Abstract

The magnetic phase diagram of Ho–Ag has been established using magnetoresistance,magnetostriction and neutron diffraction experiments versus applied field and temperature. Threedifferent magnetic phases were observed: an incommensurate antiferromagnetic phase (IC) belowTN = 33 K, a commensurate antiferromagnetic phase (C) above 5 T and belowT1 (5–8 K) and a ferromagnetic component above 3 T. The IC phase undergoes spin reorientations around 5 T(IC′) and13 T (IC′′).

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