Progress of novel diluted ferromagnetic semiconductors with decoupled spin and charge doping:Counterparts of Fe-based superconductors

• 来源期刊: 中国物理B（英文版）
• 关键词: diluted ferromagnetic semiconductors homogenous ferromagnetism muon spin rotation (μSR) nuclear magnetic resonance (NMR)
• 年，卷（期）: 2018,（9）
• 页码范围: 28-36
• 页数: 9页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/9/097502

摘要

Diluted ferromagnetic semiconductors(DMSs)that combine the properties of semiconductors with ferromagnetism have potential application in spin-sensitive electronic(spintronic)devices.The search for DMS materials exploded after the observation of ferromagnetic ordering in Ⅲ-Ⅴ(Ga,Mn)As films.Recently,a series of DMS compounds isostructural to iron-based superconductors have been reported.Among them,the highest Curie temperature TC of 230 K has been achieved in(Ba,K)(Zn,Mn)2As2.However,most DMSs,including(Ga,Mn)As,are p-type,i.e.,the carriers that mediate the ferromagnetism are holes.For practical applications,DMSs with n-type carriers are also advantageous.Very recently,a new DMS Ba(Zn,Co)2As2 with n-type carriers has been synthesized.Here we summarize the recent progress on this research stream.We will show that the homogeneous ferromagnetism in these bulk form DMSs has been confirmed by microscopic techniques,i.e.,nuclear magnetic resonance(NMR)and muon spin rotation(μSR).