Suppression of T-C by overdoped Li in the diluted ferromagnetic semiconductor Li1+y(Zn1-xMnx)P: A mu SR investigation

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	Suppression of T-C by overdoped Li in the diluted ferromagnetic semiconductor Li1+y(Zn1-xMnx)P: A mu SR investigation
	Ning, FL ; Man, HY ; Gong, X ; Zhi, GX ; Guo, SL ; Ding, C ; Wang, Q ; Goko, T ; Liu, L ; Frandsen, BA ; Uemura, YJ ; Luetkens, H ; Morenzoni, E ; Jin, CQ ; Munsie, T ; Luke, GM ; Wang, HD ; Chen, B
刊名	PHYSICAL REVIEW B
	2014
卷号	90 期号:8
ISSN号	1098-0121
通讯作者	Ning, FL (reprint author), Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China.
中文摘要	We use muon spin relaxation (mu SR) to investigate the magnetic properties of a bulk form diluted ferromagnetic semiconductor (DFS) Li-1.15(Zn0.9Mn0.1)P with T-C similar to 22 K. mu SR results confirm the gradual development of ferromagnetic ordering below T-C with a nearly 100% magnetic ordered volume. Despite its low carrier density, the relation between static internal field and Curie temperature observed for Li(Zn,Mn) P is consistent with the trend found in (Ga,Mn)As and other bulk DFSs, indicating these systems share a common mechanism for the ferromagnetic exchange interaction. Li1+y(Zn1-xMnx)P has the advantage of decoupled carrier and spin doping, where Mn2+ substitution for Zn2+ introduces spins and Li+ off-stoichiometry provides carriers. This advantage enables us to investigate the influence of overdoped Li on the ferromagnetic ordered state. Overdoping Li suppresses both T-C and saturation moments for a certain amount of spins, which indicates that more carriers are detrimental to the ferromagnetic exchange interaction, and that a delicate balance between charge and spin densities is required to achieve highest T-C.
资助信息	National Basic Research Program of China [2014CB921203, 2011CBA00103]; NSF of China [11274268]; IOP in Beijing by the NSFC; MOST; Columbia by the U. S. NSF PIRE (Partnership for International Research and Education) [OISE-0968226]; Columbia by the U. S. NSF PIRE [DMR-1105961]; JAEA Reimei Project at IOP, Columbia; PSI; McMaster; NSERC; CIFAR at McMaster
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59517]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Ning, FL,Man, HY,Gong, X,et al. Suppression of T-C by overdoped Li in the diluted ferromagnetic semiconductor Li1+y(Zn1-xMnx)P: A mu SR investigation[J]. PHYSICAL REVIEW B,2014,90(8).
APA	Ning, FL.,Man, HY.,Gong, X.,Zhi, GX.,Guo, SL.,...&Chen, B.(2014).Suppression of T-C by overdoped Li in the diluted ferromagnetic semiconductor Li1+y(Zn1-xMnx)P: A mu SR investigation.PHYSICAL REVIEW B,90(8).
MLA	Ning, FL,et al."Suppression of T-C by overdoped Li in the diluted ferromagnetic semiconductor Li1+y(Zn1-xMnx)P: A mu SR investigation".PHYSICAL REVIEW B 90.8(2014).