Abstract
Three generation modes have been experimentally revealed for impurity-vacancy Eu2+ dimers with the atomic structure determined by the spin-selective transitions to equilibrium configurations in a constant magnetic field of 5–15 T in NaCl: Eu crystals. It has been shown that, under conditions of linearly increasing mechanical stresses, the plastic strain of the NaCl: Eu crystals accelerates the aggregation of impurities and generates magnetically sensitive dimers several tens of times more rapidly than in the case of diffusion-controlled aggregation. Under conditions of linearly increasing strains, magnetically sensitive dimers arise as a result of the destruction of impurity precipitates by moving dislocations. The identification of dimers and the determination of their average spin in the process of spin-dependent reorganization of the atomic structure of the dimers have been performed using optical spectroscopy and SQUID magnetometry.
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Original Russian Text © R.B. Morgunov, 2011, published in Fizika Tverdogo Tela, 2011, Vol. 53, No. 4, pp. 733–744.
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Morgunov, R.B. Generation modes of Eu2+ nonequilibrium dimers and influence of a magnetic field on their reconstruction in NaCl: Eu crystals. Phys. Solid State 53, 786–798 (2011). https://doi.org/10.1134/S1063783411040263
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DOI: https://doi.org/10.1134/S1063783411040263