Abstract.
Electron spin resonance (ESR) spectra caused by a stable trapped H atom, a Dy3+ ion, and a PO4 unit were observed in X-ray-irradiated dysprosium-doped β-tricalcium phosphate (β-Ca3(PO4)2:Dy, β-TCP:Dy) phosphor. The ESR spectrum of the H atom in the X-ray-irradiated β-TCP:Dy phosphor was slightly different from that of nondoped X-ray-irradiated β-TCP, suggesting that the Dy3+ spin state has a significant effect on the relaxation time of electron spins. The electron spin echo of the H atom was observed in the X-ray-irradiated β-TCP but not in the corresponding X-ray-irradiated β-TCP:Dy phosphor.
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Authors' address: Kouichi Nakashima, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aoba-ku, Sendai 980-8577, Japan
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Nakashima, K., Kakihana, M. & Yamauchi, J. Characterization of X-Ray-Irradiated β-Ca3(PO4)2:Dy by means of ESR Spectroscopy. Appl Magn Reson 33, 37–43 (2008). https://doi.org/10.1007/s00723-008-0054-3
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DOI: https://doi.org/10.1007/s00723-008-0054-3