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- W2000838091 abstract "Measurements have been made of the temperature dependence of the Hall effect in the range 1-300ifmmode^circelsetextdegreefi{}K, and of the transverse and longitudinal magnetoresistance at low temperatures, in [100] and [111] iron whiskers of high purity (resistance ratios extrapolated to $B=0$ ranged from 242 to 852). Analysis of the Hall data shows that both the ordinary Hall coefficient ${R}_{0}$ and the extraordinary Hall coefficient ${R}_{s}$ vary enormously with temperature, and these variations cannot be explained by existing theories. The theoretical relation ${R}_{s}ensuremath{propto}{ensuremath{rho}}^{2}$, where $ensuremath{rho}$ is the resistivity, does not hold for temperatures below that of liquid nitrogen, and around this temperature ${R}_{0}$, which is positive at room temperature (hole conduction), becomes negative. ${R}_{0}$ and ${R}_{s}$ appear to be isotropic, but at low temperatures these coefficients are extremely sensitive to impurities. The longitudinal magnetoresistance at 4.2ifmmode^circelsetextdegreefi{}K shows a large effect of the domain structure on the electrical resistance, which decreases appreciably (46% for the purest specimen) on magnetizing the specimens to saturation. Small negative magnetoresistance (ensuremath{sim}10%) has also been observed for some specimens in weak transverse fields." @default.
- W2000838091 created "2016-06-24" @default.
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- W2000838091 date "1967-04-10" @default.
- W2000838091 modified "2023-10-02" @default.
- W2000838091 title "Galvanomagnetic Effects in Iron Whiskers" @default.
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- W2000838091 doi "https://doi.org/10.1103/physrev.156.637" @default.
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