Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Kokado, Satoshi"'
Autor:
Kokado, Satoshi, Tsunoda, Masakiyo
Publikováno v:
J. Phys. Soc. Jpn. 91, 044701 (2022) [open access]
We develop a theory of the anisotropic magnetoresistance (AMR) effects of arbitrary directions of current and magnetization for ferromagnets. Here, we use the electron scattering theory with the $s$--$s$ and $s$--$d$ scattering processes, where $s$ i
Externí odkaz:
http://arxiv.org/abs/2202.02810
Autor:
Kokado, Satoshi, Tsunoda, Masakiyo
Publikováno v:
J. Phys. Soc. Jpn. 88, 034706 (2019) [open access]
Using the electron scattering theory, we obtain analytic expressions for anisotropic magnetoresistance (AMR) ratios for ferromagnets with a crystal field of tetragonal symmetry. Here, a tetragonal distortion exists in the [001] direction, the magneti
Externí odkaz:
http://arxiv.org/abs/1903.01317
Publikováno v:
Jpn. J. Appl. Phys. 55, 108004 (2016)
We derive a simple relational expression between the spin polarization ratio of resistivity, $P_\rho$, and the anisotropic magnetoresistance ratio $\Delta \rho/\rho$, and that between the spin polarization ratio of the density of states at the Fermi
Externí odkaz:
http://arxiv.org/abs/1608.08888
Autor:
Kokado, Satoshi, Tsunoda, Masakiyo
Publikováno v:
J. Phys. Soc. Jpn. 84, 094710 (2015) [open access]
We theoretically study the twofold and fourfold symmetric anisotropic magnetoresistance (AMR) effects of ferromagnets. We here use the two-current model for a system consisting of a conduction state and localized d states. The localized d states are
Externí odkaz:
http://arxiv.org/abs/1507.05912
Autor:
Kokado, Satoshi, Tsunoda, Masakiyo
Publikováno v:
Advanced Materials Research 750-752 (2013) 978 - 982 [open access]
We derive the general expression of the anisotropic magnetoresistance (AMR) ratio of ferromagnets for a relative angle between the magnetization direction and the current direction. We here use the two-current model for a system consisting of a spin-
Externí odkaz:
http://arxiv.org/abs/1305.3517
Publikováno v:
J. Phys. Soc. Jpn. 81 (2012) 024705 [open access]
We theoretically analyze the anisotropic magnetoresistance (AMR) effects of bcc Fe (+), fcc Co (+), fcc Ni (+), Fe$_4$N (-), and a half-metallic ferromagnet (-). The sign in each ( ) represents the sign of the AMR ratio observed experimentally. We he
Externí odkaz:
http://arxiv.org/abs/1111.4864
Publikováno v:
J. Phys. Soc. Jpn. 79 (2010) 114721-1 - 114721-24
We derive the spin-atomic vibration interaction $V_{\rm SA}$ and the spin-flip Hamiltonian $V_{\rm SF}$ of a single atomic spin in a crystal field. We here apply the perturbation theory to a model with the spin-orbit interaction and the kinetic and p
Externí odkaz:
http://arxiv.org/abs/1009.3634
Publikováno v:
Phys. Rev. B 76 (2007), 054451-1 - 054451-11
This is a theoretical study of the reversal of a localized quantum spin induced by sequential injection of spins for a spin quantum dot that has a quantum spin. The system consists of ``electrode/quantum well(QW)/dot/QW/electrode" junctions, in which
Externí odkaz:
http://arxiv.org/abs/0708.1504
Publikováno v:
Phys. Rev. B 73, 172410 (2006)
In order to propose a ferromagnet exhibiting highly spin-polarized transport, we theoretically analyzed the spin polarization ratio of the conductivity of the bulk Fe$_4$N with a perovskite type structure, in which N is located at the body center pos
Externí odkaz:
http://arxiv.org/abs/cond-mat/0605001
Autor:
Kokado, Satoshi, Harigaya, Kikuo
Publikováno v:
Synthetic Metals, Volume 152, Issues 1-3, 20 September 2005, Pages 465-468
Towards a novel magnetoresistance (MR) device with a carbon nanotube, we propose ``nonmagnetic metal/zigzag nanotube encapsulating magnetic atoms/nonmagnetic metal'' junctions. We theoretically investigate how spin-polarized edges of the nanotube and
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412587