中国物理B ›› 2015, Vol. 24 ›› Issue (12): 127501-127501.doi: 10.1088/1674-1056/24/12/127501
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
陈红a, 杨旭b, 张培松a, 梁磊a, 洪源泽a, 魏英进b, 陈岗b c, 杜菲b, 王春忠b c
Chen Hong (陈红)a, Yang Xu (杨旭)b, Zhang Pei-Song (张培松)a, Liang Lei (梁磊)a, Hong Yuan-Ze (洪源泽)a, Wei Ying-Jin (魏英进)b, Chen Gang (陈岗)b c, Du Fei (杜菲)b, Wang Chun-Zhong (王春忠)b c
摘要: Spinel LiCoMnO4 is prepared by solid-state reaction and its magnetic properties are comprehensively studied by direct current (DC) and alternating current (AC) susceptibilities, isothermal remanent magnetizations, and magnetic hysteresis. Fitting to the Curie-Weiss law by using high-temperature zero-field-cooled susceptibility confirms a low-spin state of Co3+ with S=0. Both the fitting parameters first increase and then tend to be saturated at high magnetic fields through using isothermal remanent magnetizations, which suggests a spin glass transition at low temperature. AC susceptibility study also supports this conclusion since the frequency dependence of peak position and intensity follows the tendency of a spin glass transition. The origin of the spin-glass transition in LiCoMnO4 might be attributed to a spatial segregation between non-magnetic Co3+ regions and spin glass ordered regions of Mn4+ ions.
中图分类号: (Conductivity phenomena in semiconductors and insulators)