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Magnetic and transport properties of lanthanum perovskites with B-site half doping

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
138
Issue
3
Identifiers
DOI: 10.1016/j.ssc.2006.02.008
Keywords
  • A. Magnetically Ordered Materials
  • D. Electronic Transport
Disciplines
  • Physics

Abstract

Abstract We have synthesized various half doped lanthanum perovskites LaB 0.5 B 0.5 ′ O 3 (BB′=MnV, MnCr, MnCo, MnNi, FeCr, FeMn, FeCo, FeNi) by solid state reaction method. The crystal structure was orthorhombic in all samples, but the magnetic and transport properties showed a large variation with the composition. A ferromagnetic feature was quite strong in the Mn-based perovskites but weak or non-existent in the Fe-based ones. The resistivity of Ni-doped ones was much smaller than those of the others. For all half doped perovskits, remarkably, the temperature dependent transport was well explained by variable range hopping model with different localization lengths.

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