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2004

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February

  

Reviews of topical problems


Spin micromechanics in the physics of plasticity


Institute of Solid-State Physics, Russian Academy of Sciences, Chernogolovka, Moscow Region, Russian Federation

The effect of the spin states of structural defects on the mechanical properties of a crystal is the subject of spin micromechanics, a discipline that emerged at the junction of solid state physics, spin chemistry, and plasticity physics. The main reason for considering the electron spin when discussing elementary processes in plastically deformed crystals is the solid experimental evidence of recent years that the multiplicity of excited short-lived defect pairs affects the way in which dislocations (plastic deformation carriers) move in various nonmagnetically ordered crystals. Because the contribution of defect spin states to mechanical properties can basically be found from magnetic field effects on plasticity, the systematization and analysis of recent experimental data on such effects are given the main attention in this review. In interpreting these effects, analogies between the elementary events of a dislocation overcoming an obstacle and the earlier studied spin-dependent processes (charge transfer, light emission, intermolecular chemical bond formation) are employed.

Text can be downloaded in Russian. English translation is available on IOP Science.
PACS: 61.72.−y, 62.20.−x, 75.80.+q (all)
DOI: 10.1070/PU2004v047n02ABEH001683
URL: https://ufn.ru/en/articles/2004/2/c/
Citation: Morgunov R B "Spin micromechanics in the physics of plasticity" Phys. Usp. 47 125–147 (2004)
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Оригинал: Моргунов Р Б «Спиновая микромеханика в физике пластичности» УФН 174 131–153 (2004); DOI: 10.3367/UFNr.0174.200402c.0131

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