EFFECT OF SPIN FLUCTUATIONS ON MAGNETIC-PROPERTIES AND THERMAL-EXPANSION IN PSEUDOBINARY SYSTEM FEXCO1-XSI
EFFECT OF SPIN FLUCTUATIONS ON MAGNETIC-PROPERTIES AND THERMAL-EXPANSION IN PSEUDOBINARY SYSTEM FEXCO1-XSI
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DOI：
10.1143/jpsj.59.305
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发表时间：
1990-01-01
影响因子：
1.7
通讯作者：
WATANABE, H
中科院分区：
文献类型：
--
作者：
SHIMIZU, K;MARUYAMA, H;WATANABE, H
对相同样品的FexCo1−xSi合金进行了磁化和热膨胀测量。根据Takahashi提出的自旋涨落理论对磁化数据进行了分析，以获得关于该系统自旋涨落的性质的信息。我们发现，用该理论可以很好地解释铁磁合金磁行为的浓度变化，如Arrott图和自发磁化强度与温度的关系。在较宽的浓度范围内，根据SCR理论，由热膨胀系数估算了磁体体积耦合常数。磁体效应也很好地符合高桥理论的预测，甚至在数量上也是如此。
Both magnetization and thermal expansion measurements have been made on the same samples of Fe x Co 1− x Si alloys. The magnetization data is analyzed on the basis of the spin fluctuation theory developed by Takahashi to obtain information on the nature of spin fluctuations of this system. We found that concentration variation of magnetic behaviors of the ferromagnetic alloys, such as the Arrott plots and the temperature dependence of spontaneous magnetization, is quantitatively well explained by the theory. Magnetovolume coupling constant is also estimated from thermal expansion coefficient on the basis of the SCR theory over the wide concentration range. The magnetovolume effect is also in good accordance with the predictions of Takahashi’s theory, even quantitatively.