Magnetic Transformations and Phase Diagrams

Magnetic Transformations and Phase Diagrams
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磁变换和相图

DOI:
10.1007/s11661-019-05214-z
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发表时间:
2019
期刊:
Metallurgical and Materials Transactions A
影响因子:
--
通讯作者:
Laughlin, David E.
Laughlin, David E.
中科院分区:
--
文献类型:
--
作者:
Laughlin, David E.

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David E. Laughlin 当相图中包含磁相时,会出现一些不熟悉的特征。大多数磁变换不是一阶相变,因此它们在相图上的描述不必遵循众所周知的构造要求,例如基于吉布斯平衡相规则的构造要求。特别地,从顺磁相到铁磁相的转变应该被指定为与更广为人知的一阶转变不同。转变曲线(居里曲线)不显示两相平衡:而是显示无序(顺磁)相的稳定性极限。在本文中,将介绍和讨论包含此类变换的相图的各种示例。将根据基本热力学原理介绍外部施加的磁场的作用,并将讨论施加的磁场在改变系统(合金)的自由度中所起的作用。
David E. LaughlinWhen magnetic phases are included on phase diagrams some unfamiliar features appear. Most magnetic transformations are not first-order phase transformations and therefore their depictions on phase diagrams do not have to follow the well-known construction requirements such as those based on the Gibbs Equilibrium Phase Rule. In particular, the transformation from a paramagnetic to ferromagnetic phase should be designated differently than those of the more widely known first-order transformations. The transformation curve (Curie curve) does not display a two-phase equilibrium: rather it shows the limit of stability of the disordered (paramagnetic) phase. In this paper, various examples of phase diagrams which include suchtransformationswill be presented and discussed. The role of externally applied magnetic fields will be presented based on fundamental thermodynamic principles and the role that applied magnetic fields play in changing the degrees of freedom of systems (alloys) will be discussed.
DOI: 10.1119/1.1934738
发表时间: 1958-12
影响因子: 0.9
作者:
A. Pippard
通讯作者: A. Pippard
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晶体材料中的磁性:A.P. Cracknell 着,284 页,插图,7 × 10 英寸。佩加蒙出版社,牛津,1975 年。价格,20.00 美元(约 8·60 英镑)。
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