31 citations · 131 across the 15 of their papers we have counts for
8 papers · 1 filter
Perpendicularly Polarized Spin Hall Effects Induced by Spin-Dependent Scattering in Ferromagnetic Metals
Yuta Yahagi, Daisuke Miura, Akimasa Sakuma
Spin currents in ferromagnets afford diverse functionalities. We evaluate the extrinsic spin Hall effects of magnetic impurity scattering in ferromagnetic metals. We show that spin…
Theoretical Study of Extrinsic Spin-current Generation in Ferromagnets Induced by Anisotropic Spin-flip Scattering
Yuta Yahagi, Jakub Zelezny, Daisuke Miura +1
The spin Hall effect (SHE) and the magnetic spin Hall effect (MSHE) are responsible for electrical spin current generation, which is a key concept of modern spintronics. We theoret…
Analytic Expression for Magnetic Activation Energy
Daisuke Miura, Akimasa Sakuma
We theoretically investigate the magnetic activation energy of permanent magnets. Practically, it is widely used in a phenomenological form as $\mathcal{F}_\mathrm{B}(H_\mathrm{ext…
Noncollinearity effects on magnetocrystalline anisotropy for FeB magnets
Daisuke Miura, Akimasa Sakuma
We present a theoretical investigation of the magnetocrystalline anisotropy (MA) in FeB ( is a rare-earth element) magnets in consideration of the non-collinearity e…
Power law analysis for temperature dependence of magnetocrystalline anisotropy constants of NdFeB magnets
Daisuke Miura, Akimasa Sakuma
Phenomenological analysis for the temperature dependence of the magnetocrystalline anisotropy (MA) in rare earth magnets is presented. We define phenomenological power laws applica…
General Formalism for Magnetic Anisotropy Constants
Daisuke Miura, Ryo Sasaki, Akimasa Sakuma
Direct expressions for the magnetic anisotropy constants are given at a finite temperature from microscopic viewpoints. In the present derivation, it is assumed that the Hamiltonia…
Spin-wave-induced spin torque in Rashba spin-orbit coupling system
Nobuyuki Umetsu, Daisuke Miura, Akimasa Sakuma
We study the effects of Rashba spin-orbit coupling on the spin torque induced by spin waves, which are the plane wave dynamics of magnetization. The spin torque is derived from lin…
Theoretical evaluation on the temperature dependence of magnetic anisotropy constants of Nd2Fe14B - Effects of exchange field and crystal field strength -
Ryo Sasaki, Daisuke Miura, Akimasa Sakuma
To identify the possible mechanism of coercivity (Hc) degradation of Nd-Fe-B sintered magnets, we study the roles of the exchange field acting on the 4f electrons in Nd ions and th…