2019/03/07 by V. I. Alshits, Vladimir I. Alshits, Alshits, Vladimir I. +11
Computer Science · Engineering · Physics and Astronomy · #Electromagnetic Effects on Materials #FOS: Physical sciences #Geotechnical and Geomechanical Engineering #Materials Science (cond-mat.mtrl-sci) #Thoreau and American Literature #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.1903.03013
9 pages, 5 figures, 20 references
arxiv created 2019/03/07 · openalex publication_date 2019/03/07 · arxiv updated 2019/03/08 · openalex created_date 2019/03/22 · openalex updated_date 2026/07/28
The strong geomagnetic influences on mechanical properties of crystals due to their exposure to ultralow crossed magnetic fields, the Earth's field (approx. 50 microTesla) and the AC field (approx. 3 microTesla) in the electron paramagnetic resonance scheme, are discussed. Resonance relaxation displacements of dislocations in NaCl crystals are found both for a harmonic pump field and for a pulse AC field of resonance duration approx. 0.5 microsec. Resonant changes have been also detected in the microhardness of ZnO, triglycine sulfate, and potassium acid phthalate crystals after their exposure in the same EPR scheme. The both effects manifest new strongly anisotropic properties. In particular, the frequency of the resonance is very sensitive to the mutual orientation of the sample and the Earth's field. Physical mechanisms and practical significance of the phenomenon are discussed.