Abstract:
A magnetic isotopic effect in the plasticity of diamagnetic crystals is predicted. This effect consists in that the replacement of nonmagnetic isotopic nuclei by magnetic nuclei in ionic crystals (e.g., the introduction of 25Mg2+ or 43Ca2+ in place of 24Mg2+ or 40Ca2+ in NaCl) increases the plasticity of the crystals even in the absence of an external magnetic field. On the contrary, such a replacement in covalent crystals (e.g., the introduction of 29Si into silicon or 13C into diamond) is expected to reduce the plasticity and to produce dislocation strengthening.
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