| 非晶态Co70Cr20Zr10合金在居里温度附近的磁性 |
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| 引用本文： | 胡凤霞,沈保根,陈金昌,郭慧群.非晶态Co70Cr20Zr10合金在居里温度附近的磁性[J].物理学报,1991,40(12):2006-2011. |
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| 作者姓名： | 胡凤霞 沈保根 陈金昌 郭慧群 |
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| 作者单位： | (1)北京师范学院物理系,北京,100037; (2)中国科学院物理研究所磁学开放研究实验室,北京,100080 |
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| 基金项目： | 北京市自然科学基金资助的课题 |
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| 摘 要： | 本文研究非晶态Co70Cr20Zr10合金在居里温度附近的磁性,样品的磁特性符合二级相变规律。得到临界指数β=0.45±0.02,γ=1.9±0.1,δ=5.13±0.05。Co70Cr20Zr10合金的居里温度为Tc=(186.7±0.2)K。临界指数β,γ,δ满足γ=β(δ-1)关系,但临界指数值都偏离三维Heisenberg模型的理论值,这种行为可能起源于非晶态合金磁的不均匀性。讨论了Kouvel-Fisher(K-F)参数γ(T)对温度T的依赖关系。
关键词：
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| 关 键 词： | 非晶态 合金 居里温度 磁性 |
| 收稿时间： | 1/7/1991 12:00:00 AM |
MAGNETIC PROPERTIES OF AMORPHOUS Co70Cr20Zr10 ALLOYS NEAR THE CURIE TEMPERATURE |
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| HU FENG-XIA,SHEN BAO-GEN,CHEN JIN-CHANG and GUO HUI-QUN.MAGNETIC PROPERTIES OF AMORPHOUS Co70Cr20Zr10 ALLOYS NEAR THE CURIE TEMPERATURE[J].Acta Physica Sinica,1991,40(12):2006-2011. |
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| Authors: | HU FENG-XIA SHEN BAO-GEN CHEN JIN-CHANG and GUO HUI-QUN |
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| Abstract: | Magnetic properties of the amorphous Co70Cr20Zr10 alloys near the Curie temperature are reported. The behavior is found to obey second-order phase transition laws with critical indices: β=0.45 ± 0.02, γ= 1.9 ±0.1, δ = 5.13±0.05, and the ferromagnetic Curie temperature Tc= (186.7±0.2)K. The critical indices satisfy the scaling law relationship γ = β(δ- 1), but their values deviated with the 3D-Heisenberg model. This behavior may arise from the magnetically inhomogeneous behavior of the alloy. Finally, the temperature dependence of the Kouvel-Fisher exponent γ(T) is discussed. |
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