The thermal diffusivity measurements have been used to study the magnetic phase transition in Zn0.95Mn0.05O doped by nitrogen. The critical parameters of the ferromagnetic-paramagnetic transition have been obtained through the analysis of the inverse of the thermal diffusivity near the Curie temperature. Taking into account that the inverse of the thermal diffusivity has the same critical behavior as the specific heat, the critical exponent alpha has been determined. The results are consistent with the three-dimensional Heisenberg model for the magnetic phase transition. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3142244]
机构:
Jilin Normal Univ, Inst Condensed State Phys, Siping 136000, Peoples R ChinaJilin Normal Univ, Inst Condensed State Phys, Siping 136000, Peoples R China
Yang, J. H.
Zhao, L. Y.
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Jilin Normal Univ, Inst Condensed State Phys, Siping 136000, Peoples R ChinaJilin Normal Univ, Inst Condensed State Phys, Siping 136000, Peoples R China
Zhao, L. Y.
Zhang, Y. J.
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Jilin Normal Univ, Inst Condensed State Phys, Siping 136000, Peoples R ChinaJilin Normal Univ, Inst Condensed State Phys, Siping 136000, Peoples R China
Zhang, Y. J.
Wang, Y. X.
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Jilin Normal Univ, Inst Condensed State Phys, Siping 136000, Peoples R ChinaJilin Normal Univ, Inst Condensed State Phys, Siping 136000, Peoples R China
Wang, Y. X.
Liu, H. L.
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Jilin Normal Univ, Inst Condensed State Phys, Siping 136000, Peoples R ChinaJilin Normal Univ, Inst Condensed State Phys, Siping 136000, Peoples R China
机构:
Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of SciencesBeijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences
黄万国
成昭华
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Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of SciencesBeijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences