Single crystal EPR spectrum of Cr3+ in lanthanum lutecium gallium garnet |
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Authors: | W. B. Lewis |
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Affiliation: | (1) Los Alamos National Laboratory, P.O. Box 503, 87544 Los Alamos, NM, USA |
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Abstract: | The Cr3+ EPR spectra of YAG type crystals normally consist of four peaks whose positions are dependent on the axial zero-field splitting D with axis along a 111 direction and angle between that direction and the applied field H0. In LLGG only three principal peaks are observed with zero-field axis nearly along x, y or z. This anomaly is attributed to the relatively small size of Cr3+ compared to Lu3+ which it displaces in an octahedral site. D varies slightly for the different zero-field axes: 0.480 cm–1 along x, 0.429 cm–1 along y and 0.470 cm–1 along z. The spectroscopic splitting factor g=1.978±0.001 is essentially isotropic and independent of axes within the experimental error. |
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Keywords: | 76.30.Fc 42.70.Fh 42.55.Rz |
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