摘要
通过对样品La0.3Ca0.7Mn1–xVxO3(x=0.05,0.10,0.134,0.20)的磁化强度–温度(magnetization–temperature,M–T)曲线、电阻率–温度(resistivity–temperature,ρ–T)曲线、电子自旋共振谱的测量,研究了Mn位V掺杂对La0.3Ca0.7MnO3体系电荷序和自旋序的影响。结果表明:当0.05≤x≤0.134时,体系存在电荷有序(CO)相,体系自旋序随温度降低发生顺磁(paramagnetism,PM)–电荷有序(charge ordering,CO)–反铁磁(antiferromagnetism,AFM)变化。当x=0.20时,电荷有序融化,体系出现再入型自旋玻璃行为。
Influence of V doping at Mn-site on charge order and spin order of the La0.3Ca0.7MnO3 system was studied by measurements of the magnetization-temperature (M-T) and resistivity-temperature (p-T) curves of La0.3Ca0.7Mn1-xVxO3 samples (x=0.05, 0.10, 0.134, and 0.20) and the electron spin resonance spectra. The results show that when 0.05≤x≤0.134, charge ordering (CO) phase exists in the system, and the spin order of the system exhibits the change of paramagnetism (PM)-charge ordering (CO)-antiferromagnetism (AFM) with decrease of temperature. When x=0.20, the charge ordering dissipates, and the system exhibits second-entering-type spin glass behavior.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2008年第6期760-764,共5页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金重点(19934003)
国家重点基础研究发展规划(001CB610604)
安徽省教育厅自然科学研究(2006KJ266B)
安徽省教育厅自然科学研究重大(ZD2007003–1)资助项目
关键词
电荷序
自旋序
再入型自旋玻璃行为
charge ordering
spin order
second-entering-type spin glass behavior