在受挫磁体 EuCd2 中磁过渡场增强的拓扑霍尔效应

IF 3.7 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review B Pub Date : 2024-07-29 DOI:10.1103/physrevb.110.035159

S. Nishihaya, Y. Watanabe, M. Kriener, A. Nakamura, M. Uchida

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引用次数: 0

摘要

磁体的拓扑自旋纹理产生的新兴磁场会导致巡回载流子产生额外的霍尔响应，这就是拓扑霍尔效应（THE）。拓扑霍尔效应作为一种体效应已被广泛研究，而由磁畴边界（DB）驱动的拓扑霍尔效应却一直难以捉摸。在这里，我们报告了 EuCd2 薄膜中以多峰值结构和滞后环为特征的丰富霍尔响应，其中 Eu 层形成了海森堡自旋的几何挫折晶格。我们发现了在磁过渡场中急剧增强的 THE 分量，这表明可能在 DBs 上形成的非偶数自旋纹理做出了巨大贡献。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Topological Hall effect enhanced at magnetic transition fields in a frustrated magnet EuCd2

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Topological Hall effect enhanced at magnetic transition fields in a frustrated magnet EuCd2

Emergent magnetic fields exerted by topological spin textures of magnets lead to an additional Hall response of itinerant carriers called the topological Hall effect (THE). While THE as a bulk effect has been widely studied, THE driven by magnetic domain boundaries (DBs) has been elusive. Here, we report rich Hall responses characterized by multiple peak structures and a hysteresis loop in films of

{EuCd}_{2}

, where Eu layers form a geometrically frustrated lattice of Heisenberg spins. We uncover a THE component sharply enhanced at magnetic transition fields, indicating a giant contribution from nontrivial spin textures possibly formed at the DBs.

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来源期刊

Physical Review B 物理-物理：凝聚态物理

CiteScore

6.70

自引率

32.40%

发文量

审稿时长

3.0 months

期刊介绍： Physical Review B (PRB) is the world’s largest dedicated physics journal, publishing approximately 100 new, high-quality papers each week. The most highly cited journal in condensed matter physics, PRB provides outstanding depth and breadth of coverage, combined with unrivaled context and background for ongoing research by scientists worldwide. PRB covers the full range of condensed matter, materials physics, and related subfields, including: -Structure and phase transitions -Ferroelectrics and multiferroics -Disordered systems and alloys -Magnetism -Superconductivity -Electronic structure, photonics, and metamaterials -Semiconductors and mesoscopic systems -Surfaces, nanoscience, and two-dimensional materials -Topological states of matter