Magnetic properties and microstructure of FePt–M–B(MZr, Nb, La) films
Magnetic properties and microstructure of FePt–M–B(MZr, Nb, La) films
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DOI：
10.1016/j.jmmm.2006.11.138
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发表时间：
2007-03
影响因子：
2.7
通讯作者：
Haruhiko Okumura;S. Nishinakagawa;T. Bitoh;A. Makino;Kazuhisa Sato;Y. Hirotsu
中科院分区：
文献类型：
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作者：
Haruhiko Okumura;S. Nishinakagawa;T. Bitoh;A. Makino;Kazuhisa Sato;Y. Hirotsu
研究了FePt-M-B （MZr,Nb,La）溅射沉积薄膜的显微结构和矫顽力的组分依赖性。沉积的三元FePt-B薄膜具有非晶结构和低矫顽力。在923K下退火1.8ks后，观察到有序的L10FePt纳米颗粒。随着第四元素M（Zr,Nb,La）的加入，沉积膜也呈现出非晶态结构。在相同条件下退火后，薄膜的矫顽力达到了~ 520kA/m，并形成了有序的L10FePt相。与三元FePt-B薄膜相比，其结构、矫顽力和晶粒尺寸随添加元素(M)和成分的不同而不同。研究了添加元素对l10有序相转变的影响。
We investigated the compositional dependence of microstructure and the coercivity of FePt–M–B(MZr,Nb,La) sputter-deposited films. As-deposited ternary FePt–B films have an amorphous structure and low coercivity. After annealing at 923K for 1.8ks, ordered L10FePt nanoparticles were observed. With the adding of the fourth element of M(Zr,Nb,La), the as-deposited films were also of the amorphous structure. After annealing at the same condition, the films show high coercivity of ∼520kA/m and ordered L10FePt phase are found. Compared with the ternary FePt–B films, the structure, coercivity and grain size vary with the additional element (M) and the compositions. The effects of additive elements on transformation to the L10-ordered phase have been studied.