bpypz)] Spin-Crossover Material
MDPI AG, 2019Co-Authors: Kamel Boukheddaden, Houcem Fourati, Yogendra Singh, Guillaume ChastanetAbstract:We have investigated by means of optical microscopy and magnetic measurements the first-order thermal spin transition of the [{Fe(NCSe)(py)2}2(m-bpypz)] spin-crossover compound under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photo-heating effects on the thermally-induced hysteretic response of this spin-crossover material, thus causing the shift of the thermal hysteresis to lower temperature Regions. The experimental results are discussed in terms of the apparent crystal temperature and are analyzed theoretically using two evolution equations of motion, written on the high-spin (HS) fraction and heat balance between the crystal and the thermal bath. A very good qualitative agreement was found between experiment and theory in the stationary regime, explaining the experimental observations well and identifying the key factors governing these photo-thermal effects
-
spatiotemporal investigations on light driven high spin low spin interface dynamics in the thermal hysteresis Region of a spin crossover single crystal
Journal of Physical Chemistry C, 2018Co-Authors: Rachid Traiche, Yogendra Singh, Houcem Fourati, F Varret, Kamel BoukheddadenAbstract:We have investigated by optical microscopy the thermal spin transition of a single crystal of the spin-crossover compound [{Fe(NCSe)(py)2}2(m-bpypz)] under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photoheating on the thermally induced hysteretic response of the crystal, leading to the control of the transition temperature and the hysteresis width as a function of the light intensity. The inspections of the spatiotemporal behaviors of the spin-crossover transition, on heating and cooling, have also evidenced a significant dependence of the propagation speed of the high-spin–low-spin interface on the intensity of light. In particular, for strong shining intensities, a slowing of the interface speed at the transition is obtained, and an unprecedented dynamical two-step-like transition was observed in the thermal hysteresis. These results are analyzed theoretically using a spatiotemporal approach based on reaction–diffusion equations including th...
-
Spatiotemporal Investigations on Light-Driven High-Spin–Low-Spin Interface Dynamics in the Thermal Hysteresis Region of a Spin-Crossover Single Crystal
2018Co-Authors: Rachid Traiche, Yogendra Singh, Houcem Fourati, F Varret, Kamel BoukheddadenAbstract:We have investigated by optical microscopy the thermal spin transition of a single crystal of the spin-crossover compound [{Fe(NCSe)(py)2}2(m-bpypz)] under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photoheating on the thermally induced hysteretic response of the crystal, leading to the control of the transition temperature and the hysteresis width as a function of the light intensity. The inspections of the spatiotemporal behaviors of the spin-crossover transition, on heating and cooling, have also evidenced a significant dependence of the propagation speed of the high-spin–low-spin interface on the intensity of light. In particular, for strong shining intensities, a slowing of the interface speed at the transition is obtained, and an unprecedented dynamical two-step-like transition was observed in the thermal hysteresis. These results are analyzed theoretically using a spatiotemporal approach based on reaction–diffusion equations including the spin-state propagation and the heat transfer between the crystal and the thermal bath. The obtained results are in good agreement with experimental observations and lead to identification of the key factors governing the interface velocity and the thermal hysteresis behaviors under the light excitation in spin-crossover materials
-
spatiotemporal investigations on light driven high spin low spin interface dynamics in the thermal hysteresis Region of a spin crossover single crystal c
The Journal of Physical Chemistry, 2018Co-Authors: Rachid Traiche, Yogendra Singh, Houcem Fourati, F Varret, Kamel BoukheddadenAbstract:We have investigated by optical microscopy the thermal spin transition of a single crystal of the spin-crossover compound [{Fe(NCSe)(py)₂}₂(m-bpypz)] under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photoheating on the thermally induced hysteretic response of the crystal, leading to the control of the transition temperature and the hysteresis width as a function of the light intensity. The inspections of the spatiotemporal behaviors of the spin-crossover transition, on heating and cooling, have also evidenced a significant dependence of the propagation speed of the high-spin–low-spin interface on the intensity of light. In particular, for strong shining intensities, a slowing of the interface speed at the transition is obtained, and an unprecedented dynamical two-step-like transition was observed in the thermal hysteresis. These results are analyzed theoretically using a spatiotemporal approach based on reaction–diffusion equations including the spin-state propagation and the heat transfer between the crystal and the thermal bath. The obtained results are in good agreement with experimental observations and lead to identification of the key factors governing the interface velocity and the thermal hysteresis behaviors under the light excitation in spin-crossover materials.
