Magnetoplasticity and magnetic memory in diamagnetic solids |
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Authors: | R B Morgunov and A L Buchachenko |
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Institution: | 1.Institute of Problems of Chemical Physics,Russian Academy of Sciences,Chernogolovka, Moscow oblast,Russia |
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Abstract: | A mechanism for the depinning of dislocations pinned by a stopper is formulated. This mechanism includes the transfer of an
electron from a dislocation to the stopper and the appearance of a spin two-electron nanoreactor that has no Coulomb interaction
that would hold the dislocation at the stopper in the initial state. The spin dynamics in the nanoreactor is controlled by
a magnetic field; therefore, it causes magnetoplasticity and short-term magnetic memory. Another origin of magnetoplasticity
is the aggregation of diffusing paramagnetic ions (stoppers) into dimers, trimers, and clusters; this aggregation is also
spin-selective and magnetically sensitive. The magnetic-field dependence of the structural evolution of the stoppers provides
long-term magnetic memory in diamagnetic solids. Both mechanisms of magnetoplasticity and magnetic memory can coexist and
be independent of or dependent on each other. |
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Keywords: | |
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