Magnetoresistance reversals and anomalous Hall effect in Mn3SnC and effects of carbon deficiency

Dan Huang; Hang Li; Xuekui Xi; Jianrong Gao; Yong-Chang Lau; Wenhong Wang

doi:10.1088/1361-648X/aca000

Magnetoresistance reversals and anomalous Hall effect in Mn₃SnC and effects of carbon deficiency

J Phys Condens Matter. 2022 Nov 10;51(2). doi: 10.1088/1361-648X/aca000.

Authors

Dan Huang¹, Hang Li¹, Xuekui Xi¹, Jianrong Gao², Yong-Chang Lau¹, Wenhong Wang³

Affiliations

¹ Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
² Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 110819, People's Republic of China.
³ Tiangong University, Tianjin 300387, People's Republic of China.

PMID: 36327461
DOI: 10.1088/1361-648X/aca000

Abstract

The transport behavior of Mn₃SnC and Mn₃SnC_0.8compounds was investigated. Positive magnetoresistance (MR) and an anomalous Hall effect (AHE) are observed for each compound near respective Curie temperature,T_C. The positive MR is reversed during cooling fromT_Cbut is reentrant at low temperature. A 20% carbon deficiency of Mn₃SnC_0.8enlarges the positive MR atT_Cand shifts the temperatures for MR reversals. Ferromagnetic (FM) resonance measurements reveal that the MR reversals are related to the competition between FM and antiferromagnetic components of Mn atoms in each compound. A sign change of the Hall resistivity is observed during cooling of Mn₃SnC but not for Mn₃SnC_0.8. A scaling analysis suggests that the AHE in each compound is mostly due to an intrinsic contribution and that the intrinsic contribution is decreased by the carbon deficiency in Mn₃SnC_0.8.

Keywords: Mn3SnC; anomalous Hall effect; carbon deficiency; magnetoresistance.