The Experts below are selected from a list of 2409 Experts worldwide ranked by ideXlab platform
Janssens Ewald - One of the best experts on this subject based on the ideXlab platform.
-
Investigation on the Chromium doping effect on small cobalt clusters Con+ (n = 3–5) by IR spectroscopy and DFT calculations
2018Co-Authors: Jia Mei-ye, Van Der Tol Johan, Nhân Lê Pham, Li Yejun, Chernyy Valeriy, Bakker Joost, Nguyen Minh, Janssens EwaldAbstract:Investigation on the Chromium doping effect on small cobalt clusters Con+ (n = 3–5) by IR spectroscopy and DFT calculations Mei-Ye Jia1, Johan van der Tol1, Nhân Lê Pham4, Yejun Li1,2, Valeriy Chernyy3, Joost M. Bakker3, Minh Tho Nguyen4, and Ewald Janssens*1 1 Laboratory of Solid State Physics and Magnetism, KU Leuven, Leuven, Belgium 2 Hunan Key Laboratory of Super Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha, P. R. China 3 Radboud University, FELIX Laboratory, Nijmegen, The Netherlands 4 Department of Chemistry, KU Leuven, Celestijnenlaan 200 F, B-3001 Leuven, Belgium The magnetism in transition metals is one of the most intensively studied properties of bulk matter. A better understanding of magnetism, especially in small particles, is crucial not only for basic physics but also for both the recording industry and the nanotechnologies. (1–2) The magnetism of small cobalt clusters, aggregates of a few cobalt Atoms, is of great scientific interest to understand how magnetic properties evolve from single Atoms to bulk materials. Furthermore, doped cobalt clusters are of interest to investigate how a single dopant Atom may modify the ferromagnetic interaction in cobalt clusters. In this work, the geometric and electronic structures of small cobalt clusters Con+ (n = 3–5) and single Chromium Atom doped cobalt clusters Con-1Cr+ are investigated by comparing infrared multiple photon dissociation (IR-MPD) spectra with density functional theory (DFT) calculations, aiming to explore the doping effect of Chromium upon cobalt clusters. Figure 1 the mass spectra of Con+ and Con-1Cr+ (n = 3–5) clusters. 1. J. Graciani, K. Mudiyanselage, F. Xu, A. E. Baber, J. Evans, S. D. Senanayake, D. J. Stacchiola, P. Liu, J. Hrbek, J. F. Sanz and J. A. Rodriguez, Science, 2014, 345, 546–550. 2. A. C. Cardiel, M. C. Benson, L. M. Bishop, K. M. Louis, J. C. Yeager, Y. Tan and R. J. Hamers, ACS Nano, 2012, 6, 310–318.status: publishe
-
Investigation on the Chromium doping effect on small cobalt clusters Con+ (n = 3–5) by IR spectroscopy and DFT calculations
2018Co-Authors: Jia Mei-ye, Van Der Tol Johan, Nhân Lê Pham, Li Yejun, Chernyy Valeriy, Bakker Joost, Nguyen Minh, Janssens EwaldAbstract:The magnetism in transition metals is one of the most intensively studied properties of bulk matter. A better understanding of magnetism, especially in small particles, is crucial not only for basic physics but also for both the recording industry and the nanotechnologies. (1–2) The magnetism of small cobalt clusters, aggregates of a few cobalt Atoms, is of great scientific interest to understand how magnetic properties evolve from single Atoms to bulk materials. Furthermore, doped cobalt clusters are of interest to investigate how a single dopant Atom may modify the ferromagnetic interaction in cobalt clusters. In this work, the geometric and electronic structures of small cobalt clusters Con+ (n = 3–5) and single Chromium Atom doped cobalt clusters Con-1Cr+ are investigated by comparing infrared multiple photon dissociation (IR-MPD) spectra with density functional theory (DFT) calculations, aiming to explore the doping effect of Chromium upon cobalt clusters.status: publishe
-
Structures and magnetic properties of small Co-n(+) and Con-1Cr+ (n=3-5)clusters
'IOP Publishing', 2018Co-Authors: Jia Meiye, Van Der Tol Johan, Li Yejun, Chernyy Valeriy, Bakker, Joost M, Le, Nhan Pham, Minh, Tho Nguyen, Janssens EwaldAbstract:Small cobalt clusters [Formula: see text] and their single Chromium Atom doped counterparts Co n-1Cr+ (n = 3-5) were studied mass spectrometrically by measuring the infrared multiple photon dissociation (IRMPD) spectra of the corresponding argon tagged complexes. The geometric and electronic structures of the [Formula: see text] and Co n-1Cr+ (n = 3-5) clusters as well as their Ar complexes were optimized by density functional theory (DFT) calculations. The obtained lowest energy structures were confirmed by comparing the IRMPD spectra of [Formula: see text] and [Formula: see text] (n = 3-5, m = 3 and 4) with the corresponding calculated IR spectra. The calculations reveal that the doped Co n-1Cr+ clusters retain the geometric structures of the most stable [Formula: see text] clusters. However, the coupling of the local magnetic moments within the clusters is altered in a size-dependent way: the Cr Atom is ferromagnetically coupled in Co2Cr+ and Co3Cr+, while it is antiferromagnetically coupled in Co4Cr+.status: publishe
Zhang Wentao - One of the best experts on this subject based on the ideXlab platform.
