Heat-assisted magnetization reversal using pulsed laser irradiation in patterned magnetic thin film with perpendicular anisotropy

Keita Waseda, Ryosuke Doi, Budi Purnama, Satoru Yoshimura, Yukio Nozaki, Kimihide Matsuyama

研究成果: Article査読

7 被引用数 (Scopus)

抄録

Cooling velocity of patterned Tb-Fe film with a lateral size of 50 × 50 μm2 was experimentally investigated for the application to heat-assisted writing operation in high-density magnetic random access memories. The patterned Tb-Fe film was heated-up by using pulsed YAG laser irradiations with the duration of 1 ns which is realizing a semi-adiabatic heating process. The ratio of magnetization reversal in the patterned Tb-Fe film was estimated by measuring an anomalous Hall voltage. The main results are as follows: (1) Magnetic field required for magnetization reversal of Tb-Fe film was decreased from 1.4 kOe to 200 Oe by applying the heat-assisted magnetization reversal method. (2) Cooling velocity of patterned Tb-Fe film can be estimated by using pulsed magnetic fields with various time delays from the pulsed laser irradiation. (3) With increasing the thermal conductivity coefficient of electrical leads, the velocity to cool the patterned Tb-Fe film increased.

本文言語English
ページ(範囲)2483-2486
ページ数4
ジャーナルIEEE Transactions on Magnetics
44
11 PART 2
DOI
出版ステータスPublished - 2008 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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