The effect of a magnetic field (0.04 to 0.8T) upon the amplitude-dependence of the internal friction in crystals containing various impurities was studied by using a 2-component resonant-oscillator method at a frequency of 80kHz. The state of the samples was controlled in situ from the current–voltage characteristics of a compound oscillator. It was found that the state of the dislocation pinning-center system changed in the presence of a magnetic field. This led to an increase in the internal friction and the plasticity of the samples. The effect of the magnetic field was sensitive to the impurity composition in the crystal.

Effect of Magnetic Field on Dislocation-Induced Unelasticity and Plasticity of LiF Crystals with Various Impurities. N.A.Tyapunina, V.L.Krasnikov, É.P.Belozerova, V.N.Vinogradov: Physics of the Solid State, 2003, 45[1], 98-103