Superhyperfine interactions in the electron-spin-resonance spectrum of substitutional gd3+ impurity in caf2 single crystals under applied stress
Bowden, Charles M.
Miller, John E.
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In this communication we report a superhyperfine structure in the esr spectrum of 0.001 at. ~0 Gd' in a single crystal of CaF, under applied stress. The stress was applied at the polished (111)face of the CaF, crystal by a thin film of Ge applied as an epitaxy. ' Differential stress was applied to the CaF2 crystal by changing the temperature of the sample.