Ba(Zn,Co)2As2: A diluted ferromagnetic semiconductor with n-type carriers and isostructural to 122 iron-based superconductors

Shengli Guo; Huiyuan Man; Kai Wang; Cui Ding; Yao Zhao; Licheng Fu; Yilun Gu; Guoxiang Zhi; Benjamin A. Frandsen; Sky C. Cheung; Zurab Guguchia; Kohtaro Yamakawa; Bin Chen; Hangdong Wang; Z. Deng; C. Q. Jin; Yasutomo J. Uemura; Fanlong Ning

doi:10.1103/PhysRevB.99.155201

Ba(Zn,Co)2As2: A diluted ferromagnetic semiconductor with n-type carriers and isostructural to 122 iron-based superconductors

Shengli Guo, Huiyuan Man, Kai Wang, Cui Ding, Yao Zhao, Licheng Fu, Yilun Gu, Guoxiang Zhi, Benjamin A. Frandsen, Sky C. Cheung, Zurab Guguchia, Kohtaro Yamakawa, Bin Chen, Hangdong Wang, Z. Deng, C. Q. Jin, Yasutomo J. Uemura, Fanlong Ning

DOI 10.1103/PhysRevB.99.155201 · Physical Review B

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Abstract

We report the successful synthesis of a 122 diluted ferromagnetic semiconductor with n-type carriers, Ba(Zn,Co)2As2. Magnetization measurements show that the ferromagnetic transition occurs up to TC∼45K. Hall effect and Seebeck effect measurements jointly confirm that the dominant carriers are electrons. Through muon spin relaxation, a volume-sensitive magnetic probe, we have also confirmed that the ferromagnetism in Ba(Zn,Co)2As2 is intrinsic and the internal field is static.