Rachid Traiche - One of the best experts on this subject based on the ideXlab platform.
-
spatiotemporal investigations on light driven high spin low spin interface dynamics in the thermal hysteresis Region of a spin crossover single crystal
Journal of Physical Chemistry C, 2018Co-Authors: Rachid Traiche, Yogendra Singh, Houcem Fourati, F Varret, Kamel BoukheddadenAbstract:We have investigated by optical microscopy the thermal spin transition of a single crystal of the spin-crossover compound [{Fe(NCSe)(py)2}2(m-bpypz)] under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photoheating on the thermally induced hysteretic response of the crystal, leading to the control of the transition temperature and the hysteresis width as a function of the light intensity. The inspections of the spatiotemporal behaviors of the spin-crossover transition, on heating and cooling, have also evidenced a significant dependence of the propagation speed of the high-spin–low-spin interface on the intensity of light. In particular, for strong shining intensities, a slowing of the interface speed at the transition is obtained, and an unprecedented dynamical two-step-like transition was observed in the thermal hysteresis. These results are analyzed theoretically using a spatiotemporal approach based on reaction–diffusion equations including th...
-
Spatiotemporal Investigations on Light-Driven High-Spin–Low-Spin Interface Dynamics in the Thermal Hysteresis Region of a Spin-Crossover Single Crystal
2018Co-Authors: Rachid Traiche, Yogendra Singh, Houcem Fourati, F Varret, Kamel BoukheddadenAbstract:We have investigated by optical microscopy the thermal spin transition of a single crystal of the spin-crossover compound [{Fe(NCSe)(py)2}2(m-bpypz)] under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photoheating on the thermally induced hysteretic response of the crystal, leading to the control of the transition temperature and the hysteresis width as a function of the light intensity. The inspections of the spatiotemporal behaviors of the spin-crossover transition, on heating and cooling, have also evidenced a significant dependence of the propagation speed of the high-spin–low-spin interface on the intensity of light. In particular, for strong shining intensities, a slowing of the interface speed at the transition is obtained, and an unprecedented dynamical two-step-like transition was observed in the thermal hysteresis. These results are analyzed theoretically using a spatiotemporal approach based on reaction–diffusion equations including the spin-state propagation and the heat transfer between the crystal and the thermal bath. The obtained results are in good agreement with experimental observations and lead to identification of the key factors governing the interface velocity and the thermal hysteresis behaviors under the light excitation in spin-crossover materials
-
spatiotemporal investigations on light driven high spin low spin interface dynamics in the thermal hysteresis Region of a spin crossover single crystal c
The Journal of Physical Chemistry, 2018Co-Authors: Rachid Traiche, Yogendra Singh, Houcem Fourati, F Varret, Kamel BoukheddadenAbstract:We have investigated by optical microscopy the thermal spin transition of a single crystal of the spin-crossover compound [{Fe(NCSe)(py)₂}₂(m-bpypz)] under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photoheating on the thermally induced hysteretic response of the crystal, leading to the control of the transition temperature and the hysteresis width as a function of the light intensity. The inspections of the spatiotemporal behaviors of the spin-crossover transition, on heating and cooling, have also evidenced a significant dependence of the propagation speed of the high-spin–low-spin interface on the intensity of light. In particular, for strong shining intensities, a slowing of the interface speed at the transition is obtained, and an unprecedented dynamical two-step-like transition was observed in the thermal hysteresis. These results are analyzed theoretically using a spatiotemporal approach based on reaction–diffusion equations including the spin-state propagation and the heat transfer between the crystal and the thermal bath. The obtained results are in good agreement with experimental observations and lead to identification of the key factors governing the interface velocity and the thermal hysteresis behaviors under the light excitation in spin-crossover materials.
Houcem Fourati - One of the best experts on this subject based on the ideXlab platform.
