Anomalies in the Galvanomagnetic Properties of Fe_(1.9)V_(1.1)Al Pseudogap Semiconductors at High Magnetic Fields

摘要

The high-field dependence of the galvanomagnetic properties of Fe_(1.9) V_(1.1)Al compounds was measured in the temperature range from 2.5 to 100 K and in magnetic fields of up to 15 T. We observe that the Hall coefficient decreases with magnetic field, increasingly at low temperatures (2.5-15 K). The magnetoresistivity is negative, but no saturation occurs at fields of up to 15 T. The observed peculiarities of the galvanomagnetic properties can be explained theoretically and confirm that Fe_(1.9)V_(1.1)Al compounds show a pseudogap semiconductor behavior.