Micromagnetic studies of laser-induced magnetization dynamics in FePt-C Films

Jingyue Miao, Jian Wang, Ruma Mandal, Dan Wei, Yukiko K. Takahashi, Kazuhiro Hono

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Laser-induced magnetization dynamics has been studied extensively and involves the thermally induced magnetization switching and the assistance to break the symmetry of switching. In this paper, the effects of the laser focus on the laser heating and the temperature profile in the FePt-C granular media are determined by measuring the Kerr signal via all-optical time-resolved magneto-optical Kerr effect. Based on that, we utilize the hybrid Monte Carlo micromagnetic method to simulate laser-induced magnetization dynamics in FePt-C films with different external magnetic fields and laser fluences. The results show that the magnetization dynamics includes an ultrafast demagnetization, a slower magnetization recovery, and a long-timescale magnetization reversal or the continuing recovery, depending on the magnitude of laser fluence and the external magnetic field.

本文言語English
論文番号8385208
ジャーナルIEEE Transactions on Magnetics
54
11
DOI
出版ステータスPublished - 2018 11
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 電子工学および電気工学

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