Magnetocrystalline Anisotropy of Fe-Si Alloy Crystals under Hydrostatic Pressure
Magnetocrystalline Anisotropy of Fe-Si Alloy Crystals under Hydrostatic Pressure
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DOI：
10.1063/1.2000434
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发表时间：
1961-03
影响因子：
3.2
通讯作者：
J. Kouvel;R. H. Wilson
中科院分区：
文献类型：
--
作者：
J. Kouvel;R. H. Wilson
分别在< 100>、< 110>和< 11>三个方向上进行了室温下的磁化测量。% Si - Fe合金晶体承受高达5100 bar的静水压力。所有实验结果都与K1−1(∂K1/∂p) =−60、K2−1(∂K2/∂p) = 0和σ3−1(∂σ3/∂p) =−5.5（均为10−7 bar−1）的理论曲线吻合，其中各向异性常数K1和K2分别为46和7（单位为103 erg/g），饱和矩σ3为204 emu。当K1和σ3的压力依赖关系转换为体积依赖关系并结合热膨胀数据时，这些值可以解释最近对该合金的测量结果与K1和σ3随温度变化的理论10次幂关系之间的部分差异，但只是其中的一小部分。对于纯铁，也可以得到类似的情况。
Magnetization measurements at room temperature were made for various fields applied in 〈100〉, 〈110〉, and 〈111〉 directions of 6 at. % Si in Fe alloy crystals subjected to hydrostatic pressures up to 5100 bar. All the experimental results are found to agree closely with theoretical curves computed for K1−1(∂K1/∂p) = −60, K2−1(∂K2/∂p) = 0, and σ3−1(∂σ3/∂p) = −5.5 (all in 10−7 bar−1), where the anisotropy constants K1 and K2 are 46 and 7 (in 103 erg/g), respectively, and the saturation moment σ3, is 204 emu. These values for the pressure dependences of K1 and σ3, when converted to volume dependences and combined with thermal dilatation data, can account for some but only a small part of the discrepancy between recent measurements on this alloy and the theoretical l0th-power relation between the variations of K1 and σ3 with temperature. A similar situation is shown to obtain for pure iron.