Abstract An empirical formula of the critical temperature that is concentration dependent for polycrystalline (La1-xPrx)0.7Ca0.3MnO3 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.
Received: 12 December 2005
Revised: 05 June 2006
Accepted manuscript online:
PACS:
75.40.-s
(Critical-point effects, specific heats, short-range order)
(Magnetization curves, hysteresis, Barkhausen and related effects)
Fund: Project supported by the National Natural Science Foundation of China(Grant No 60476047) and the Natural Science Foundation of Henan Province (Grant No 0411011700).
Cite this article:
Liu Zi-Xin(刘自信) and Bai Chun-Xu(白春旭) Resistivity and critical temperature of (La1-xPrx)0.7Ca0.3MnO3 2006 Chinese Physics 15 2427
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