Abstract
Measurements of the magnetoresistance and Hall voltage have been made in the high-field region on the metallic fluorite compounds AuAl2, AuGa2, and AuIn2. The results have been compared with those expected from the nearly-free-electron (NFE) model. These compounds are uncompensated. The magnetoresistance measurements in principal planes and directions, with one exception, support the NFE model, but the dimensions of the two-dimensional areas of aperiodic open orbits show pronounced deviations. Hall-effect measurements for B in the 100 and 111 directions indicate significant departures of the real Fermi surface from the NFE model. A proposed empirical model gives much better agreement with Hall-effect, magneto-resistance, and de Haas-van Alphen measurements. In the best AuGa2 crystal, magnetoresistance whiskers have been observed and classified in some detail. The magnetoresistance has been calculated for B in the {100} plane, assuming a constant relaxation time and a model of the fourth electron zone with a topography similar to the NFE Fermi surface.
Original language | English (US) |
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Pages (from-to) | 658-670 |
Number of pages | 13 |
Journal | Physical Review |
Volume | 182 |
Issue number | 3 |
DOIs | |
State | Published - 1969 |
Externally published | Yes |
ASJC Scopus subject areas
- General Physics and Astronomy