A peculiar topological Hall effect in noncentrosymmetric ternary carbide GdCoC2-Reference-Cited by-同舟云学术

A peculiar topological Hall effect in noncentrosymmetric ternary carbide GdCoC2

Published:2023-08-14 Issue:7 Volume:123 Page:
ISSN:0003-6951
Container-title:Applied Physics Letters
language:en
Short-container-title:

Author:

Xu Yang¹²^ORCID,Ren Wei¹²³^ORCID,Ma Shengcan¹²³^ORCID,Chen Changcai¹²^ORCID,Fang Chunsheng¹²^ORCID,Luo Xiaohua¹²^ORCID,Mo Zhaojun⁴^ORCID

Affiliation:

1. Jiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices/Ganzhou Key Laboratory for Rare Earth Magnetic Functional Materials and Physics, College of Rare Earths, Jiangxi University of Science and Technology 1 , Ganzhou 341000, China

2. National Rare Earth Functional Materials Innovation Center, Jiangxi University of Science and Technology 2 , Ganzhou 341100, China

3. School of Materials Science and Engineering, Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology 3 , Ganzhou 341000, China

4. Ganjiang Innovation Academy, Chinese Academy of Sciences 4 , Ganzhou 341000, China

Abstract

A peculiar topological Hall effect (THE) is reported in a noncentrosymmetric ternary carbide GdCoC2. The GdCoC2 reveals a magnetic ordering transition from paramagnetic to ferromagnetic state at the Curie temperature TC = 15.6 K, followed by a commensurate-incommensurate phase transition at Tt = 14.1 K. Below Tt, the competition between an external magnetic field and magnetic interactions, including the Dzyaloshinskii–Moriya interaction, would give rise to characteristic spin textures with non-zero scalar spin chirality χijk, or even topologically protected spin configurations like skyrmions, for which the exotic spin-charge coupled phenomena are induced. Besides a large negative magnetoresistance (MR) up to ∼−52% at 14 K, a remarkably sharp topological Hall signal is observed with almost no anomalous Hall resistivity below 10 K. The topological Hall resistivity (ρxyT) of GdCoC2 reaches a maximum value of ∼0.23 μΩ cm at 3 K under μ0H = 0.6 T. The mechanism underlying the exceptional THE with relatively large ρxyT value in GdCoC2 is discussed in detail.

Funder

National Natural Science Foundation of China

Leading Talents Program of Jiangxi Provincial Major Discipline Academic and Technical Leaders Training Program

Publisher

AIP Publishing

Subject

Physics and Astronomy (miscellaneous)

Link

https://pubs.aip.org/aip/apl/article-pdf/doi/10.1063/5.0160745/18084495/072402_1_5.0160745.pdf

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