Anisotropic magnetoresistivity and magnetic entropy change in HoAl2 |
| |
| Affiliation: | 1. Departamento de Física, Universidade Federal de Sergipe, 49100-000, São Cristóvão, SE, Brazil;2. Departamento de Ciências Naturais, Universidade Federal de São João del Rei, 36301-160, São João del Rei, MG, Brazil;1. M.Smoluchowski Institute of Physics, Jagiellonian University, Prof. Stanisława Łojasiewicza 11, PL-30-348 Kraków, Poland;2. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P. O. Box 1410, PL-50 950 Wrocław, Poland;3. Laboratoire Léon Brillouin, CEA-CNRS UMR 12, F-91191 Gif-sur-Yvette Cedex, France;1. School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Key Laboratory of Novel Materials for Information Technology of Zhejiang Province, Zhejiang University, Hangzhou, Zhejiang 310027, China;2. Research Center for Solid State Physics and Materials, School of Mathematics and Physics, Suzhou University of Science and Technology, Suzhou 215009, China;1. Department of Applied Science, Haldia Institute of Technology, Haldia 721657, India;2. Department of Physics, Indian Institute of Technology, Kharagpur 721302, India;1. The Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, IA 50011-3020, USA;2. Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011-2300, USA |
| |
| Abstract: | We report a correlation between magnetoresistivity Δρmag and magnetic entropy change ΔSmag for specified crystallographic directions of a HoAl2 single crystal. This ferromagnetic compound shows differentiated behavior among the members of the RAl2 series due to the presence of spontaneous spin reorientation. We discussed this effect in order to establish a relationship between the two quantities studied. The calculations were performed using a self-consistent model based on a Hamiltonian containing exchange, Zeeman and crystal field terms. We found that the normalized relation {Δρmag} = (T/TC)m{ΔSmag}, with m = 0.1 for the 100] and 110] directions matches satisfactorily the two quantities. |
| |
| Keywords: | Magnetocaloric effect Magnetoresistivity Spin reorientation Anisotropy |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
