TY - JOUR
T1 - Theoretical study on anisotropic magnetoresistance effect for weak ferromagnets with a crystal field of tetragonal symmetry
AU - Kokado, Satoshi
AU - Tsunoda, Masakiyo
N1 - Funding Information:
This work has been supported by Grant-in-Aid for Scientific Research (C) (No. 16K04930 ) from the Japan Society for the Promotion of Science .
Publisher Copyright:
© 2020 Elsevier Ltd. All rights reserved.
PY - 2020
Y1 - 2020
N2 - We derive an expression of the anisotropic magnetoresistance (AMR) ratio for weak ferromagnets with a crystal field of tetragonal symmetry using the electron scattering theory. This theory is based on the twocurrent model consisting of a conduction state and localized d states with a spin-orbit interaction and the crystal field. The expression of the AMR ratio is related to the partial density of states of each orbital at the Fermi energy. On the basis of this expression, we investigate the sign of the AMR ratio. In addition, we analyze the experimental result of the negative AMR ratio at low temperature for a typical weak ferromagnet, bcc Fe.
AB - We derive an expression of the anisotropic magnetoresistance (AMR) ratio for weak ferromagnets with a crystal field of tetragonal symmetry using the electron scattering theory. This theory is based on the twocurrent model consisting of a conduction state and localized d states with a spin-orbit interaction and the crystal field. The expression of the AMR ratio is related to the partial density of states of each orbital at the Fermi energy. On the basis of this expression, we investigate the sign of the AMR ratio. In addition, we analyze the experimental result of the negative AMR ratio at low temperature for a typical weak ferromagnet, bcc Fe.
KW - Anisotropic magnetoresistance
KW - Crystal field
KW - Fe
KW - Perturbation theory
KW - Spin-orbit interaction
KW - Weak ferromagnet
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U2 - 10.1016/j.matpr.2020.05.224
DO - 10.1016/j.matpr.2020.05.224
M3 - Conference article
AN - SCOPUS:85102510704
SN - 2214-7853
VL - 33
SP - 1864
EP - 1868
JO - Materials Today: Proceedings
JF - Materials Today: Proceedings
T2 - 10th International Conference on Key Engineering Materials, ICKEM 2020
Y2 - 26 March 2020 through 29 March 2020
ER -