31 citations · 131 across the 15 of their papers we have counts for
15 papers
Temperature Dependence of Magnetocrystalline Anisotropy in Itinerant Ferromagnets
Daisuke Miura, Akimasa Sakuma
We theoretically investigated magnetocrystalline anisotropy (MA) at a finite temperature in ferromagnetic metals. Assuming a Rashba-type ferromagnet with uniaxial MA, we define…
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 Temperature Dependence of Spin Susceptibility in Anisotropic Itinerant Ferromagnets
Daisuke Miura, Akimasa Sakuma
We developed a framework for directly calculating the spin susceptibility of anisotropic itinerant ferromagnets in the full temperature range within the coherent potential approxim…
Measurement of nuclear spin relaxation time in lanthanum aluminate for development of polarized lanthanum target
K. Ishizaki, H. Hotta, I. Ide +10
The nuclear spin-lattice relaxation time () of lanthanum and aluminum nuclei in a single crystal of lanthanum aluminate doped with neodymium ions is studied to estimate the fe…
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…
Voltage-Controlled Magnonic Spin Tunneling Junction
Kohei Ohgane, Yuta Yahagi, Daisuke Miura +1
We theoretically investigate the effective exchange interaction, , mediated by conductive electrons within a nonmagnetic metal spacer, in the presence of a bias vol…
Theoretical Study on Four-fold Symmetric Anisotropic Magnetoresistance Effect in Cubic Single-crystal Ferromagnetic Model
Yuta Yahagi, Daisuke Miura, Akimasa Sakuma
In this study, we present a theoretical interpretation of the experimental results that the anisotropic magnetoresistance (AMR) effect has a four-fold symmetric component, , i…
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…
Microscopic Theory of Magnon-Drag Thermoelectric Transport in Ferromagnetic Metals
Daisuke Miura, Akimasa Sakuma
A theoretical study of the magnon-drag Peltier and Seebeck effects in ferromagnetic metals is presented. A magnon heat current is described perturbatively from the microscopic view…
Charge and Spin Transport in Magnetic Tunnel Junctions: Microscopic Theory
Daisuke Miura, Akimasa Sakuma
We study the charge and spin currents passing through a magnetic tunnel junction (MTJ) on the basis of a tight-binding model. The currents are evaluated perturbatively with respect…