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Experimental verification and quantitative analysis of the temperature (phonon) breakdown phenomenon in the high-field magnetoresistivity of compensated metals

Experimental verification and quantitative analysis of the temperature (phonon) breakdown... The transverse magnetoresistivity of tungsten single crystals with resistivity ratios of up to 80.000 was measured in the temperature range from 4.2 to 60 K and in magnetic fields up to 15 T. The experiments show that the temperature (phonon) breakdown effect occurs in compensated metals as a result of strong electron-phonon scattering. This leads to a transformation of closed electron orbits into quasi-open ones and, consequently, to anomalies of the galvanomagnetic properties. A large anisotropy of the magnetoresistivity (up to 83%), i.e. a dependence of resistivity on current direction, is observed in a cubic crystal. The power index n in the field dependence of the magnetoresistivity decreases and the characteristic intersheet gap temperatures T0, which are determined from an exponential temperature dependence of the magnetoresistivity, “formally” depend on magnetic field. A detailed analysis of the experimental results allows us to explain all these anomalies by the temperature breakdown effect and to obtain new information on this phenomenon in metals at high magnetic fields. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

Experimental verification and quantitative analysis of the temperature (phonon) breakdown phenomenon in the high-field magnetoresistivity of compensated metals

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References (13)

Publisher
Springer Journals
Copyright
Copyright
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/BF00755114
Publisher site
See Article on Publisher Site

Abstract

The transverse magnetoresistivity of tungsten single crystals with resistivity ratios of up to 80.000 was measured in the temperature range from 4.2 to 60 K and in magnetic fields up to 15 T. The experiments show that the temperature (phonon) breakdown effect occurs in compensated metals as a result of strong electron-phonon scattering. This leads to a transformation of closed electron orbits into quasi-open ones and, consequently, to anomalies of the galvanomagnetic properties. A large anisotropy of the magnetoresistivity (up to 83%), i.e. a dependence of resistivity on current direction, is observed in a cubic crystal. The power index n in the field dependence of the magnetoresistivity decreases and the characteristic intersheet gap temperatures T0, which are determined from an exponential temperature dependence of the magnetoresistivity, “formally” depend on magnetic field. A detailed analysis of the experimental results allows us to explain all these anomalies by the temperature breakdown effect and to obtain new information on this phenomenon in metals at high magnetic fields.

Journal

Journal of Low Temperature PhysicsSpringer Journals

Published: Nov 22, 2004

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