-
Evidence of Photo-Thermal Effects on the First-Order Thermo-Induced Spin Transition of [{Fe(NCSe)(py)2}2(m-bpypz)] Spin-Crossover Material
MDPI AG, 2019Co-Authors: Kamel Boukheddaden, Houcem Fourati, Yogendra Singh, Guillaume ChastanetAbstract:We have investigated by means of optical microscopy and magnetic measurements the first-order thermal spin transition of the [{Fe(NCSe)(py)2}2(m-bpypz)] spin-crossover compound under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photo-heating effects on the thermally-induced hysteretic response of this spin-crossover material, thus causing the shift of the thermal hysteresis to lower temperature Regions. The experimental results are discussed in terms of the apparent crystal temperature and are analyzed theoretically using two evolution equations of motion, written on the high-spin (HS) fraction and heat balance between the crystal and the thermal bath. A very good qualitative agreement was found between experiment and theory in the stationary regime, explaining the experimental observations well and identifying the key factors governing these photo-thermal effects
-
spatiotemporal investigations on light driven high spin low spin interface dynamics in the thermal hysteresis Region of a spin crossover single crystal
Journal of Physical Chemistry C, 2018Co-Authors: Rachid Traiche, Yogendra Singh, Houcem Fourati, F Varret, Kamel BoukheddadenAbstract:We have investigated by optical microscopy the thermal spin transition of a single crystal of the spin-crossover compound [{Fe(NCSe)(py)2}2(m-bpypz)] under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photoheating on the thermally induced hysteretic response of the crystal, leading to the control of the transition temperature and the hysteresis width as a function of the light intensity. The inspections of the spatiotemporal behaviors of the spin-crossover transition, on heating and cooling, have also evidenced a significant dependence of the propagation speed of the high-spin–low-spin interface on the intensity of light. In particular, for strong shining intensities, a slowing of the interface speed at the transition is obtained, and an unprecedented dynamical two-step-like transition was observed in the thermal hysteresis. These results are analyzed theoretically using a spatiotemporal approach based on reaction–diffusion equations including th...
-
Spatiotemporal Investigations on Light-Driven High-Spin–Low-Spin Interface Dynamics in the Thermal Hysteresis Region of a Spin-Crossover Single Crystal
2018Co-Authors: Rachid Traiche, Yogendra Singh, Houcem Fourati, F Varret, Kamel BoukheddadenAbstract:We have investigated by optical microscopy the thermal spin transition of a single crystal of the spin-crossover compound [{Fe(NCSe)(py)2}2(m-bpypz)] under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photoheating on the thermally induced hysteretic response of the crystal, leading to the control of the transition temperature and the hysteresis width as a function of the light intensity. The inspections of the spatiotemporal behaviors of the spin-crossover transition, on heating and cooling, have also evidenced a significant dependence of the propagation speed of the high-spin–low-spin interface on the intensity of light. In particular, for strong shining intensities, a slowing of the interface speed at the transition is obtained, and an unprecedented dynamical two-step-like transition was observed in the thermal hysteresis. These results are analyzed theoretically using a spatiotemporal approach based on reaction–diffusion equations including the spin-state propagation and the heat transfer between the crystal and the thermal bath. The obtained results are in good agreement with experimental observations and lead to identification of the key factors governing the interface velocity and the thermal hysteresis behaviors under the light excitation in spin-crossover materials
-
spatiotemporal investigations on light driven high spin low spin interface dynamics in the thermal hysteresis Region of a spin crossover single crystal c
The Journal of Physical Chemistry, 2018Co-Authors: Rachid Traiche, Yogendra Singh, Houcem Fourati, F Varret, Kamel BoukheddadenAbstract:We have investigated by optical microscopy the thermal spin transition of a single crystal of the spin-crossover compound [{Fe(NCSe)(py)₂}₂(m-bpypz)] under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photoheating on the thermally induced hysteretic response of the crystal, leading to the control of the transition temperature and the hysteresis width as a function of the light intensity. The inspections of the spatiotemporal behaviors of the spin-crossover transition, on heating and cooling, have also evidenced a significant dependence of the propagation speed of the high-spin–low-spin interface on the intensity of light. In particular, for strong shining intensities, a slowing of the interface speed at the transition is obtained, and an unprecedented dynamical two-step-like transition was observed in the thermal hysteresis. These results are analyzed theoretically using a spatiotemporal approach based on reaction–diffusion equations including the spin-state propagation and the heat transfer between the crystal and the thermal bath. The obtained results are in good agreement with experimental observations and lead to identification of the key factors governing the interface velocity and the thermal hysteresis behaviors under the light excitation in spin-crossover materials.
