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Title: Magnetic and Transport Properties of La0.7-xPrxPb0.3 MnO3
Authors: Chen, H. Z.;Young, S. L.;Chen, Y. C.;Horng, Lance;Shi, J. B.
Contributors: 物理學系
Keywords: Colossal magnetoresistance;Ferromagnetic-paramagnetic;Metal-insulator
Date: 2003-05
Issue Date: 2013-02-05T02:18:16Z
Publisher: Elsevier
Abstract: The substitution of Pr on the La site in La1−xPrxPb0.3MnO3 has been studied in order to probe into the physical mechanisms of colossal magnetoresistance (CMR) behavior. The magnetic order changes from a long-range order with x=0.0 to a short-range nature with x=0.7. The ferro-paramagnetic and metal-insulator transition temperature values decrease as Pr content increases. The highest MR ratio value is 16.9% for x=0.0 against 41.6% for x=0.7 in an applied field of . It is suggested that the mean ionic radius of the La-site ions may plays an important role on the CMR effect.
Relation: Physica B: Condensed Matter, 329-333 Part 2: 729-730
Appears in Collections:[物理學系] 期刊論文

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