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Applied Physics Letters / Volume 96 / Issue 26 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 96, 262507 (2010); http://dx.doi.org/10.1063/1.3459141 (3 pages)

Nature of short-range ferromagnetic ordered state above TC in double perovskite La2NiMnO6

S. M. Zhou, Y. Q. Guo, J. Y. Zhao, S. Y. Zhao, and L. Shi

Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China

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(Received 6 April 2010; accepted 10 June 2010; published online 30 June 2010)

Magnetic measurements of La2NiMnO6 reveal that its inverse susceptibility exhibits an upward derivation from Curie–Weiss behavior above TC, indicating the presence of a short-range ferromagnetic ordered state. It is suggested that the upward derivation is due to antiferromagnetic interactions arising from anitisite defects, which is supported by the magnetic studies on the samples where the antiferromagnetic interactions are modulated by partially doping La with Sr or by decreasing the sample size. Basing on these results, we propose that the short-range ferromagnetic ordering is induced by antisite defects against long-range ferromagnetic ordering of the Ni/Mn sublattice.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

ferromagnetic materials, magnetic semiconductors, magnetic susceptibility, nickel compounds, short-range order

PACS

  • 75.50.Pp

    Magnetic semiconductors

  • 75.30.Cr

    Saturation moments and magnetic susceptibilities

  • 75.40.-s

    Critical-point effects, specific heats, short-range order

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3459141

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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