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arXiv 2212.02129cond-mat.mtrl-scicond-mat.mes-hall
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Mn$_3$NiN薄膜中的反常能斯特效应

Anomalous Nernst effect in Mn$_3$NiN thin films

Sebastian Beckert, João Godinho, Freya Johnson, Jozef Kimák, Eva Schmoranzerová, Jan Zemen, Zbyněk Šobáň, Kamil Olejník, Jakub Železný, Joerg Wunderlich, Petr N… 展开作者

Sebastian Beckert, João Godinho, Freya Johnson, Jozef Kimák, Eva Schmoranzerová, Jan Zemen, Zbyněk Šobáň, Kamil Olejník, Jakub Železný, Joerg Wunderlich, Petr Němec, Dominik Kriegner, Andy Thomas, Sebastian T. B. Goennenwein, Lesley F Cohen, Helena Reichlová

AI总结:

本文研究了反铁磁反钙钛矿Mn$_3$NiN薄膜中的反常能斯特效应,通过同一样品测量反常霍尔和能斯特效应并量化相关系数,结合有限元建模验证了实验结果。

摘要:

在磁化强度消失的磁性材料中观察到显著的霍尔效应,重新激发了人们对理解和调控这一现象的兴趣。反铁磁反钙钛矿是一类新兴的材料,由于复杂的电子能带结构和磁有序,展现出各种有趣的性质。然而,关于这类材料中反常能斯特效应及其大小的报道非常有限。这种稀缺性可能部分源于可靠量化反常能斯特系数的实验困难。在此,我们报告了反铁磁反钙钛矿Mn$_3$NiN薄膜中反常能斯特效应的实验研究。使用相同的样品和测量几何结构测量反常霍尔和能斯特效应,使得直接比较这两种效应并量化Mn$_3$NiN中的反常能斯特系数和电导率成为可能。我们仔细评估了样品中温度梯度的空间分布,并使用有限元建模来证实我们的实验结果。

英文摘要:

The observation of a sizable anomalous Hall effect in magnetic materials with vanishing magnetization has renewed interest in understanding and engineering this phenomenon. Antiferromagnetic antiperovskites are one of emerging material classes that exhibit a variety of interesting properties owing to a complex electronic band structure and magnetic ordering. Reports on the anomalous Nernst effect and its magnitude in this class of materials are, however, very limited. This scarcity may be partly due to the experimental difficulty of reliably quantifying the anomalous Nernst coefficient. Here, we report experiments on the anomalous Nernst effect in antiferromagnetic antiperovskite Mn$_3$NiN thin films. Measurement of both the anomalous Hall and Nernst effects using the same sample and measurement geometry makes it possible to directly compare these two effects and quantify the anomalous Nernst coefficient and conductivity in Mn$_3$NiN. We carefully evaluate the spatial distribution of the thermal gradient in the sample and use finite element modeling to corroborate our experimental results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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