Transport properties of a "reverse Kondo alloy" at finite magnetic field: Experiment and theory

Electrical and thermal conductivity and thermoelectric power were theoretically calculated and measured for ($\mathrm{La}$,Gd)${\mathrm{Al}}_2$—a dilute magnetic alloy with ferromagnetic coupling of the Gd spins to the host electrons—between 0.3 and 10 K, and up to 8 T. It turned out that the transport properties at finite field deviate markedly from the zero-field behavior, e.g., in the electrical resistivity (where a steplike transition is found between the high-temperature logarithmic increase and a low-temperature plateau). A theoretical result for the Hall coefficient is also given.