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

Result code in 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>
Alternative codes found
RIV/00216208:11320/25:10508061
Result on the web
<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>

Result language
angličtina
Original language name
Pilot study of temperature-dependent Barkhausen noise in cobalt and gadolinium
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
<a href="/en/project/EF17_048%2F0007399" target="_blank" >EF17_048/0007399: New Composite Materials for Environmental Applications</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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