Structural transition from L10 phase to A1 phase in FePt films caused by ion irradiation
Structural transition from L10 phase to A1 phase in FePt films caused by ion irradiation
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DOI：
10.1063/1.2177382
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发表时间：
2006-03
影响因子：
3.2
通讯作者：
T. Hasegawa;G. Li;W. Pei;H. Saito;S. Ishio;K. Taguchi;K. Yamakawa;N. Honda;K. Ouchi;T. Aoyama;I. Sato
中科院分区：
文献类型：
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作者：
T. Hasegawa;G. Li;W. Pei;H. Saito;S. Ishio;K. Taguchi;K. Yamakawa;N. Honda;K. Ouchi;T. Aoyama;I. Sato
研究了离子辐照（B+、Cr+、Ga+和Nb+）对L10（面心四方结构）FePt薄膜晶体结构和磁性能的影响。用小于 1 at 的 Cr+、Ga+ 和 Nb+ 离子进行辐照。 %（1.6×1015ions∕cm2）剂量产生了从L10相到A1（面心立方结构）相的近乎理想的结构转变，且不损伤薄膜表面。这种结构转变伴随着磁性能的变化，从矫顽力Hc为~7kOe的硬磁体到Hc<1kOe的软磁体。使用聚焦 Ga+ 离子束制备了由硬磁 L10 相和软磁 A1 相组成的二维图案。
The effect of ion irradiation (B+,Cr+,Ga+, and Nb+) on the crystalline structure and magnetic properties of L10 (face-centered tetragonal structure) FePt films was investigated. Irradiating with Cr+,Ga+, and Nb+ ions of less than 1 at. % (1.6×1015ions∕cm2) dose yielded an almost ideal structural transition from the L10 to A1 (face-centered cubic structure) phase withoutdamage to the surface of the film. This structural transition was accompanied by a change in magnetic properties from a hard magnet with a coercivity Hc of ∼7kOe to a soft magnet with Hc<1kOe. A two-dimensional pattern composed of hard magnetic L10 and soft magnetic A1 phases was fabricated by using a focused Ga+ ion beam.