摘要
用固相反应法制备了Y0.5Ca0.5Mn0.8Fe0.2O3多晶陶瓷材料, 借助电子顺磁共振技术对多晶样品在150～300 K温度范围内的顺磁共振行为进行了研究.结果表明样品的顺磁共振线宽ΔHpp和g因子的值随着温度的降低是增加的.线宽的增加是由于随着温度的降低, 样品进入一个长程的反铁磁态, 体系的铁磁关联增强导致的.g因子随温度的降低而增加表明体系的轨道有序是逐渐增强的.
The polycrystalline sample of Y0.5Ca0.5Mn0.8Fe0.2O3 was prepared by a conventional solidstate reaction method. The electron spin resonance behavior of Y0.5Ca0.5Mn0.8Fe0.2O3 within the temperature range of 150 - 300 K was studied experimentally. The experimental results show that the value of the electron paramagnetic resonance linewidth △Hpp and g factor increase as temperature decreases. The observed change in the linewidth in the temperature range below charge ordering temperature Tco can be attributed to the build-up of magnetic correlations preceding the transition to the long-rang antiferromagnetic ordering at low temperature. The g factor increases with decreasing temperature suggests the gradual strengthening of the orbital ordering.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2005年第5期725-727,共3页
Chinese Journal of Rare Metals
