Evidence for a spin-lattice relaxation process with two optical phonons : Mn2 in ZnSReport as inadecuate




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Abstract : We have studied the spin-lattice relaxation behaviour of Mn2+ in cubic ZnS at 9 375 MHz between 80 K and 900 K by measuring the line broadening of the |1-2 1-2> → 1-2 - 1-2> transition. This study shows that for high temperatures T > 273 K the measured spin-lattice relaxation time T1 varies as T-11 = αT 7 I6 θD βsh2 θ o T-1. The first term corresponds to a Raman process associated with the acoustical phonons, the second one arises from the optical phonons distribution. The transition probabilities calculation shows that the contributions from the optical and acoustical phonons are similar.

Keywords : electron spin lattice relaxation II VI semiconductors lattice phonons manganese paramagnetic resonance of iron group ions and impurities zinc compounds





Author: G. Roger C. More C. Blanc

Source: https://hal.archives-ouvertes.fr/



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