Yogendra Singh - One of the best experts on this subject based on the ideXlab platform.
-
Evidence of Photo-Thermal Effects on the First-Order Thermo-Induced Spin Transition of [{Fe(NCSe)(py)2}2(m-bpypz)] Spin-Crossover Material
MDPI AG, 2019Co-Authors: Kamel Boukheddaden, Houcem Fourati, Yogendra Singh, Guillaume ChastanetAbstract:We have investigated by means of optical microscopy and magnetic measurements the first-order thermal spin transition of the [{Fe(NCSe)(py)2}2(m-bpypz)] spin-crossover compound under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photo-heating effects on the thermally-induced hysteretic response of this spin-crossover material, thus causing the shift of the thermal hysteresis to lower temperature Regions. The experimental results are discussed in terms of the apparent crystal temperature and are analyzed theoretically using two evolution equations of motion, written on the high-spin (HS) fraction and heat balance between the crystal and the thermal bath. A very good qualitative agreement was found between experiment and theory in the stationary regime, explaining the experimental observations well and identifying the key factors governing these photo-thermal effects
-
spatiotemporal investigations on light driven high spin low spin interface dynamics in the thermal hysteresis Region of a spin crossover single crystal
Journal of Physical Chemistry C, 2018Co-Authors: Rachid Traiche, Yogendra Singh, Houcem Fourati, F Varret, Kamel BoukheddadenAbstract:We have investigated by optical microscopy the thermal spin transition of a single crystal of the spin-crossover compound [{Fe(NCSe)(py)2}2(m-bpypz)] under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photoheating on the thermally induced hysteretic response of the crystal, leading to the control of the transition temperature and the hysteresis width as a function of the light intensity. The inspections of the spatiotemporal behaviors of the spin-crossover transition, on heating and cooling, have also evidenced a significant dependence of the propagation speed of the high-spin–low-spin interface on the intensity of light. In particular, for strong shining intensities, a slowing of the interface speed at the transition is obtained, and an unprecedented dynamical two-step-like transition was observed in the thermal hysteresis. These results are analyzed theoretically using a spatiotemporal approach based on reaction–diffusion equations including th...
-
Spatiotemporal Investigations on Light-Driven High-Spin–Low-Spin Interface Dynamics in the Thermal Hysteresis Region of a Spin-Crossover Single Crystal
2018Co-Authors: Rachid Traiche, Yogendra Singh, Houcem Fourati, F Varret, Kamel BoukheddadenAbstract:We have investigated by optical microscopy the thermal spin transition of a single crystal of the spin-crossover compound [{Fe(NCSe)(py)2}2(m-bpypz)] under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photoheating on the thermally induced hysteretic response of the crystal, leading to the control of the transition temperature and the hysteresis width as a function of the light intensity. The inspections of the spatiotemporal behaviors of the spin-crossover transition, on heating and cooling, have also evidenced a significant dependence of the propagation speed of the high-spin–low-spin interface on the intensity of light. In particular, for strong shining intensities, a slowing of the interface speed at the transition is obtained, and an unprecedented dynamical two-step-like transition was observed in the thermal hysteresis. These results are analyzed theoretically using a spatiotemporal approach based on reaction–diffusion equations including the spin-state propagation and the heat transfer between the crystal and the thermal bath. The obtained results are in good agreement with experimental observations and lead to identification of the key factors governing the interface velocity and the thermal hysteresis behaviors under the light excitation in spin-crossover materials
-
spatiotemporal investigations on light driven high spin low spin interface dynamics in the thermal hysteresis Region of a spin crossover single crystal c
The Journal of Physical Chemistry, 2018Co-Authors: Rachid Traiche, Yogendra Singh, Houcem Fourati, F Varret, Kamel BoukheddadenAbstract:We have investigated by optical microscopy the thermal spin transition of a single crystal of the spin-crossover compound [{Fe(NCSe)(py)₂}₂(m-bpypz)] under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photoheating on the thermally induced hysteretic response of the crystal, leading to the control of the transition temperature and the hysteresis width as a function of the light intensity. The inspections of the spatiotemporal behaviors of the spin-crossover transition, on heating and cooling, have also evidenced a significant dependence of the propagation speed of the high-spin–low-spin interface on the intensity of light. In particular, for strong shining intensities, a slowing of the interface speed at the transition is obtained, and an unprecedented dynamical two-step-like transition was observed in the thermal hysteresis. These results are analyzed theoretically using a spatiotemporal approach based on reaction–diffusion equations including the spin-state propagation and the heat transfer between the crystal and the thermal bath. The obtained results are in good agreement with experimental observations and lead to identification of the key factors governing the interface velocity and the thermal hysteresis behaviors under the light excitation in spin-crossover materials.
