Field-induced transitions in DySb

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Abstract
The NaCl‐structured compound DySb, which in zero field transforms abruptly at T N ?9.5 K to a Type‐II antiferromagnetic (A) state with a nearly tetragonal lattice distortion, was previously found to exhibit rapid field‐induced changes in magnetization at 1.5 K. The field‐induced transitions in a DySb crystal have been studied by neutron diffraction and magnetization measurements in fields up to ∠60 kOe applied parallel to each of the principal axes. In the 〈100〉 case, the transition from the A toan intermediate ferrimagnetic (Q) state is first‐order at 4.2 K (critical field H c ?21 kOe) but is continuous from ∠6 K up to T N , as H c →O. The Q‐to‐paramagnetic (P) transition is rapid but continuous at 4.2 K (H c ?40 kOe) and becomes broad as T N is approached. In the 〈110〉 case the A‐to‐Q transition remains essentially first‐order from 4.2 K (H c ?15 kOe) up to T N ; above T N rapid P‐to‐Q transitions occur at very high fields. The magnetic structure of the Q state is found to be that of HoP.

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