Griffiths阶段及其EPR方法研究

IF 1.1 4区物理与天体物理 Q4 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL

Applied Magnetic Resonance Pub Date : 2025-03-20 DOI:10.1007/s00723-025-01755-2

R. M. Eremina

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引用次数: 0

摘要

在系统中存在无序和自旋涨落的情况下，格里菲斯相在各种磁性中形成。在本文中，我们提出了从磁化、EPR和SANS光谱的温度依赖性观察到格里菲斯相的实验事实；我们提出了一个描述各向异性场的方程，它实际上是由共振磁场的EPR角依赖关系得到的，并给出了一个确定磁化描述的临界指数的公式。介绍了锰镧中Griffiths相的观测特点。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The Griffiths Phase and its Study by the EPR Method

The Griffiths phase forms in various magnetics in the presence of disorder and spin fluctuations in the system. In this paper, we present experimental facts in which the Griffiths phase is observed from the temperature dependence of magnetization, EPR, and SANS spectra; we present an equation describing the anisotropy fields, which are actually found from the EPR angular dependence of the resonance magnetic field and a formula for determining the critical exponent for magnetizations description. The features of the observation of the Griffiths phase in lanthanum manganites are presented.

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来源期刊

Applied Magnetic Resonance 物理-光谱学

CiteScore

1.90

自引率

10.00%

发文量

审稿时长

2.3 months

期刊介绍： Applied Magnetic Resonance provides an international forum for the application of magnetic resonance in physics, chemistry, biology, medicine, geochemistry, ecology, engineering, and related fields. The contents include articles with a strong emphasis on new applications, and on new experimental methods. Additional features include book reviews and Letters to the Editor.