Low-Symmetry Aspects in EPR Spectra of Mn^{2+} at Bi^{3+} Sites in BiVO_{4} Single Crystal

• Authors: T. Yeom , S. Choh , Cz. Rudowicz
• Languages of publication: EN

Abstracts

EN

Zero-field splitting parameters obtained from EPR X-band experiments of Baran et al. (1985) and Yeom et al. (1992) are reanalyzed. Transformation relations are derived to express the two sets of data in the same axis system. Problems arising from using a truncated zero-field splitting Hamiltonian in fitting the experimental data are elucidated. Low-symmetry aspects in EPR spectra of Mn^{2+} at Bi^{3+} sites in BiVO_{4} single crystal are considered. Good agreement for orthorhombic parameters b^{0}_{2} and b^{2}_{2} is obtained indicating that the centres observed in the two cases are the same Mn centres. The remaining b^{q}_{k} parameters accounting for the actual site symmetry around Mn^{2+} impurity which seems to be lower than orthorhombic in the ferroelastic phase cannot be unambiguously determined from the existing EPR data.

Keywords

EN

75.10.Dg; 76.30.Da; 61.16.Hn; 78.20.Hp

Discipline

• 76.30.Da: Ions and impurities: general
• 75.10.Dg: Crystal-field theory and spin Hamiltonians(see also 71.70.Ch Crystal and ligand fields)

• Journal: Acta Physica Polonica A
• Year: 1992
• Volume: 82
• Issue: 3
• Pages: 503-510

Dates

published

1992-09

received

1992-06-10

Contributors

author

T. Yeom

• Department of Physics, Korea University, Seoul 136-701, Republic of Korea

author

S. Choh

• Department of Physics, Korea University, Seoul 136-701, Republic of Korea

author

Cz. Rudowicz

• Department of Applied Science, City Polytechnic of Hong Kong, Hong Kong

Identifiers

DOI

10.12693/APhysPolA.82.503