FeCoNiMn多组元合金的磁性临界行为研究
Study on the Magnetic Critical Behavior of FeCoNiMn Multi-Component Alloys
摘要: 伴随着多组元合金的发现，近几十年来关于其磁学性质的研究逐渐兴起。在磁性多组元合金的研究中，一个关键的科学问题仍未得到解答：高构型熵(或组分熵)与内禀磁相互作用之间究竟存在何种关联？为阐明这一问题，本文分析了等化学原子比多组元合金FeCoNiMn在铁磁–顺磁转变过程中的临界指数。结果表明：该体系的临界指数γ与3-D海森堡模型相近，但β值显著高于任何一种经典模型。多组元合金中原子占位无序导致的磁有序建立速率减缓，是β值升高的关键因素。结合其他关于多组元合金磁性临界行为的研究，本文认为高β值是具有随机原子占位的多组元固溶体的共同特征。
Abstract: Accompanied by the discovery of multi-component alloys, investigations into their magnetic properties have gradually emerged in recent decades. In the study of magnetic multi-component alloys, a key scientific question remains unanswered: What is the relationship between high configurational entropy and intrinsic magnetic interactions? To shed light on this question, this paper analyzes the critical exponents of the equiatomic multi-component alloy FeCoNiMn across the ferromagnetic-paramagnetic transition. The results show that the critical exponent γ of FeCoNiMn is close to that of the 3-D Heisenberg model, while β is significantly higher than that of any classical model. Atomic site disorder in multi-component alloys slows down the establishment of magnetic order, which is a key factor leading to the elevated β value. Combined with other studies on the magnetic critical behavior of multi-component alloys, this work suggests that a high β value is a common feature of multi-component solid solutions with random atomic occupation.
文章引用：玄名彤, 王艺涵, 王贺, 龚元元. FeCoNiMn多组元合金的磁性临界行为研究[J]. 材料科学, 2026, 16(5): 156-166. https://doi.org/10.12677/ms.2026.165110

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