(La_(0.9)Bi_(0.1))_(2/3)Ca_(1/3)MnO_3磁性和电输运性质研究  

Magnetic and transport properties of(La_(0.9)Bi_(0.1))_(2/3)Ca_(1/3)MnO_3

作　　者：匡安龙[1] 袁宏宽[1] 陈洪[1] 蒋小龙[2] 刘兴忡[2] 路中林[2] 都有为[2] 

机构地区：[1]西南大学物理科学与技术学院,重庆400715 [2]南京大学固体微结构国家重点实验室,江苏南京210093

出　　处：《功能材料》2006年第10期1542-1544,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(10374044)

摘　　要：利用固相反应法制备了(La0.9Bi0.1)2/3Ca1/3MnO3样品,研究了它的导电特性和磁性。在电阻和磁化测量中观察到热滞现象。在电阻-温度(R-T)曲线中出现了两个峰,当施加5T外场时,电阻中的热滞现象被抑制,只观察到一个峰。磁化(M-T)曲线表明,在居里温度(Tc)以下发生了顺磁-铁磁(PM-FM)相变。样品不同寻常的M-T行为能够很好地解释测量到的R-T曲线。（La0.9Bi0.1）2/3Ca1/3MnO3 manganite perovskite was synthesized by solid state reaction and the magnetic and transport properties were measured. A considerable thermal hysteresis in resistance and magnetization has been observed,and two peaks occur in R-T curve. After applied 5 T field,the thermal hysteresis in resistance is suppressed,and only one peak can be observed. The temperature-dependent magnetization （M-T） curve shows that below the paramagnetic-ferromagnetic transition temperature To, a ferromagnetic-canted ferromagnetic transition may occurred. The anomalous temperature-dependent behavior of magnetization may account for the thermal hysteresis of resistance.

关 键 词：(La0.9Bi0.1)2/3Ca1/3MnO3热滞 铁磁-倾斜铁磁(FM—canted FM)相变 

分 类 号：O482[理学—固体物理] TB34[理学—物理]