Magnetic field response of NaCl:Eu crystal plasticity due to spin-dependent Eu2+ aggregationстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 8 февраля 2015 г.
Аннотация:Magnetic field impulse 7 T amplitude 10 ms duration was found to affect microhardness of NaCl:Eu
crystals at room temperature. Dimers pairs of Eu2+ paramagnetic ions were shown to be responsible for the
crystal softening induced by magnetic field. Theoretical treatment of the magnetoplastic effect based on the
spin dependence of processes resulting in transformation of the dimers in crystals is developed and applied to
the description of the long-term magnetic memory. Activation energies of the dimer formation, E1
=0.230.04 eV and decomposition, E2=0.330.06 eV were extracted from thermoactivation analysis of
magnetic field controlled Eu2+ aggregation in 77–473 K temperature range.