Publication: The electron spin resonance study of Gd<sup>3+</sup>in natural zircon
Issued Date
2008-02-01
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ISSN
03048853
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2-s2.0-35448963090
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Magnetism and Magnetic Materials. Vol.320, No.3-4 (2008), 479-482
Suggested Citation
A. Mungchamnankit, P. Limsuwan, K. Thongcham, S. Meejoo The electron spin resonance study of Gd<sup>3+</sup>in natural zircon. Journal of Magnetism and Magnetic Materials. Vol.320, No.3-4 (2008), 479-482. doi:10.1016/j.jmmm.2007.07.014 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/19408
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Title
The electron spin resonance study of Gd<sup>3+</sup>in natural zircon
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Abstract
X-band ESR spectra of natural zircon were measured at room temperature with the applied magnetic field parallel and perpendicular to the crystal axis [0 0 1]. Seven resonance absorption peaks of Zeeman interaction are obtained, due to a trace of the Gd3+present in the natural zircon. The ground state of Gd3+,8S7/2give rise to seven resonance absorption peaks under an applied magnetic field. In addition, the weak hyperfine structure lines are observed between adjacent Zeeman lines, due to isotope157Gd3+and155Gd3+. The ESR spectra were also measured at the different rotation angle θ and φ from 0 to 180° with respect to the applied magnetic field. The angular variation of ESR spectra of Gd3+with the applied magnetic field clearly reflected that the crystal field symmetry of the surrounding of Gd3+is D2d, and hence Gd3+substituted Zr4+in the lattice. According to the crystal field, it was shown that the ground state energy level of the Gd3+was split into four doublets. © 2007 Elsevier B.V. All rights reserved.