Galvanomagnetic properties of super and substoichiometric yttrium dihydrides

Abstract Hall resistance and transverse magnetoresistance measurements were performed under magnetic fields of up to 5 T to reveal the basal characteristics of mobile carriers in near-stoichiometric dihydrides YH 2 + x ( x = - 0.23 and 0.04). Unusually small Hall coefficients, e.g. 9.0 × 10 - 12 m 3 / C for x = - 0.23 , were observed, leading us to the tentative conclusion that f.c.c. YH 2 + x is a compensated metal in which electrons and holes have nearly equal carrier density. In addition, carrier mobility was revealed to be nearly equal for electrons and holes, with a difference of less than 7%.