Abstract

Magnetization M, specific heat \(C_p\), polarization P and dielectric constant \(\epsilon \) of DyFeWO\(_6\) are investigated for the first time using a microscopic model and the Green’s function technique. The magnetic field dependence of M for temperatures below and above \(T_N\) is observed. \(C_p\) shows an anomaly at the Neel temperature \(T_N\) which disappears by applying an external magnetic field h. P decreases with increasing h. The antiferromagnetic transition in DyFeWO\(_6\) is accompanied by a peak in \(\epsilon \). With increasing magnetic field the peak decreases, shifts to smaller \(T_N\) values, and for strong magnetic fields vanishes. The magnetic field behaviour of P and \(\epsilon \) is an evidence for the multiferroicity of DyFeWO\(_6\). The observed results are in good qualitative agreement with the existing experimental data.

Graphic abstract

中文翻译：

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DyFeWO多铁性的理论研究 $$_6$$ 6

摘要

首次使用微观模型和格林函数技术研究了DyFeWO \(_6\)的磁化M、比热\(C_p\)、极化P和介电常数\(\epsilon \) 。观察到M对低于和高于\(T_N\)的温度的磁场依赖性。\(C_p\)显示了 Neel 温度\(T_N\)处的异常，该异常通过施加外部磁场h消失。P随着h的增加而减小。DyFeWO \(_6\)中的反铁磁跃迁伴随着\(\epsilon \)中的一个峰值。随着磁场的增加，峰值减小，转移到更小的\(T_N\)值，并且对于强磁场消失。P和\(\epsilon \)的磁场行为是 DyFeWO \(_6\)多铁性的证据。观察到的结果与现有的实验数据具有很好的定性一致性。

图形摘要