First-principles calculations of magnetic properties for analysis of magnetization processes in rare-earth permanent magnets

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00552126" target="_blank" >RIV/68378271:_____/21:00552126 - isvavai.cz</a>

Výsledek na webu

<a href="http://hdl.handle.net/11104/0327452" target="_blank" >http://hdl.handle.net/11104/0327452</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/14686996.2021.1947119" target="_blank" >10.1080/14686996.2021.1947119</a>

Jazyk výsledku

angličtina

Název v původním jazyce

First-principles calculations of magnetic properties for analysis of magnetization processes in rare-earth permanent magnets

Popis výsledku v původním jazyce

It has been empirically known that the coercivity of rare-earth permanent magnets depends on the size and shape of fine particles of the main phase in the system. Also, recent experimental observations have suggested that the atomic-scale structures around the grain-boundaries of the fine particles play a crucial role to determine their switching fields. In this article, we review a theoretical attempt to describe the finite temperature magnetic properties and to evaluate the reduction of the switching fields of fine particles of several rare-earth permanent magnetic materials based on an atomistic spin model that is constructed using first-principles calculations. It is shown that, over a wide temperature range, the spin model gives a good description of the magnetization curves of rare-earth intermetallic compounds such as R2Fe14B (R= Dy, Ho, Pr, Nd, Sm) and SmFe12.

Název v anglickém jazyce

First-principles calculations of magnetic properties for analysis of magnetization processes in rare-earth permanent magnets

Popis výsledku anglicky

It has been empirically known that the coercivity of rare-earth permanent magnets depends on the size and shape of fine particles of the main phase in the system. Also, recent experimental observations have suggested that the atomic-scale structures around the grain-boundaries of the fine particles play a crucial role to determine their switching fields. In this article, we review a theoretical attempt to describe the finite temperature magnetic properties and to evaluate the reduction of the switching fields of fine particles of several rare-earth permanent magnetic materials based on an atomistic spin model that is constructed using first-principles calculations. It is shown that, over a wide temperature range, the spin model gives a good description of the magnetization curves of rare-earth intermetallic compounds such as R2Fe14B (R= Dy, Ho, Pr, Nd, Sm) and SmFe12.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/EF16_019%2F0000760" target="_blank" >EF16_019/0000760: Fyzika pevných látek pro 21. století</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Science and Technology of Advanced Materials

ISSN

1468-6996

e-ISSN

1878-5514

Svazek periodika

22

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

748-757

Kód UT WoS článku

000693424900001

EID výsledku v databázi Scopus

2-s2.0-85114448963