Resistivity and critical temperature of (La1-xPrx)0.7Ca0.3MnO3

doi:10.1088/1009-1963/15/10/040

中国物理B ›› 2006, Vol. 15 ›› Issue (10): 2427-2430.doi: 10.1088/1009-1963/15/10/040

Resistivity and critical temperature of (La_1-xPr_x)_0.7Ca_0.3MnO₃

刘自信, 白春旭

Department of Physics, Henan Normal University, Xinxiang 453007, China

收稿日期:2005-12-12 修回日期:2006-06-05 出版日期:2006-10-20 发布日期:2006-10-20
基金资助:
Project supported by the National Natural Science Foundation of China(Grant No 60476047) and the Natural Science Foundation of Henan Province (Grant No 0411011700).

Resistivity and critical temperature of (La_1-xPr_x)_0.7Ca_0.3MnO₃

Liu Zi-Xin(刘自信)^† and Bai Chun-Xu(白春旭)

Department of Physics, Henan Normal University, Xinxiang 453007, China

Received:2005-12-12 Revised:2006-06-05 Online:2006-10-20 Published:2006-10-20
Supported by:
Project supported by the National Natural Science Foundation of China(Grant No 60476047) and the Natural Science Foundation of Henan Province (Grant No 0411011700).

摘要/Abstract

摘要： An empirical formula of the critical temperature that is concentration dependent for polycrystalline (La_1-xPr_x)_0.7Ca_0.3MnO₃ is presented in this paper. With this formula, the temperature dependence of resistance is simulated for various values of x by using the random resistor network model and the Monte Carlo method. The hysteresis effect in \rho -- T curves is reasonably explained. The simulation results are in good agreement with the relevant experimental measurements.

关键词: Monte Carlo simulation method, colossal magnetoresistance, phase separation, hysteresis effect

Abstract: An empirical formula of the critical temperature that is concentration dependent for polycrystalline (La_1-xPr_x)_0.7Ca_0.3MnO₃ is presented in this paper. With this formula, the temperature dependence of resistance is simulated for various values of x by using the random resistor network model and the Monte Carlo method. The hysteresis effect in $\rho$ -- T curves is reasonably explained. The simulation results are in good agreement with the relevant experimental measurements.

Key words: Monte Carlo simulation method, colossal magnetoresistance, phase separation, hysteresis effect

中图分类号: (Critical-point effects, specific heats, short-range order)

75.40.-s

75.47.Gk (Colossal magnetoresistance) 75.47.Lx (Magnetic oxides) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)

刘自信, 白春旭. Resistivity and critical temperature of (La_1-xPr_x)_0.7Ca_0.3MnO₃[J]. 中国物理B, 2006, 15(10): 2427-2430.

Liu Zi-Xin(刘自信) and Bai Chun-Xu(白春旭). Resistivity and critical temperature of (La_1-xPr_x)_0.7Ca_0.3MnO₃[J]. Chinese Physics, 2006, 15(10): 2427-2430.

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Resistivity and critical temperature of (La_1-xPr_x)_0.7Ca_0.3MnO₃

Resistivity and critical temperature of (La_1-xPr_x)_0.7Ca_0.3MnO₃

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