Zobrazeno 1 - 10
of 188
pro vyhledávání: '"Nishino, Masamichi"'
We study the field--temperature phase diagram of the two-dimensional dipolar Ising ferromagnet on a kagome lattice with a specific ratio between the exchange and dipolar constants, $\delta = 1$. Using the stochastic cutoff (SCO) $O(N)$ Monte Carlo me
Externí odkaz:
http://arxiv.org/abs/2202.12531
Publikováno v:
Journal of Applied Physics; 7/21/2024, Vol. 136 Issue 3, p1-11, 11p
Publikováno v:
Phys. Rev. B 103, 214404 (2021)
We study phase transitions in the two-dimensional Heisenberg model with the Dzyaloshinskii-Moriya interaction, the Ising anisotropy ($\eta$), and the dipolar interaction under zero and finite magnetic fields ($H$). For three typical strengths (zero,
Externí odkaz:
http://arxiv.org/abs/2011.05496
Autor:
Nishino, Masamichi, Miyashita, Seiji
Publikováno v:
Phys. Rev. B 100, 020403(R) (2019)
We find unusual temperature dependence of the ferromagnetic resonance (FMR) frequency $f_{\rm R}$ for the spin-reorientation (SR) transition, in which the easy axis changes depending on temperature, observed in the Nd permanent magnet, Nd$_2$Fe$_{14}
Externí odkaz:
http://arxiv.org/abs/2009.08581
Publikováno v:
Phys. Rev. B 103, 014418 (2021)
The Nd permanent magnet (Nd$_{2}$Fe$_{14}$B) is an indispensable material used in modern energy conversion devices. The realization of high coercivity at finite temperatures is a burning issue. One of the important ingredients for controlling the coe
Externí odkaz:
http://arxiv.org/abs/2009.08572
Publikováno v:
Phys. Rev. B 100, 094407 (2019)
We investigate phase transitions in the two-dimensional dipolar Heisenberg model with uniaxial anisotropy with a specific ratio between the exchange and dipolar constants, $\delta=1$. We obtain the $\eta$--$T$ (anisotropy vs. temperature) phase diagr
Externí odkaz:
http://arxiv.org/abs/1906.02954
Publikováno v:
Phys. Rev. B 98, 144402 (2018)
The interplay between competing short-range (SR) and long-range (LR) interactions can cause nontrivial structures in phase diagrams. Recently, horn-shaped unusual structures were found by Monte Carlo simulations in the phase diagram of the Ising anti
Externí odkaz:
http://arxiv.org/abs/1810.01687
Publikováno v:
Phys. Rev. E 98, 062126 (2018)
We study field-induced phase transitions in the two-dimensional dipolar Ising ferromagnet with a specific ratio between the exchange and dipolar constants, $\delta=1$, which exhibits a stripe-ordered phase with the width of one lattice unit at low te
Externí odkaz:
http://arxiv.org/abs/1808.06061
Publikováno v:
Phys. Rev. B 98, 054418 (2018)
We examine the anisotropic properties of the exchange stiffness constant, $\mathcal{A}$, for rare-earth permanent magnet, Nd$_2$Fe$_{14}$B, by connecting analyses with two different scales of length, i.e., Monte Carlo (MC) method with an atomistic sp
Externí odkaz:
http://arxiv.org/abs/1804.05824
Publikováno v:
Phys. Rev. B 97, 104427 (2018)
We developed a new algorithm for the stochastic cutoff method, which is a Monte Carlo method for long-range interacting systems. The present new algorithm is efficient for complicated lattice structures, e.g., amorphous and also materials with compli
Externí odkaz:
http://arxiv.org/abs/1711.02284