Effect of magnetic field on dislocation-induced unelasticity and plasticity of LiF crystals with various impurities |
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| Authors: | N A Tyapunina V L Krasnikov É P Belozerova V N Vinogradov |
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| Institution: | (1) Moscow State University, Vorob’evy gory, Moscow, 119899, Russia;(2) Nekrasov State University, Kostroma, Russia;(3) Kostroma State Technological University, Kostroma, 156005, Russia |
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| Abstract: | The effect of a magnetic field of 0.04–0.8 T on the amplitude dependence of the internal friction in LiF crystals with various impurities is studied using a two-component resonant-oscillator method at a frequency of 80 kHz. The state of the samples was controlled in situ from the current-voltage characteristics of a compound oscillator. It is found that the state of the dislocations-pinning-centers system changes in the presence of a magnetic field; this leads to an increase in the internal friction and plasticity of the samples. The effect of the magnetic field is sensitive to the impurity composition in the crystal. |
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