MIXED DYSPROSIUM-YTTRIUM IRON-GARNET, A NEW ISING MAGNET

The magnetization and differential magnetic susceptibility of Dy0.62Y2 .38Fe5O12 single crystals has been measured at T = 4.2 K in pulsed mag netic fields up to 45 T for three orientations of the external magneti c field: H//[1 0 0], H//[1 0 0] and H//[1 1 1]. The magnetic reversal of the rare-earth magnetic subsystem gives rise to several phase trans itions. The anomalies observed in the magnetization curves are interpr eted under the assumption of Ising ordering of the rare-earth ions. (C ) 1998 Elsevier Science B.V. All rights reserved.