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An investigation of the effect of uniaxial stress on the spin-resonance of V_+ in MgO
[摘要] The spin-lattice interaction of V2+ in MgO was measured by applying uniaxial stress and observing the shift in the EPR spectrum. The effect of uniaxial stress is explained by the addition of a spin-lattice Hamiltonian of the form HSL = DijSiSj to the spin Hamiltonian. The Dij tensor is related linearily to the strain by the relation Dij = Gijke eke , where eks is the strain, andGijke is a fourth rank tensor called the magneto-elasticcoupling tensor. Because of the cubic symmetry of MgO, the G tensor has only two independent elements, which weredetermined as G11 = -.4 ± .1 and G44 = -2.1 ± .4 cm-1/unit strain. These values are compared to measurements of the G tensor for Cr3+ in MgO.
[发布日期]  [发布机构] Rice University
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