The temperature-dependent phase transition in La0.7Ca0.3MnO3 film probed with terahertz transient spectroscopy

Gao Fang Li; Yan Xia Xu; Xian Kuan Liu; Guo Hong Ma; Yan Qing Gao; Hao Yang Cui; Zhi Ming Huang; Jun Hao Chu

doi:10.11972/j.issn.1001-9014.2021.04.008

The temperature-dependent phase transition in La_0.7Ca_0.3MnO₃ film probed with terahertz transient spectroscopy

Gao Fang Li
, Yan Xia Xu
, Xian Kuan Liu
, Guo Hong Ma^*
, Yan Qing Gao
, Hao Yang Cui
, Zhi Ming Huang^*
, Jun Hao Chu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The thermodynamics of La_0.7Ca_0.3MnO₃ film by terahertz transient spectroscopy were presented. The temperature of metal-insulator phase transition of La_0.7Ca_0.3MnO₃ 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 La_0.7Ca_0.3MnO₃ film is closely related to the order of magnetic moments in the film. We find the conductivity of the La_0.7Ca_0.3MnO₃ 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.

Translated title of the contribution	太赫兹瞬态光谱研究La_0.7Ca_0.3MnO₃薄膜的温度相关相变
Original language	English
Pages (from-to)	490-495
Number of pages	6
Journal	Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves
Volume	40
Issue number	4
DOIs	https://doi.org/10.11972/j.issn.1001-9014.2021.04.008
State	Published - Aug 2021
Externally published	Yes

Keywords

Ferromagnetic-paramagnetic phase transition
LaCaMnO film
Metal-insulator phase transition
Terahertz conductivity

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10.11972/j.issn.1001-9014.2021.04.008

Cite this

@article{9627b01df4064ac78a854809026f0260,

title = "The temperature-dependent phase transition in La0.7Ca0.3MnO3 film probed with terahertz transient spectroscopy",

abstract = "The thermodynamics of La0.7Ca0.3MnO3 film by terahertz transient spectroscopy were presented. The temperature 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.",

keywords = "Ferromagnetic-paramagnetic phase transition, LaCaMnO film, Metal-insulator phase transition, Terahertz conductivity",

author = "Li, \{Gao Fang\} and Xu, \{Yan Xia\} and Liu, \{Xian Kuan\} and Ma, \{Guo Hong\} and Gao, \{Yan Qing\} and Cui, \{Hao Yang\} and Huang, \{Zhi Ming\} and Chu, \{Jun Hao\}",

year = "2021",

month = aug,

doi = "10.11972/j.issn.1001-9014.2021.04.008",

language = "英语",

volume = "40",

pages = "490--495",

journal = "Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves",

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publisher = "Chinese Optical Society",

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TY - JOUR

T1 - The temperature-dependent phase transition in La0.7Ca0.3MnO3 film probed with terahertz transient spectroscopy

AU - Li, Gao Fang

AU - Xu, Yan Xia

AU - Liu, Xian Kuan

AU - Ma, Guo Hong

AU - Gao, Yan Qing

AU - Cui, Hao Yang

AU - Huang, Zhi Ming

AU - Chu, Jun Hao

PY - 2021/8

Y1 - 2021/8

N2 - The thermodynamics of La0.7Ca0.3MnO3 film by terahertz transient spectroscopy were presented. The temperature 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.

AB - The thermodynamics of La0.7Ca0.3MnO3 film by terahertz transient spectroscopy were presented. The temperature 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.

KW - Ferromagnetic-paramagnetic phase transition

KW - LaCaMnO film

KW - Metal-insulator phase transition

KW - Terahertz conductivity

UR - https://www.scopus.com/pages/publications/85114666009

U2 - 10.11972/j.issn.1001-9014.2021.04.008

DO - 10.11972/j.issn.1001-9014.2021.04.008

M3 - 文章

AN - SCOPUS:85114666009

SN - 1001-9014

VL - 40

SP - 490

EP - 495

JO - Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves

JF - Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves

IS - 4

ER -

The temperature-dependent phase transition in La_0.7Ca_0.3MnO₃ film probed with terahertz transient spectroscopy

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Keywords

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