First-order reversal curve of the magnetostructural phase transition in FeTe
First-order reversal curve of the magnetostructural phase transition in FeTe
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DOI：
10.1103/physrevb.95.214402
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发表时间：
2017-06-05
影响因子：
3.7
通讯作者：
Zieve, R. J.
中科院分区：
文献类型：
--
作者：
Frampton, M. K.;Crocker, J.;Zieve, R. J.
我们将一阶反转曲线(FORC)方法应用于Fe1+yTe的磁结构相变。FRC测量揭示了滞后相变的两个特征，即使在传统温度测量仅显示单一相变的样品中也是如此。对于Fe1.13Te，磁场的影响表明，主要特征是结构性的，而较小的、略高的温度转变是磁性的。相比之下，Fe1.03Te具有单一的相变，它对磁场的响应是均匀的，这表明磁性相变和结构相变的耦合更强。我们还引入了单轴应力，它在不改变变换的基本能垒的情况下扩展了分布宽度。这项工作展示了Forc如何帮助解开磁性相变和结构相变在FEFE中的作用。
We apply the first-order reversal curve (FORC) method, adapted from studies of ferromagnetic materials, to the magnetostructural phase transition of Fe1+ y Te. FORC measurements reveal two features in the hysteretic phase transition, even in samples where traditional temperature measurements display only a single transition. For Fe1.13Te, the influence of magnetic field suggests that the main feature is primarily structural while a smaller, slightly higher-temperature transition is magnetic in origin. By contrast, Fe1.03Te has a single transition which shows a uniform response to magnetic field, indicating a stronger coupling of the magnetic and structural phase transitions. We also introduce uniaxial stress, which spreads the distribution width without changing the underlying energy barrier of the transformation. The work shows how FORC can help disentangle the roles of the magnetic and structural phase transitions in FeTe.