The Fe(3)Rt alloy thin films were epitaxially grown oil MgO(100) substrate by e-beam evaporation. The films were partially ordered at the substrate deposition temperature above 350 degrees C. These partially ordered films exhibit very large biaxial magnetic anisotropy constant in the order of 10(5) J/m(3) and produce double switching in the hysteresis loops. The difference of the switching field of these films can be up to about 3 x 10(5) A/m by tuning the angle of the applied field with respect to the easy axes. This double switching behavior sterns from the large biaxial magnetic anisotropy of the films. (c) 2007 Elsevier B.V. All rights reserved.