SINGLE-CRYSTAL MAGNETIZATION STUDIES OF DYSB

High resolution magnetization measurements in single crystal-spherical DySb samples have been performed versus T in fields to 23.6 kOe. Measurements with H along principal crystallographic and 〈112〉 directions are interpreted in terms of the intermediate metamagnetic phase having the HoP structure. Magnetization components parallel and perpendicular to the applied field for field rotations in (110) and (111) crystallographic planes have been measured and are interpreted in terms of a simple model with a single critical field. For H ∥ 〈110〉, M and H are collinear. The (M - H - T) phase diagram has been determined for H ∥ 〈110〉. The metamagnetic transition is 1st order below a critical point Pc = (8.5 K, 14.7 kOe) becoming 2nd order above. Field induced order for T > TN is observed in agreement with the results of Brun et al. The absence of hysteresis in M∥(θ) for H in (110) and (111) planes is interpreted as evidence for the tunneling model in DySb. © 1979.