红外与毫米波学报2021，Vol.40Issue(4)：490-495,6.DOI:10.11972/j.issn.1001-9014.2021.04.008
太赫兹瞬态光谱研究La0.7Ca0.3MnO3薄膜的温度相关相变
The temperature-dependent phase transition in La0.7Ca0.3MnO3 film probed with terahertz transient spectroscopy
摘要
Abstract
The thermodynamics of La0. 7Ca0. 3MnO3 film by terahertz transient spectroscopy were presented. Thetemperature of metal-insulator phase transition of La0. 7Ca0. 3MnO3 film is observed to occur around 260 K,which is almost the same as that of the ferromagnetic-paramagnetic phase transition. It indicates that the conductivity of the La0. 7Ca0. 3MnO3 film is closely related to the order of magnetic moments in the film. We find the conductivity of the La0. 7Ca0. 3MnO3 film can be reproduced with Drude model at low temperature range from 40 K to 200 K,and Drude-Lorentz model at high temperature region from 210 K to 290 K.关键词
金属-绝缘体相变/铁磁-顺磁相变/太赫兹电导率/La0.7Ca0.3MnO3薄膜Key words
metal-insulator phase transition/ferromagnetic-paramagnetic phase transition/terahertz conductivity/La0.7Ca0.3MnO3 film分类
数理科学引用本文复制引用
李高芳,许艳霞,刘现款,马国宏,高艳卿,崔昊杨,黄志明,褚君浩..太赫兹瞬态光谱研究La0.7Ca0.3MnO3薄膜的温度相关相变[J].红外与毫米波学报,2021,40(4):490-495,6.基金项目
Supported by National Natural Science Foundation of China(11674213,61735010,11647023,61625505),Natural Science Founda-tion of Shanghai(17ZR1411500) （11674213,61735010,11647023,61625505）
