V. I. Al’shits

Magnetoplastic effect and spin-lattice relaxation in a dislocation-paramagnetic-center system

A magnetic induction threshold Bc above which the magnetoplastic effect — depinning of dislocations from paramagnetic pinning centers — can be observed in samples placed in a magnetic field is predicted and observed in Al, NaCl, and LiF crystals. The existence of a threshold is associated with the fact that for B<Bc the spin-lattice relaxation time τsl in a dislocation-paramagnetic-center system is less than the time required for spin evolution in a magnetic field resulting in the removal of the spin forbiddenness of an electronic transition that “switches off” the dislocation-pinning-center interaction. It is shown that the threshold field Bc is sensitive to temperature and x-ray irradiation of the samples. A new method for measuring the spin-lattice relaxation time in paramagnetic centers on dislocations is proposed on the basis of the data obtained.

On the effect of a magnetic field on the yield point and kinetics of macroplasticity in LiF crystals

AbstractA strong effect of a static magnetic field B on active deformation kinetics (

Electric stimulation of magnetoplasticity and magnetic hardening in crystals

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Dislocation motion in NaCl crystals under combined loading by electron-beam-produced mechanical and electromagnetic pulses

=const) in LiF crystals is observed. This is a threshold effect with respect to B and

On the nature of the influence of an electric current on the magnetically stimulated microplasticity of Al single crystals

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Effect of a magnetic field on the yield point of NaCl crystals

; it is observed only for B> Bc (B≃0.4 T) and