Pilot study of temperature-dependent Barkhausen noise in cobalt and gadolinium

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27240%2F25%3A10258719" target="_blank" >RIV/61989100:27240/25:10258719 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/25:10508061

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0304885325008856" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0304885325008856</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmmm.2025.173651" target="_blank" >10.1016/j.jmmm.2025.173651</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pilot study of temperature-dependent Barkhausen noise in cobalt and gadolinium

Popis výsledku v původním jazyce

This paper deals with Barkhausen noise emission in Gd and Co. Barkhausen noise emission was investigated in a temperature range mainly below the Gd Curie temperature, at which spontaneous magnetisation in Gd occurs. Barkhausen noise from the heavy rare-earth Gd is compared with Barkhausen noise emission from the transition metal Co measured under the same magnetising and other conditions. This study demonstrates that the Barkhausen noise evolution for Gd is quite different from that of Co. This is a consequence of different spin exchange interactions among the neighbouring atoms and different domain wall thicknesses, domain wall energies and densities. Barkhausen noise emission in Gd is strongly sensitive to the altering magnetic state, expressed in terms of magnetocrystalline anisotropy and canted magnetism, whereas the quite weak Barkhausen noise in Co is a result of the twinned structure, where the high density of the deformation twins strongly hinders the motion of domain walls, as well as the free path of their motion. The number of calculated DWs in motion increases along with the number of detected Barkhausen pulses in the case of Co, whereas the canted magnetism makes this evolution more complicated in the case of Gd.

Název v anglickém jazyce

Pilot study of temperature-dependent Barkhausen noise in cobalt and gadolinium

Popis výsledku anglicky

This paper deals with Barkhausen noise emission in Gd and Co. Barkhausen noise emission was investigated in a temperature range mainly below the Gd Curie temperature, at which spontaneous magnetisation in Gd occurs. Barkhausen noise from the heavy rare-earth Gd is compared with Barkhausen noise emission from the transition metal Co measured under the same magnetising and other conditions. This study demonstrates that the Barkhausen noise evolution for Gd is quite different from that of Co. This is a consequence of different spin exchange interactions among the neighbouring atoms and different domain wall thicknesses, domain wall energies and densities. Barkhausen noise emission in Gd is strongly sensitive to the altering magnetic state, expressed in terms of magnetocrystalline anisotropy and canted magnetism, whereas the quite weak Barkhausen noise in Co is a result of the twinned structure, where the high density of the deformation twins strongly hinders the motion of domain walls, as well as the free path of their motion. The number of calculated DWs in motion increases along with the number of detected Barkhausen pulses in the case of Co, whereas the canted magnetism makes this evolution more complicated in the case of Gd.

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)

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of magnetism and magnetic materials

ISSN

0304-8853

e-ISSN

1873-4766

Svazek periodika

636

Číslo periodika v rámci svazku

December 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

"173651(1)"-"173651(11)"

Kód UT WoS článku

001619286600002

EID výsledku v databázi Scopus

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