強磁場中熱分解法によって作製した炭素系強磁性体の結晶構造および磁気特性

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  • Crystal Structure and Magnetic Properties of the Carbon-based Ferromagnet Prepared by Pyrolytic Method under High Magnetic Field
  • キョウジバ チュウ ネツ ブンカイホウ ニ ヨッテ サクセイ シタ タンソケイ キョウジセイタイ ノ ケッショウ コウゾウ オヨビ ジキ トクセイ

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We have prepared the carbon-based ferromagnets by pyrolytic method under high magnetic field and investigated their crystal structure and magnetic properties. The crystal structure was measured by the synchrotron X-ray diffraction experiment. The diffraction peak of a diamond was observed for the ferromagnetic samples. Thus, the carbon-based ferromagnet can be attributed to the ferromagnetic ordering of radical spins generated by defects in the diamond structure. And, the diffraction peak of a diamond of the ferromagnetic samples increased with the applied magnetic field in sample preparation. Therefore, the magnetic field may help to form a three dimensional ferromagnetic structure in the carbon-based ferromagnet. The highest magnetization was 3.0 emu/g at 300 K for the sample prepared under magnetic field at 6 T.

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