The Experts below are selected from a list of 32508 Experts worldwide ranked by ideXlab platform

Zhongxian Zhao - One of the best experts on this subject based on the ideXlab platform.

  • tunable Critical Temperature for superconductivity in fese thin films by pulsed laser deposition
    Scientific Reports, 2018
    Co-Authors: Zhongpei Feng, Jie Yuan, Zefeng Lin, Xingyu Jiang, Yulong Huang, Beiyi Zhu, Xiaoli Dong, Fang Zhou, Huabing Wang, Zhongxian Zhao
    Abstract:

    Stabilized FeSe thin films in ambient pressure with tunable Superconducting Critical Temperature would be a promising candidate for Superconducting electronic devices. By carefully controlling the depositions on twelve kinds of substrates using a pulsed laser deposition technique single crystalline FeSe thin films were fabricated. The high quality of the thin films was confirmed by X-ray diffraction with a full width at half maximum of 0.515° in the rocking curve and clear four-fold symmetry in φ-scan. The films have a maximum T c ~ 15 K on the CaF2 substrate and were stable in ambient conditions air for more than half a year. Slightly tuning the stoichiometry of the FeSe targets, the Superconducting Critical Temperature becomes adjustable below 15 K with quite narrow transition width less than 2 K. These FeSe thin films deposited on different substrates are optimized respectively. The Tc of these optimized films show a relation with the out-of-plane (c-axis) lattice parameter of the FeSe films.

  • superconductivity and phase diagram in iron based arsenic oxides refeaso1 δ re rare earth metal without fluorine doping
    EPL, 2008
    Co-Authors: Xiaoli Dong, Fang Zhou, Jie Yang, Xiaoli Shen, Wei Lu, Wei Yi, Zhengcai Li, Zhongxian Zhao
    Abstract:

    Here we report a new class of superconductors prepared by high-pressure synthesis in the quaternary family ReFeAsO1−δ (Re=Sm, Nd, Pr, Ce, La) without fluorine doping. The onset Superconducting Critical Temperature (Tc) in these compounds increases with the reduction of the Re atom size, and the highest Tc obtained so far is 55 K in SmFeAsO1−δ. For the NdFeAsO1−δ compound with different oxygen concentration a dome-shaped phase diagram was found.

  • superconductivity and phase diagram in the iron based arsenic oxides refeaso1 delta re rare earth metal without f doping
    arXiv: Superconductivity, 2008
    Co-Authors: Zhian Ren, Xiaoli Dong, Fang Zhou, G C Che, Jie Yang, Xiaoli Shen, Liling Sun, Zhongxian Zhao
    Abstract:

    Here we report a new class of superconductors prepared by high pressure synthesis in the quaternary family ReFeAsO1-delta (Re = Sm, Nd, Pr, Ce, La) without fluorine doping. The onset Superconducting Critical Temperature (Tc) in these compounds increases with the reduction of Re atom size, and the highest Tc obtained so far is 55 K in SmFeAsO1-delta. For the NdFeAsO1-delta system with different oxygen concentration a dome-shaped phase diagram was found.

K Senapati - One of the best experts on this subject based on the ideXlab platform.

  • magnetic field tunable Superconducting transition in nb co py nb exchange spring multilayers
    arXiv: Superconductivity, 2020
    Co-Authors: Ekta Bhatia, J M Devinestoneman, Z H Barber, J W A Robinson, K Senapati
    Abstract:

    Over the last decade it has been shown that magnetic non-collinearity at a s-wave superconductor/ferromagnet interface is a key ingredient for spin-singlet to spin-triplet pair conversion. This has been verified in several synthetic non-collinear magnetic structures. A magnetically soft and hard ferromagnetic layer combination in a bi-layer structure can function as a field tunable non-collinear magnetic structure which may offer magnetic-field tuneability of singlet-to-triplet pair conversion. From magnetization measurements of Nb/Co/Py/Nb multilayers we demonstrate a reversible enhancement of the Superconducting Critical Temperature of 400 mK by measuring Tc with and without a non-collinear magnetic structure between Co and Py. The sensitivity of Tc in these structures offers the potential for realizing magnetic field tunable Josephson junctions in which pair conversion and Josephson Critical currents are controllable using modest magnetic fields.

