Charge order and spin order in Nd_(0.5)Sr_(0.5)Mn_(1-x)(Ga_x, Ti_x)O_3 system

作     者：REN QingBao1,2, ZHU WeiTing1, HONG Bo2 & ZHANG YuHeng2 1 Department of Physics, Lishui University, Lishui 323000, China 2 National High Magnetic Field Laboratory, University of Science and Technology of China, Hefei 230026, China 

作者机构：department of physics lishui university lishui 323000 China Korea Green Cross Corporation 227 Kugal-ri Kiheung-up YonginKyunggi-do 449-900Korea 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2007年第50卷第3期

页      面：294-302页

核心收录：

学科分类：07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 070205[理学-凝聚态物理] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China (Grant No.10334090) National Basic Research Program of China (Grant No.001CB610604) the Natural Science Foundation of Zhejiang Province, China (Grant No.Y606128) 

主　　题：charge ordering spin ordering antiferromagnetic transition 

摘      要：Magnetic properties of Nd_(0.5)Sr_(0.5)Mn_(1-x)(Ga_x, Ti_x)O_3 system (0.04≤x≤0.4) were inves- tigated through magnetization and electron spin resonance (ESR) measurements. It was observed that a small amount of Ti substitution for Mn will destroy the charge-ordering (CO) phase completely and induce the cluster-spin-glass phase in the system, which displays a procedure of collapse of CO and of an enhancement of spin ordering (SO) phase. In contrast, the Ga substitution for Mn induces a melt- ing of CO phase in the system. It was observed that with substitution the CO phase is suppressed gradually and the remanent CO phase is retained all the while, and withal, there is a co-existence of AFM CO phase and FM SO at low temperature. In addition, an abrupt rise of magnetization was observed in M-T curves. We attributed this abnormal phenomenon to a transition from canted AFM SO to FM SO in CO region.