La(Zn_1−2xMn_xCu_x)SbO: A new diluted magnetic semiconductor isostructural to 1111-type iron pnictide superconductors

¹ Department of Physics, Zhejiang University - Hangzhou 310027, China
² Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences Beijing 100190, China
³ University of Chinese Academy of Sciences - Beijing 100049, China
⁴ Department of Physics, Hangzhou Normal University - Hangzhou 310016, China
⁵ Collaborative Innovation Center of Advanced Microstructures - Nanjing 210093, China

^(a) ningfl@zju.edu.cn

Received: 28 September 2017
Accepted: 22 January 2018

Abstract

A new diluted magnetic semiconductor La(Zn_1−2xMn_xCu_x)SbO in bulk form has been successfully synthesized. Spins and carriers are introduced by co-doping Mn and Cu into Zn sites of the parent semiconductor LaZnSbO. Doping Mn or Cu alone does not induce magnetic ordering. Only when Mn and Cu are co-doped, can the system undergo a ferromagnetic transition below the Curie temperature . The ferromagnetic La(Zn_1−2xMn_xCu_x)SbO shares the same two-dimensional crystal structure as that of the 1111-type iron pnictide superconductor . A relatively large coercive field of is observed from the iso-thermal magnetization measured at 2 K.