  • magnetic field tunable Superconducting transition in nb co py nb exchange spring multilayers
    Applied Physics Letters, 2020
    Co-Authors: Ekta Bhatia, J M Devinestoneman, Z H Barber, J W A Robinson, K Senapati
    Abstract:

    Over the last decade, it has been shown that magnetic non-collinearity at an s-wave superconductor/ferromagnet interface is a key ingredient for spin-singlet to spin-triplet pair conversion. This has been verified in several synthetic non-collinear magnetic structures. A magnetically soft and hard ferromagnetic layer combination in a bilayer structure can function as a field tunable non-collinear magnetic structure, which may offer magnetic field tunability of singlet-to-triplet pair conversion. From magnetization measurements of Nb/Co/Py/Nb multilayers, we demonstrate a reversible enhancement of the Superconducting Critical Temperature of 400 mK by measuring T c with and without a non-collinear magnetic structure between Co and Py. The sensitivity of T c in these structures offers the potential for realizing magnetic field tunable Josephson junctions in which pair conversion and Josephson Critical currents are controllable using modest magnetic fields.

Xiaoli Dong - One of the best experts on this subject based on the ideXlab platform.

  • tunable Critical Temperature for superconductivity in fese thin films by pulsed laser deposition
    Scientific Reports, 2018
    Co-Authors: Zhongpei Feng, Jie Yuan, Zefeng Lin, Xingyu Jiang, Yulong Huang, Beiyi Zhu, Xiaoli Dong, Fang Zhou, Huabing Wang, Zhongxian Zhao
    Abstract:

    Stabilized FeSe thin films in ambient pressure with tunable Superconducting Critical Temperature would be a promising candidate for Superconducting electronic devices. By carefully controlling the depositions on twelve kinds of substrates using a pulsed laser deposition technique single crystalline FeSe thin films were fabricated. The high quality of the thin films was confirmed by X-ray diffraction with a full width at half maximum of 0.515° in the rocking curve and clear four-fold symmetry in φ-scan. The films have a maximum T c ~ 15 K on the CaF2 substrate and were stable in ambient conditions air for more than half a year. Slightly tuning the stoichiometry of the FeSe targets, the Superconducting Critical Temperature becomes adjustable below 15 K with quite narrow transition width less than 2 K. These FeSe thin films deposited on different substrates are optimized respectively. The Tc of these optimized films show a relation with the out-of-plane (c-axis) lattice parameter of the FeSe films.

  • superconductivity and phase diagram in iron based arsenic oxides refeaso1 δ re rare earth metal without fluorine doping
    EPL, 2008
    Co-Authors: Xiaoli Dong, Fang Zhou, Jie Yang, Xiaoli Shen, Wei Lu, Wei Yi, Zhengcai Li, Zhongxian Zhao
    Abstract:

    Here we report a new class of superconductors prepared by high-pressure synthesis in the quaternary family ReFeAsO1−δ (Re=Sm, Nd, Pr, Ce, La) without fluorine doping. The onset Superconducting Critical Temperature (Tc) in these compounds increases with the reduction of the Re atom size, and the highest Tc obtained so far is 55 K in SmFeAsO1−δ. For the NdFeAsO1−δ compound with different oxygen concentration a dome-shaped phase diagram was found.

  • superconductivity and phase diagram in the iron based arsenic oxides refeaso1 delta re rare earth metal without f doping
    arXiv: Superconductivity, 2008
    Co-Authors: Zhian Ren, Xiaoli Dong, Fang Zhou, G C Che, Jie Yang, Xiaoli Shen, Liling Sun, Zhongxian Zhao
    Abstract:

    Here we report a new class of superconductors prepared by high pressure synthesis in the quaternary family ReFeAsO1-delta (Re = Sm, Nd, Pr, Ce, La) without fluorine doping. The onset Superconducting Critical Temperature (Tc) in these compounds increases with the reduction of Re atom size, and the highest Tc obtained so far is 55 K in SmFeAsO1-delta. For the NdFeAsO1-delta system with different oxygen concentration a dome-shaped phase diagram was found.

Ekta Bhatia - One of the best experts on this subject based on the ideXlab platform.

