Anomalous magnetoresistance in detwinned EuFe2As2

doi:10.1088/1674-1056/ab90e4

Abstract The in-plane magnetotransport of detwinned EuFe₂As₂ single crystal has been investigated. In the antiferromagnetic phase of Eu²⁺ spins, very different magnetoresistance results are observed upon the change of the external magnetic field direction and the current direction. This could be attributed to the tunable orientation of the Eu²⁺ spins under magnetic field. Electron scattering by spin fluctuation, superzone boundary effect, and cyclotron motion of charge carriers are used to interpret the observed anomalous magnetoresistance which is measured by using a current along a direction. The remarkable features of magnetoresistance suggest that itinerant electrons strongly couple with the spin configuration of Eu²⁺, which has a huge influence on the transport properties of EuFe₂As₂.

Keywords: magnetoresistance spin reorientation iron pnictides

Received: 24 April 2020
Revised: 01 May 2020
Accepted manuscript online:

PACS:	75.47.-m	(Magnetotransport phenomena; materials for magnetotransport)
	74.25.-q	(Properties of superconductors)
	73.43.Qt	(Magnetoresistance)

Fund: Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. 2014JJCB27).

Corresponding Authors: Guotai Tan
E-mail: tangt@bnu.edu.cn

Cite this article:

Zhuang Xu(徐状), Junxiang Pan(潘俊香), Zhen Tao(陶镇), Ruixian Liu(刘瑞鲜), Guotai Tan(谈国太) Anomalous magnetoresistance in detwinned EuFe₂As₂ 2020 Chin. Phys. B 29 077402

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Anomalous magnetoresistance in detwinned EuFe₂As₂