-
Chromium Atom deposition in elliptical standing wave filed
Acta Physica Sinica, 2011Co-Authors: Zhang Wentao, Zhu Baohua, Huang Jing, Xiong XianmingAbstract:Direct-write Atom lithography is a new technique in which resonant light is used to pattern an Atomic beam and the nanostructures are formed when the Atoms deposit on a substrate. The motorial characteristics of Chromium Atoms in an elliptical standing wave filed are discussed, and the simulation results are given with different deflective angles of elliptical standing wave. The full width at half maximum (FWHM) is 3.2 nm and the contrast is 36 ∶1 with a deflective angle of 0°. The FWHM is 6.5nm and the contrast is 24 ∶1 with a deflective angel of 15°, but when the deflective angle reaches 30°, the stripe splits and two-peak configuration is formed.
-
a laser cooled Chromium Atom beam for nanolithography
Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms, 2007Co-Authors: Zhang Wentao, Li Tongbao, Zhang BaowuAbstract:Abstract We have used a high collimated neutral Chromium Atomic beam to write periodic nanometer-scale structures by depositing an Atomic beam of 52 Cr through an off-resonant laser standing wave with the wavelength of 425.55 nm onto a silicon substrate. The resulting nanolines exhibit a period of 215 ± 3 nm with a height of 1 nm, which was half the wavelength of standing wave used to write the grating.
-
doppler laser cooling of Chromium Atom beam
Journal of Guilin University of Electronic Technology, 2006Co-Authors: Zhang Wentao, Li TongbaoAbstract:We have laser collimated a Chromium Atomic beam in one dimension using the Doppler laser cooling technique.The experimental setup was given,in which,the laser was tuned 5MHz below the Chromium transition by an AOM,the laser was generated by a frequency-doubled single-mode Ti:Sapphire laser.We also modulated the results of cooling.By calculating,the angular divergence of the Atomic beam was reduced from 4.5mrad to 0.9mrad.
Li Yejun - One of the best experts on this subject based on the ideXlab platform.
-
Investigation on the Chromium doping effect on small cobalt clusters Con+ (n = 3–5) by IR spectroscopy and DFT calculations
2018Co-Authors: Jia Mei-ye, Van Der Tol Johan, Nhân Lê Pham, Li Yejun, Chernyy Valeriy, Bakker Joost, Nguyen Minh, Janssens EwaldAbstract:Investigation on the Chromium doping effect on small cobalt clusters Con+ (n = 3–5) by IR spectroscopy and DFT calculations Mei-Ye Jia1, Johan van der Tol1, Nhân Lê Pham4, Yejun Li1,2, Valeriy Chernyy3, Joost M. Bakker3, Minh Tho Nguyen4, and Ewald Janssens*1 1 Laboratory of Solid State Physics and Magnetism, KU Leuven, Leuven, Belgium 2 Hunan Key Laboratory of Super Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha, P. R. China 3 Radboud University, FELIX Laboratory, Nijmegen, The Netherlands 4 Department of Chemistry, KU Leuven, Celestijnenlaan 200 F, B-3001 Leuven, Belgium The magnetism in transition metals is one of the most intensively studied properties of bulk matter. A better understanding of magnetism, especially in small particles, is crucial not only for basic physics but also for both the recording industry and the nanotechnologies. (1–2) The magnetism of small cobalt clusters, aggregates of a few cobalt Atoms, is of great scientific interest to understand how magnetic properties evolve from single Atoms to bulk materials. Furthermore, doped cobalt clusters are of interest to investigate how a single dopant Atom may modify the ferromagnetic interaction in cobalt clusters. In this work, the geometric and electronic structures of small cobalt clusters Con+ (n = 3–5) and single Chromium Atom doped cobalt clusters Con-1Cr+ are investigated by comparing infrared multiple photon dissociation (IR-MPD) spectra with density functional theory (DFT) calculations, aiming to explore the doping effect of Chromium upon cobalt clusters. Figure 1 the mass spectra of Con+ and Con-1Cr+ (n = 3–5) clusters. 