Magnetostriction of ternary Fe-Ga-X (X = C, V, Cr, Mn, Co, Rh) alloys
Magnetostriction of ternary Fe-Ga-X (X = C, V, Cr, Mn, Co, Rh) alloys
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DOI：
10.1063/1.2670376
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发表时间：
2007-05-01
影响因子：
3.2
通讯作者：
Summers, E.
中科院分区：
文献类型：
--
作者：
Clark, A. E.;Restorff, J. B.;Summers, E.
二元铁镓合金在很宽的温度范围内具有很大的磁致伸缩性。单晶测量表明，添加2at。%或更多的具有比Fe更少（V、Cr、Mo、Mn）和更多（Co、Ni、Rh）价电子的3d和4d过渡元素，都降低饱和磁致伸缩。Kawamiya和阿达奇[J. Magn. Magn. Mater. 31-34，145（1983）]报道了D 0（3）结构被具有小于铁和大于铁的电子/原子比的3d过渡元素稳定。如果D 0（3）有序化降低了磁致伸缩，则对于所观察到的（更无序的）二元Fe-Ga合金，最大磁致伸缩应该是最大的。值得注意的是，添加少量的C（0.07、0.08和0.14 at. %）将缓慢冷却的二元合金的磁致伸缩增加到与快速淬火合金相当的值。我们假设小原子（C，B，N）的加入会阻碍有序化，从而使磁致伸缩最大化而不发生淬灭。
Binary iron-gallium (Galfenol) alloys have large magnetostrictions over a wide temperature range. Single crystal measurements show that additions of 2 at. % or greater of 3d and 4d transition elements with fewer (V, Cr, Mo, Mn) and more (Co, Ni, Rh) valence electrons than Fe, all reduce the saturation magnetostriction. Kawamiya and Adachi [J. Magn. Magn. Mater. 31-34, 145 (1983)] reported that the D0(3) structure is stabilized by 3d transition elements with electron/atom ratios both less than iron and greater than iron. If D0(3) ordering decreases the magnetostriction, the maximum magnetostriction should be largest for the (more disordered) binary Fe-Ga alloys as observed. Notably, addition of small amounts of C (0.07, 0.08, and 0.14 at. %) increases the magnetostriction of the slow cooled binary alloy to values comparable to the rapidly quenched alloy. We assume that small atom (C, B, N) additions enter interstitially and inhibit ordering, thus maximizing the magnetostriction without quenching.