Anomalous magnetoresistance in detwinned EuFe2As2

• 作者: Guotai Tan Junxiang Pan Ruixian Liu Zhen Tao Zhuang Xu
• 来源期刊: 中国物理B（英文版）
• 关键词: magnetoresistance spin reorientation iron pnictides
• 年，卷（期）: 2020,（7）
• 页码范围: 565-572
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab90e4

摘要

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.