Differential isotropic model of ferromagnetic hysteresis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27240%2F23%3A10252853" target="_blank" >RIV/61989100:27240/23:10252853 - isvavai.cz</a>

Výsledek na webu

<a href="https://journals.aps.org/prb/abstract/10.1103/PhysRevB.108.104414" target="_blank" >https://journals.aps.org/prb/abstract/10.1103/PhysRevB.108.104414</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.108.104414" target="_blank" >10.1103/PhysRevB.108.104414</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Differential isotropic model of ferromagnetic hysteresis

Popis výsledku v původním jazyce

This paper presents an alternative isotropic model of magnetization curves in ferromagnetic materials. It is based on the well-known Jiles-Atherton model, but significantly modifies its assumptions to be consistent with fundamental physical principles. As a result, the number of model parameters has been reduced to four. The differential model couples the volume energy density of the sample with the external magnetic field and includes the process of rigid and flexible overcoming of the pinning sites in the law of energy density conservation. The magnetic moment magnitude is connected with coherent regions called magnetic clusters, which are smaller than magnetic domains. The commonly used concept of anhysteretic magnetization, based on the Langevin function, is modified by a parameter β, which represents the average mutual interaction among magnetic clusters. The model was successfully tested on two isotropic materials: amorphous Fe77.5Si7.5B15 alloy and powdered magnetite. The main advantages compared with previous models are the simpler model equation and a much more convenient numerical and fitting procedure.

Název v anglickém jazyce

Differential isotropic model of ferromagnetic hysteresis

Popis výsledku anglicky

This paper presents an alternative isotropic model of magnetization curves in ferromagnetic materials. It is based on the well-known Jiles-Atherton model, but significantly modifies its assumptions to be consistent with fundamental physical principles. As a result, the number of model parameters has been reduced to four. The differential model couples the volume energy density of the sample with the external magnetic field and includes the process of rigid and flexible overcoming of the pinning sites in the law of energy density conservation. The magnetic moment magnitude is connected with coherent regions called magnetic clusters, which are smaller than magnetic domains. The commonly used concept of anhysteretic magnetization, based on the Langevin function, is modified by a parameter β, which represents the average mutual interaction among magnetic clusters. The model was successfully tested on two isotropic materials: amorphous Fe77.5Si7.5B15 alloy and powdered magnetite. The main advantages compared with previous models are the simpler model equation and a much more convenient numerical and fitting procedure.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

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

Projekt

<a href="/cs/project/EF17_048%2F0007399" target="_blank" >EF17_048/0007399: Nové kompozitní materiály pro environmentální aplikace</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Physical review B

ISSN

2469-9950

e-ISSN

2469-9969

Svazek periodika

108

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

"104414(1)"-"104414(7)"

Kód UT WoS článku

001127441900004

EID výsledku v databázi Scopus

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