  • magnetic field tunable Superconducting transition in nb co py nb exchange spring multilayers
    arXiv: Superconductivity, 2020
    Co-Authors: Ekta Bhatia, J M Devinestoneman, Z H Barber, J W A Robinson, K Senapati
    Abstract:

    Over the last decade it has been shown that magnetic non-collinearity at a s-wave superconductor/ferromagnet interface is a key ingredient for spin-singlet to spin-triplet pair conversion. This has been verified in several synthetic non-collinear magnetic structures. A magnetically soft and hard ferromagnetic layer combination in a bi-layer structure can function as a field tunable non-collinear magnetic structure which may offer magnetic-field tuneability of singlet-to-triplet pair conversion. From magnetization measurements of Nb/Co/Py/Nb multilayers we demonstrate a reversible enhancement of the Superconducting Critical Temperature of 400 mK by measuring Tc with and without a non-collinear magnetic structure between Co and Py. The sensitivity of Tc in these structures offers the potential for realizing magnetic field tunable Josephson junctions in which pair conversion and Josephson Critical currents are controllable using modest magnetic fields.

  • magnetic field tunable Superconducting transition in nb co py nb exchange spring multilayers
    Applied Physics Letters, 2020
    Co-Authors: Ekta Bhatia, J M Devinestoneman, Z H Barber, J W A Robinson, K Senapati
    Abstract:

    Over the last decade, it has been shown that magnetic non-collinearity at an s-wave superconductor/ferromagnet interface is a key ingredient for spin-singlet to spin-triplet pair conversion. This has been verified in several synthetic non-collinear magnetic structures. A magnetically soft and hard ferromagnetic layer combination in a bilayer structure can function as a field tunable non-collinear magnetic structure, which may offer magnetic field tunability of singlet-to-triplet pair conversion. From magnetization measurements of Nb/Co/Py/Nb multilayers, we demonstrate a reversible enhancement of the Superconducting Critical Temperature of 400 mK by measuring T c with and without a non-collinear magnetic structure between Co and Py. The sensitivity of T c in these structures offers the potential for realizing magnetic field tunable Josephson junctions in which pair conversion and Josephson Critical currents are controllable using modest magnetic fields.

N Haberkorn - One of the best experts on this subject based on the ideXlab platform.

  • Critical current densities and flux creep rates in near optimally doped bafe2 xruxas2 x 0 7 single crystals
    Solid State Communications, 2016
    Co-Authors: N Haberkorn
    Abstract:

    Abstract We present an investigation of the Critical current densities J c and flux creep rates in a near optimally doped BaFe 2− x Ru x As 2 ( x ≈0.7) single crystal by (measuring magnetization). The Superconducting Critical Temperature is 18 K. The in-field dependences of the Critical current density J c are due to a mixed pinning scenario produced mainly by large precipitates and a less significant contribution of random disorder. Furthermore, a Maley analysis in the regime dominated by strong pinning centers ( μ 0 H =0.1 T) is well described through a glassy exponent μ =1.9 and a collective pinning energy ( U 0 ) smaller than 100 K.

  • upper Critical magnetic field and vortex free state in very thin epitaxial δ mon films grown by polymer assisted deposition
    Superconductor Science and Technology, 2013
    Co-Authors: N Haberkorn, Q X Jia, T M Mccleskey, Anthony K Burrell, Yingshan Zhang, Jeehoon Kim, R F Depaula, T Tajima, L Civale
    Abstract:

    We measured the thickness dependence of the Superconducting properties in epitaxial δ-MoN thin films grown on α-Al2O3(001) substrates by polymer-assisted deposition. Our results indicate that the Superconducting properties such as the upper Critical field (μ0Hc2 ≈ 10 T) and the Superconducting Critical Temperature (Tc = 12.5 K) are thickness independent for films thicker than ~36 nm. By measuring the Critical current density (Jc) in the vortex-free state, which coincides with the depairing current density (J0), we estimate that films thicker than ~36 nm have a coherence length ξ(0) = 5.8 ± 0.2 nm and penetration depth λ(0) = 420 ± 50 nm. We found that it is possible to enhance the Hc2(0) values to close to 10 T without any appreciable reduction in Tc.