Peculiarities of the Electron-Dislocation Scattering in Magneto-Transport of Transition Compensated Metals at High Magnetic Fields

The transverse magnetoresistivity of pure tungsten and molybdenum single crystals with resistivity ratios of up to 80,000 was measured in temperature range from 2 to 80 K and in magnetic fields of up to 30 T. The samples have different defect structures and dislocation densities, i.e. they contain dislocation walls formed during crystal growth and isolated dislocations produced by compression and strain under deformation. We studied the peculiarities of the electron-dislocation scattering at high magnetic fields and showed that this scattering mechanism strongly affects the magneto-transport of these transition compensated metals. The dislocation breakdown, i.e. a change of the electron orbit types due to electron scattering by isolated dislocations, was observed. We also propose that an internal static skin effect, i.e. a concentration of a dc-current near dislocation walls, may observed in these crystals.