EPR of the thermally produced CrO3- 4 in CrO2- 4-doped (NH4)3H(SeO4)2 crystals

Ching Jiun Wu*, Jiang Tsu Yu


研究成果: 雜誌貢獻期刊論文同行評審

4 引文 斯高帕斯(Scopus)


Two spin 1 2 paramagnetic species (species I and species II) are detected by electron paramagnetic resonance (EPR) in CrO2- 4-doped (NH4)3H(SeO4)2 single crystals, after the host crystals had been heated to temperatures well below their decomposition temperature. When heat treated at lower temperatures ({reversed tilde equals}90°C), only one species (species I) was detected by EPR. The EPR spectrum of this species was identical to that of the CrO3- 4 species produced by γ-irradiation of the sample crystals. By comparing the thermal treatment behaviors of the CrO2- 4-doped Rb3H(SeO4)2 and Cs3H(SeO4)2 crystals, it was established that the electronic defect acquired by the CrO2- 4 to form the thermally produced CrO3- 4 (I) originates from the NH+ 4 group. It is difficult to determine with certainty from the g-values alone the identity of species II. This species could be a CrO- 3 or a Cr5+ ion.

頁(從 - 到)549-555
期刊Journal of Solid State Chemistry
出版狀態已發佈 - 1991 8月

ASJC Scopus subject areas

  • 電子、光磁材料
  • 陶瓷和複合材料
  • 凝聚態物理學
  • 物理與理論化學
  • 無機化學
  • 材料化學


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