Magnetocrystalline anisotropy in permalloy revisited.
Magnetocrystalline anisotropy in permalloy revisited.
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DOI：
10.1103/physrevlett.97.067203
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发表时间：
2006-08
影响因子：
8.6
通讯作者：
Lifeng Yin;Dahai Wei;N. Lei;Lei Zhou;Chuanshan Tian;G. Dong;Xiaofeng Jin;L. Guo;Q. Jia-Q.-J
中科院分区：
文献类型：
--
作者：
Lifeng Yin;Dahai Wei;N. Lei;Lei Zhou;Chuanshan Tian;G. Dong;Xiaofeng Jin;L. Guo;Q. Jia-Q.-J
采用分子束外延的方法在GaAs（001）上生长出具有体心立方结构的坡莫合金。实验测定了其磁性、居里温度和磁性各向异性，并与传统的面心立方坡莫合金进行了比较。出乎意料的是，坡莫合金中消失的磁立方各向异性与它的原子结构无关，而只取决于FexNi1-x合金中铁和镍的化学计量。这一观察结果被第一性原理电子能带计算进一步研究和证实，这有助于理解为什么坡莫合金应该是软磁铁的长期问题。
Permalloy with a body-centered-cubic structure has been grown on GaAs(001) by molecular beam epitaxy. Its magnetism, Curie temperature, and magnetic anisotropy are determined experimentally and compared to those of conventional face-centered-cubic Permalloy. Unexpectedly the vanishing magnetic cubic anisotropy in Permalloy is found to be independent of its atomic structure but depends only upon the stoichiometry of Fe and Ni in the FexNi1-x alloy. This observation is further investigated and confirmed by first-principles electronic band calculations, which help to understand the long-standing issue of why Permalloy should be a soft magnet.