Tunghai University Institutional Repository:Item 310901/23459
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    題名: Magnetic and spin-glass-like behavior of CrO2 nanoparticles
    作者: Wang C.R., Yang D.S., Chen Y.Y., Ho J.C.
    貢獻者: Department of Physics, Tunghai University, Taichung, Taiwan;Fortune Institute of Technology, Kaohsiung, Taiwan;Institute of Physics, Academia Sinica, Taipei, Taiwan;Department of Physics, Wichita State University, Wichita, KS, United States
    日期: 2006
    上傳時間: 2013-06-24T09:07:27Z (UTC)
    摘要: Chromium dioxide CrO2 nanoparticles with size below 4 nm were chemically synthesized. In contrast to the bulk compound, which undergoes a ferromagnetic transition at 390 K, SQUID data of the highly-disordered nanoparticles follow approximately a Curie-Weiss fit. The low temperature specific heat is dominated by a much larger ferromagnetic spin-wave term than that of bulk CrO2. A spin-glass-type transition occurs near 6.5 K, based on the observation of a cusp in the temperature dependence of the ac susceptibility, accompanied by a small specific heat anomaly. ? 2006 American Institute of Physics.
    關聯: AIP Conference Proceedings 850
    顯示於類別:[應用物理學系所] 會議論文

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