1. J. Graciani, K. Mudiyanselage, F. Xu, A. E. Baber, J. Evans, S. D. Senanayake, D. J. Stacchiola, P. Liu, J. Hrbek, J. F. Sanz and J. A. Rodriguez, Science, 2014, 345, 546–550. 2. A. C. Cardiel, M. C. Benson, L. M. Bishop, K. M. Louis, J. C. Yeager, Y. Tan and R. J. Hamers, ACS Nano, 2012, 6, 310–318.status: publishe
-
Investigation on the Chromium doping effect on small cobalt clusters Con+ (n = 3–5) by IR spectroscopy and DFT calculations
2018Co-Authors: Jia Mei-ye, Van Der Tol Johan, Nhân Lê Pham, Li Yejun, Chernyy Valeriy, Bakker Joost, Nguyen Minh, Janssens EwaldAbstract:The magnetism in transition metals is one of the most intensively studied properties of bulk matter. A better understanding of magnetism, especially in small particles, is crucial not only for basic physics but also for both the recording industry and the nanotechnologies. (1–2) The magnetism of small cobalt clusters, aggregates of a few cobalt Atoms, is of great scientific interest to understand how magnetic properties evolve from single Atoms to bulk materials. Furthermore, doped cobalt clusters are of interest to investigate how a single dopant Atom may modify the ferromagnetic interaction in cobalt clusters. In this work, the geometric and electronic structures of small cobalt clusters Con+ (n = 3–5) and single Chromium Atom doped cobalt clusters Con-1Cr+ are investigated by comparing infrared multiple photon dissociation (IR-MPD) spectra with density functional theory (DFT) calculations, aiming to explore the doping effect of Chromium upon cobalt clusters.status: publishe
-
Structures and magnetic properties of small Co-n(+) and Con-1Cr+ (n=3-5)clusters
'IOP Publishing', 2018Co-Authors: Jia Meiye, Van Der Tol Johan, Li Yejun, Chernyy Valeriy, Bakker, Joost M, Le, Nhan Pham, Minh, Tho Nguyen, Janssens EwaldAbstract:Small cobalt clusters [Formula: see text] and their single Chromium Atom doped counterparts Co n-1Cr+ (n = 3-5) were studied mass spectrometrically by measuring the infrared multiple photon dissociation (IRMPD) spectra of the corresponding argon tagged complexes. The geometric and electronic structures of the [Formula: see text] and Co n-1Cr+ (n = 3-5) clusters as well as their Ar complexes were optimized by density functional theory (DFT) calculations. The obtained lowest energy structures were confirmed by comparing the IRMPD spectra of [Formula: see text] and [Formula: see text] (n = 3-5, m = 3 and 4) with the corresponding calculated IR spectra. The calculations reveal that the doped Co n-1Cr+ clusters retain the geometric structures of the most stable [Formula: see text] clusters. However, the coupling of the local magnetic moments within the clusters is altered in a size-dependent way: the Cr Atom is ferromagnetically coupled in Co2Cr+ and Co3Cr+, while it is antiferromagnetically coupled in Co4Cr+.status: publishe
Chernyy Valeriy - One of the best experts on this subject based on the ideXlab platform.
-
Investigation on the Chromium doping effect on small cobalt clusters Con+ (n = 3–5) by IR spectroscopy and DFT calculations
2018Co-Authors: Jia Mei-ye, Van Der Tol Johan, Nhân Lê Pham, Li Yejun, Chernyy Valeriy, Bakker Joost, Nguyen Minh, Janssens EwaldAbstract:Investigation on the Chromium doping effect on small cobalt clusters Con+ (n = 3–5) by IR spectroscopy and DFT calculations Mei-Ye Jia1, Johan van der Tol1, Nhân Lê Pham4, Yejun Li1,2, Valeriy Chernyy3, Joost M. Bakker3, Minh Tho Nguyen4, and Ewald Janssens*1 1 Laboratory of Solid State Physics and Magnetism, KU Leuven, Leuven, Belgium 2 Hunan Key Laboratory of Super Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha, P. R. China 3 Radboud University, FELIX Laboratory, Nijmegen, The Netherlands 4 Department of Chemistry, KU Leuven, Celestijnenlaan 200 F, B-3001 Leuven, Belgium The magnetism in transition metals is one of the most intensively studied properties of bulk matter. A better understanding of magnetism, especially in small particles, is crucial not only for basic physics but also for both the recording industry and the nanotechnologies. (1–2) The magnetism of small cobalt clusters, aggregates of a few cobalt Atoms, is of great scientific interest to understand how magnetic properties evolve from single Atoms to bulk materials. Furthermore, doped cobalt clusters are of interest to investigate how a single dopant Atom may modify the ferromagnetic interaction in cobalt clusters. In this work, the geometric and electronic structures of small cobalt clusters Con+ (n = 3–5) and single Chromium Atom doped cobalt clusters Con-1Cr+ are investigated by comparing infrared multiple photon dissociation (IR-MPD) spectra with density functional theory (DFT) calculations, aiming to explore the doping effect of Chromium upon cobalt clusters. Figure 1 the mass spectra of Con+ and Con-1Cr+ (n = 3–5) clusters. 1. J. Graciani, K. Mudiyanselage, F. Xu, A. E. Baber, J. Evans, S. D. Senanayake, D. J. Stacchiola, P. Liu, J. Hrbek, J. F. Sanz and J. A. Rodriguez, Science, 2014, 345, 546–550. 2. A. C. Cardiel, M. C. Benson, L. M. Bishop, K. M. Louis, J. C. Yeager, Y. Tan and R. J. Hamers, ACS Nano, 2012, 6, 310–318.status: publishe
-
Investigation on the Chromium doping effect on small cobalt clusters Con+ (n = 3–5) by IR spectroscopy and DFT calculations
2018Co-Authors: Jia Mei-ye, Van Der Tol Johan, Nhân Lê Pham, Li Yejun, Chernyy Valeriy, Bakker Joost, Nguyen Minh, Janssens EwaldAbstract:The magnetism in transition metals is one of the most intensively studied properties of bulk matter. A better understanding of magnetism, especially in small particles, is crucial not only for basic physics but also for both the recording industry and the nanotechnologies. (1–2) The magnetism of small cobalt clusters, aggregates of a few cobalt Atoms, is of great scientific interest to understand how magnetic properties evolve from single Atoms to bulk materials. Furthermore, doped cobalt clusters are of interest to investigate how a single dopant Atom may modify the ferromagnetic interaction in cobalt clusters. In this work, the geometric and electronic structures of small cobalt clusters Con+ (n = 3–5) and single Chromium Atom doped cobalt clusters Con-1Cr+ are investigated by comparing infrared multiple photon dissociation (IR-MPD) spectra with density functional theory (DFT) calculations, aiming to explore the doping effect of Chromium upon cobalt clusters.status: publishe
-
Structures and magnetic properties of small Co-n(+) and Con-1Cr+ (n=3-5)clusters
'IOP Publishing', 2018Co-Authors: Jia Meiye, Van Der Tol Johan, Li Yejun, Chernyy Valeriy, Bakker, Joost M, Le, Nhan Pham, Minh, Tho Nguyen, Janssens EwaldAbstract:Small cobalt clusters [Formula: see text] and their single Chromium Atom doped counterparts Co n-1Cr+ (n = 3-5) were studied mass spectrometrically by measuring the infrared multiple photon dissociation (IRMPD) spectra of the corresponding argon tagged complexes. The geometric and electronic structures of the [Formula: see text] and Co n-1Cr+ (n = 3-5) clusters as well as their Ar complexes were optimized by density functional theory (DFT) calculations. The obtained lowest energy structures were confirmed by comparing the IRMPD spectra of [Formula: see text] and [Formula: see text] (n = 3-5, m = 3 and 4) with the corresponding calculated IR spectra. The calculations reveal that the doped Co n-1Cr+ clusters retain the geometric structures of the most stable [Formula: see text] clusters. However, the coupling of the local magnetic moments within the clusters is altered in a size-dependent way: the Cr Atom is ferromagnetically coupled in Co2Cr+ and Co3Cr+, while it is antiferromagnetically coupled in Co4Cr+.status: publishe
Van Der Tol Johan - One of the best experts on this subject based on the ideXlab platform.
