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Temperature and size dependence of energy barrier for magnetic flips in L10 FePt nanoparticles: A theoretical study
https://repo.qst.go.jp/records/2001002
https://repo.qst.go.jp/records/20010021fe7bcf2-bc49-46f5-af6d-13c525755da2
| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2024-01-25 | |||||||||
| タイトル | ||||||||||
| タイトル | Temperature and size dependence of energy barrier for magnetic flips in L10 FePt nanoparticles: A theoretical study | |||||||||
| 言語 | en | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
| 資源タイプ | journal article | |||||||||
| 著者 |
Hung Ba Tran
× Hung Ba Tran
× Matsushita Yuichiro
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| 抄録 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | L10 FePt nanoparticle is among the most promising materials for magnetic recording and nanomagnetic applications. In nanoparticles, the superparamagnetic effect, wherein the thermal fluctuation is comparable to the energy barrier for magnetic flips, strongly affects the stability of magnetic recording. The temperature dependence of the magnetic anisotropy constant in L10 FePt nanoparticles is a crucial factor for estimating the relaxation time of magnetic flips in a magnetic nanoparticle. However, comprehensive simulations of the atomic level for energy barrier for magnetic flips in the L10 FePt nanoparticles are lacking. This study entailed a simulation that quantitatively reproduced the size dependence of the Curie temperature of nanoparticles in the experimental studies. Moreover, the surface effect, wherein the magnetization decreases owing to the loss of magnetic exchange interaction pairs on the surface, was also clarified. The temperature and size dependences of energy barrier for the magnetic flips of L10 FePt nanoparticles were elucidated. | |||||||||
| 書誌情報 |
Scripta Materialia 巻 242, 号 15, p. 115947, 発行日 2024-01 |
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| DOI | ||||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | https://doi.org/10.1016/j.scriptamat.2023.115947 | |||||||||
