Coupled electronic and magnetic relaxation in Fe1+ yTe: direct evidence for the interaction between itinerant carriers and local moments

B Qian; J Y Liu; F M Zhang; F J Kong; W Zhou; Q C Gu; Y Fang; Z D Han; X F Jiang; Y L Zhu; Y Wang; J Hu; Z Q Mao

doi:10.1088/1361-648X/ac2db9

Coupled electronic and magnetic relaxation in Fe_{1+ y}Te: direct evidence for the interaction between itinerant carriers and local moments

J Phys Condens Matter. 2021 Oct 28;34(2). doi: 10.1088/1361-648X/ac2db9.

Authors

B Qian^{1

2}, J Y Liu², F M Zhang¹, F J Kong¹, W Zhou¹, Q C Gu¹, Y Fang¹, Z D Han¹, X F Jiang¹, Y L Zhu², Y Wang², J Hu^{2

3}, Z Q Mao²

Affiliations

¹ Advanced Functional Materials Lab and Department of Physics, Changshu Institute of Technology, Changshu 215500, People's Republic of China.
² Department of Physics and Engineering Physics, Tulane University, New Orleans, Louisiana 70118, United States of America.
³ Department of Physics, University of Arkansas, Fayetteville, AR 72701, United States of America.

PMID: 34619673
DOI: 10.1088/1361-648X/ac2db9

Abstract

Iron chalcogenides are of particular interests among iron-based superconductors due to their distinct properties such as high-T_con FeSe monolayer and competing magnetic correlations in Fe_1+yTe. Here we report unusual transport properties observed near the critical composition of Fe_1+yTe (y∼ 0.09) where competing magnetic correlations exist. The resistivity exhibits surprising temperature-dependent relaxation behavior belowT_N, resulting in the increase of resistivity with time for 35 K <T<T_N, but the decrease of resistivity with time for 10 K <T< 35 K. Such resistivity relaxation is intimately coupled to the magnetization relaxation and can be attributed to the glassy magnetic states induced by the competing magnetic orders. These findings demonstrate strong coupling between itinerant carriers and local ordered moments in Fe_1+yTe.

Keywords: Fe1+y Te; magnetization; superconductivity.