THE BEHAVIORS OF THE MAGNETICALLY ALIGNED CLUSTER AND THE MAGNETORESISTANCE IN THE DOPED MANGANITE COMPOUNDS

Shi-Wei Ren ()
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Shi-Wei Ren: Department of Applied Physics, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei Province, P. R. China

International Journal of Modern Physics C (IJMPC), 2005, vol. 16, issue 04, 561-570

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 perovskiteLa0.7Ca0.3MnO3film 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 ofFSare revealed. Finally, the behaviors of the magnetically aligned clusters in the magnetic perovskiteLa0.7Ca0.3MnO3andNd0.52Sr0.48MnO3film are investigated and analyzed.

Keywords: CMR; manganese oxide; the magnetically aligned cluster; 75.70.Pa; 73.50.Jt; 75.70.Ak (search for similar items in EconPapers)
Date: 2005
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DOI: 10.1142/S0129183105007297

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