INFLUENCE OF NUCLEAR TRACKS ON THE MAGNETIC-PROPERTIES OF A (GD,BI)3(FE,GA)5O12 GARNET FILM

The temperature dependence of the saturation magnetization of an epitaxial Gd2.3 Bi0.7-Fe4.5 Ga0.5 O12 garnet film irradiated with 180-MeV Xe ions of different doses has been investigated experimentally and analyzed theoretically in terms of molecular-field theory. The magnetic ordering inside the nuclear tracks turns out to be destroyed as a result of the large degree of disorder. The effective nuclear track diameter is estimated to be 15 nm. The molecular-field coefficients deduced from the magnetization curves depend on dose. © 1979 The American Physical Society.