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Electron Paramagnetic Resonance of Cr4+ in Yx2SiO5

Published online by Cambridge University Press:  10 February 2011

Rakhim R. Rakhimov ,
Holli D. Horton  and
George B. Loutts
Rakhim R. Rakhimov
Affiliation:
Center for Materials Research, Norfolk State University, Norfolk, VA 23504, USA
Holli D. Horton
Affiliation:
Center for Materials Research, Norfolk State University, Norfolk, VA 23504, USA
George B. Loutts
Affiliation:
Center for Materials Research, Norfolk State University, Norfolk, VA 23504, USA
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Abstract

Chromium-doped yttrium orthosilicate Cr:Y2SiO5 was studied by electron paramagnetic resonance (EPR) method at 9.5–9.7 GHz. EPR transitions were observed for Cr4+ substituting Si4+ in tetrahedral sites of Y2SiO5, and orientation dependence of the single crystal EPR spectrum was studied. The ground state of Cr4+ (electron configuration 3d2) in Y2SiO5 is a spin triplet (S = 1). Rhombic symmetry of the electron magnetic dipole-dipole interaction (zero field splitting) leads to three electron spin terms Tx, Ty and Tz in the absence of the external magnetic field. We have observed the magnetically induced anti-crossing of the terms Ty and Tz.We show that in the vicinity of energy level anti-crossing the linewidths and positions of the resonance lines depend on temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 560: Symposium E – Luminescent Materials , 1999 , 197
Copyright
Copyright © Materials Research Society 1999

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References

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