Affiliation:
1. Department of Applied Physics, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei Province, P. R. China
Abstract
By using a negative-magnetoresistivity scaling deduced from Mott's model, a specific scheme to quantitatively describe in detail the effects of the colossal magnetoresistivity (CMR) is proposed. The field-dependence of the magnetoresistance of the magnetic perovskite La 0.7 Ca 0.3 MnO 3 film is analyzed. The range of error for the value of the Curie temperature is reduced by our calculations. So, the Curie temperature can be determined more precisely. Through analyzing the variation of the field sensitivity (FS) with respect to some physics quantities, the main elements that influence the values of FS are revealed. Finally, the behaviors of the magnetically aligned clusters in the magnetic perovskite La 0.7 Ca 0.3 MnO 3 and Nd 0.52 Sr 0.48 MnO 3 film are investigated and analyzed.
Publisher
World Scientific Pub Co Pte Lt
Subject
Computational Theory and Mathematics,Computer Science Applications,General Physics and Astronomy,Mathematical Physics,Statistical and Nonlinear Physics