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

Ching Jiun Wu; Jiang Tsu Yu

doi:10.1016/0022-4596(91)90329-G

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

Ching Jiun Wu^*, Jiang Tsu Yu

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Two spin 1 2 paramagnetic species (species I and species II) are detected by electron paramagnetic resonance (EPR) in CrO^2- 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 CrO^3- ₄ species produced by γ-irradiation of the sample crystals. By comparing the thermal treatment behaviors of the CrO^2- ₄-doped Rb₃H(SeO₄)₂ and Cs₃H(SeO₄)₂ crystals, it was established that the electronic defect acquired by the CrO^2- ₄ to form the thermally produced CrO^3- 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.

Original language	English
Pages (from-to)	549-555
Number of pages	7
Journal	Journal of Solid State Chemistry
Volume	93
Issue number	2
DOIs	https://doi.org/10.1016/0022-4596(91)90329-G
Publication status	Published - 1991 Aug

ASJC Scopus subject areas

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

Access to Document

10.1016/0022-4596(91)90329-G

Cite this

@article{634dc1e7ff0f400a8ea37b8ad9ec9334,

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

abstract = "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.",

author = "Wu, {Ching Jiun} and Yu, {Jiang Tsu}",

year = "1991",

month = aug,

doi = "10.1016/0022-4596(91)90329-G",

language = "English",

volume = "93",

pages = "549--555",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

number = "2",

}

TY - JOUR

T1 - EPR of the thermally produced CrO3- 4 in CrO2- 4-doped (NH4)3H(SeO4)2 crystals

AU - Wu, Ching Jiun

AU - Yu, Jiang Tsu

PY - 1991/8

Y1 - 1991/8

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=44949270443&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=44949270443&partnerID=8YFLogxK

U2 - 10.1016/0022-4596(91)90329-G

DO - 10.1016/0022-4596(91)90329-G

M3 - Article

AN - SCOPUS:44949270443

SN - 0022-4596

VL - 93

SP - 549

EP - 555

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

IS - 2

ER -

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

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this