-
Investigation on the Chromium doping effect on small cobalt clusters Con+ (n = 3–5) by IR spectroscopy and DFT calculations
2018Co-Authors: Jia Mei-ye, Van Der Tol Johan, Nhân Lê Pham, Li Yejun, Chernyy Valeriy, Bakker Joost, Nguyen Minh, Janssens EwaldAbstract:Investigation on the Chromium doping effect on small cobalt clusters Con+ (n = 3–5) by IR spectroscopy and DFT calculations Mei-Ye Jia1, Johan van der Tol1, Nhân Lê Pham4, Yejun Li1,2, Valeriy Chernyy3, Joost M. Bakker3, Minh Tho Nguyen4, and Ewald Janssens*1 1 Laboratory of Solid State Physics and Magnetism, KU Leuven, Leuven, Belgium 2 Hunan Key Laboratory of Super Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha, P. R. China 3 Radboud University, FELIX Laboratory, Nijmegen, The Netherlands 4 Department of Chemistry, KU Leuven, Celestijnenlaan 200 F, B-3001 Leuven, Belgium The magnetism in transition metals is one of the most intensively studied properties of bulk matter. A better understanding of magnetism, especially in small particles, is crucial not only for basic physics but also for both the recording industry and the nanotechnologies. (1–2) The magnetism of small cobalt clusters, aggregates of a few cobalt Atoms, is of great scientific interest to understand how magnetic properties evolve from single Atoms to bulk materials. Furthermore, doped cobalt clusters are of interest to investigate how a single dopant Atom may modify the ferromagnetic interaction in cobalt clusters. In this work, the geometric and electronic structures of small cobalt clusters Con+ (n = 3–5) and single Chromium Atom doped cobalt clusters Con-1Cr+ are investigated by comparing infrared multiple photon dissociation (IR-MPD) spectra with density functional theory (DFT) calculations, aiming to explore the doping effect of Chromium upon cobalt clusters. Figure 1 the mass spectra of Con+ and Con-1Cr+ (n = 3–5) clusters. 1. J. Graciani, K. Mudiyanselage, F. Xu, A. E. Baber, J. Evans, S. D. Senanayake, D. J. Stacchiola, P. Liu, J. Hrbek, J. F. Sanz and J. A. Rodriguez, Science, 2014, 345, 546–550. 2. A. C. Cardiel, M. C. Benson, L. M. Bishop, K. M. Louis, J. C. Yeager, Y. Tan and R. J. Hamers, ACS Nano, 2012, 6, 310–318.status: publishe
-
Investigation on the Chromium doping effect on small cobalt clusters Con+ (n = 3–5) by IR spectroscopy and DFT calculations
2018Co-Authors: Jia Mei-ye, Van Der Tol Johan, Nhân Lê Pham, Li Yejun, Chernyy Valeriy, Bakker Joost, Nguyen Minh, Janssens EwaldAbstract:The magnetism in transition metals is one of the most intensively studied properties of bulk matter. A better understanding of magnetism, especially in small particles, is crucial not only for basic physics but also for both the recording industry and the nanotechnologies. (1–2) The magnetism of small cobalt clusters, aggregates of a few cobalt Atoms, is of great scientific interest to understand how magnetic properties evolve from single Atoms to bulk materials. Furthermore, doped cobalt clusters are of interest to investigate how a single dopant Atom may modify the ferromagnetic interaction in cobalt clusters. In this work, the geometric and electronic structures of small cobalt clusters Con+ (n = 3–5) and single Chromium Atom doped cobalt clusters Con-1Cr+ are investigated by comparing infrared multiple photon dissociation (IR-MPD) spectra with density functional theory (DFT) calculations, aiming to explore the doping effect of Chromium upon cobalt clusters.status: publishe
-
Structures and magnetic properties of small Co-n(+) and Con-1Cr+ (n=3-5)clusters
'IOP Publishing', 2018Co-Authors: Jia Meiye, Van Der Tol Johan, Li Yejun, Chernyy Valeriy, Bakker, Joost M, Le, Nhan Pham, Minh, Tho Nguyen, Janssens EwaldAbstract:Small cobalt clusters [Formula: see text] and their single Chromium Atom doped counterparts Co n-1Cr+ (n = 3-5) were studied mass spectrometrically by measuring the infrared multiple photon dissociation (IRMPD) spectra of the corresponding argon tagged complexes. The geometric and electronic structures of the [Formula: see text] and Co n-1Cr+ (n = 3-5) clusters as well as their Ar complexes were optimized by density functional theory (DFT) calculations. The obtained lowest energy structures were confirmed by comparing the IRMPD spectra of [Formula: see text] and [Formula: see text] (n = 3-5, m = 3 and 4) with the corresponding calculated IR spectra. The calculations reveal that the doped Co n-1Cr+ clusters retain the geometric structures of the most stable [Formula: see text] clusters. However, the coupling of the local magnetic moments within the clusters is altered in a size-dependent way: the Cr Atom is ferromagnetically coupled in Co2Cr+ and Co3Cr+, while it is antiferromagnetically coupled in Co4Cr+.status: publishe