Abstract
Electron paramagnetic resonance (EPR) of Cr 3 + doped in ( NH 4 ) 2 Co ( SO 4 ) 2 · 6 H 2 O single crystal has been studied using Q band EPR spectrometer to find spin–lattice relaxation time (SLRT) ( T 1 ) . The observation of resolved chromium spectra at room temperature has been interpreted in terms of random modulation of interaction between trivalent chromium and divalent cobalt ions by SLRT of cobalt ions. The relaxation time of the host is found to be 6.95 × 10 - 12 s using Mitsuma theory and 9.85 × 10 - 15 s using Misra et al. approach at room temperature (300 K). Debye temperature of the host lattice is evaluated using electron spin–lattice relaxation processes. It is found that the Debye temperature of the host is 110 K.
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