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: 雜誌貢獻文章同行評審

4 引文 斯高帕斯(Scopus)

摘要

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.

原文英語
頁(從 - 到)549-555
頁數7
期刊Journal of Solid State Chemistry
93
發行號2
DOIs
出版狀態已發佈 - 1991 八月

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

指紋 深入研究「EPR of the thermally produced CrO<sup>3-</sup> <sub>4</sub> in CrO<sup>2-</sup> <sub>4</sub>-doped (NH<sub>4</sub>)<sub>3</sub>H(SeO<sub>4</sub>)<sub>2</sub> crystals」主題。共同形成了獨特的指紋。

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