F Varret - One of the best experts on this subject based on the ideXlab platform.
-
spatiotemporal investigations on light driven high spin low spin interface dynamics in the thermal hysteresis Region of a spin crossover single crystal
Journal of Physical Chemistry C, 2018Co-Authors: Rachid Traiche, Yogendra Singh, Houcem Fourati, F Varret, Kamel BoukheddadenAbstract:We have investigated by optical microscopy the thermal spin transition of a single crystal of the spin-crossover compound [{Fe(NCSe)(py)2}2(m-bpypz)] under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photoheating on the thermally induced hysteretic response of the crystal, leading to the control of the transition temperature and the hysteresis width as a function of the light intensity. The inspections of the spatiotemporal behaviors of the spin-crossover transition, on heating and cooling, have also evidenced a significant dependence of the propagation speed of the high-spin–low-spin interface on the intensity of light. In particular, for strong shining intensities, a slowing of the interface speed at the transition is obtained, and an unprecedented dynamical two-step-like transition was observed in the thermal hysteresis. These results are analyzed theoretically using a spatiotemporal approach based on reaction–diffusion equations including th...
-
Spatiotemporal Investigations on Light-Driven High-Spin–Low-Spin Interface Dynamics in the Thermal Hysteresis Region of a Spin-Crossover Single Crystal
2018Co-Authors: Rachid Traiche, Yogendra Singh, Houcem Fourati, F Varret, Kamel BoukheddadenAbstract:We have investigated by optical microscopy the thermal spin transition of a single crystal of the spin-crossover compound [{Fe(NCSe)(py)2}2(m-bpypz)] under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photoheating on the thermally induced hysteretic response of the crystal, leading to the control of the transition temperature and the hysteresis width as a function of the light intensity. The inspections of the spatiotemporal behaviors of the spin-crossover transition, on heating and cooling, have also evidenced a significant dependence of the propagation speed of the high-spin–low-spin interface on the intensity of light. In particular, for strong shining intensities, a slowing of the interface speed at the transition is obtained, and an unprecedented dynamical two-step-like transition was observed in the thermal hysteresis. These results are analyzed theoretically using a spatiotemporal approach based on reaction–diffusion equations including the spin-state propagation and the heat transfer between the crystal and the thermal bath. The obtained results are in good agreement with experimental observations and lead to identification of the key factors governing the interface velocity and the thermal hysteresis behaviors under the light excitation in spin-crossover materials
-
spatiotemporal investigations on light driven high spin low spin interface dynamics in the thermal hysteresis Region of a spin crossover single crystal c
The Journal of Physical Chemistry, 2018Co-Authors: Rachid Traiche, Yogendra Singh, Houcem Fourati, F Varret, Kamel BoukheddadenAbstract:We have investigated by optical microscopy the thermal spin transition of a single crystal of the spin-crossover compound [{Fe(NCSe)(py)₂}₂(m-bpypz)] under various shining intensities, far from the light-induced spin-state Trapping Region. We found evidence of photoheating on the thermally induced hysteretic response of the crystal, leading to the control of the transition temperature and the hysteresis width as a function of the light intensity. The inspections of the spatiotemporal behaviors of the spin-crossover transition, on heating and cooling, have also evidenced a significant dependence of the propagation speed of the high-spin–low-spin interface on the intensity of light. In particular, for strong shining intensities, a slowing of the interface speed at the transition is obtained, and an unprecedented dynamical two-step-like transition was observed in the thermal hysteresis. These results are analyzed theoretically using a spatiotemporal approach based on reaction–diffusion equations including the spin-state propagation and the heat transfer between the crystal and the thermal bath. The obtained results are in good agreement with experimental observations and lead to identification of the key factors governing the interface velocity and the thermal hysteresis behaviors under the light excitation in spin-crossover materials.
