Field-induced magnetic phase transitions and the resultant giant anomalous Hall effect in the antiferromagnetic half-Heusler compound DyPtBi
Field-induced magnetic phase transitions and the resultant giant anomalous Hall effect in the antiferromagnetic half-Heusler compound DyPtBi
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DOI：
10.1103/physrevb.102.094424
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发表时间：
2020-09
影响因子：
3.7
通讯作者：
H. Zhang;Y. L. Zhu;Y. Qiu;W. Tian;H. Cao;Z. Mao;X. Ke
中科院分区：
文献类型：
--
作者：
H. Zhang;Y. L. Zhu;Y. Qiu;W. Tian;H. Cao;Z. Mao;X. Ke
我们报告了反铁磁 DyPtBi 的场感磁相变和输运特性。我们发现 DyPtBi 在两种不同的磁性基态之间保持着微妙的平衡，这可以通过适度的磁场来控制。此外，它在场诱导的I型自旋结构中表现出巨大的反常霍尔效应（\sigma_A=1540 (ohm cm)^{-1},\theta_{AHE} = 24%），这可能归因于与避免费米能量附近的带交叉和/或非零自旋手性相关的贝里曲率的增强。后一种机制使 DyPtBi 在具有面心立方晶格的反铁磁体中罕见地实现了反铁磁体中的反常霍尔效应，该效应在 [Physical Review Letters 87, 116801 (2001)] 中提出。
We report field-induced magnetic phase transitions and transport properties of antiferromagnetic DyPtBi. We show that DyPtBi hosts a delicate balance between two different magnetic ground states, which can be controlled by a moderate magnetic field. Furthermore, it exhibits giant anomalous Hall effect (\sigma_A=1540 (ohm cm)^{-1},\theta_{AHE} = 24%) in a field-induced Type-I spin structure, presumably attributed to the enhanced Berry curvature associated with avoided band-crossings near the Fermi energy and / or non-zero spin chirality. The latter mechanism points DyPtBi towards a rare potential realization of anomalous Hall effect in an antiferromagnet with face-center-cubic lattice that was proposed in [Physical Review Letters 87, 116801 (2001)].