Thermal stability of the induced magnetic anisotropy and structure of the nanocrystalline alloy FeCuNbSiB

The magnetic anisotropy induced in the ribbons of the Fe73.5Cu1Nb3Si13.5B9 alloy in the course of stress annealing combined with the nanocrystallising one was investigated. Crystalline phases formed during the above treatment s were studied by the Mossbauer method. Analysis of the Mossbauer results s howed that the content of the Fe-Si phases depends neither on the exposure time nor on the value of the induced magnetic anisotropy constant. At the s ame time, in the regions containing, along with Fe, Nb and B the process of redistributing the elements proceeds with time, and the deeper the process , the higher the thermal stability of the induced magnetic anisotropy. (C) 2000 Elsevier Science B.V. All rights reserved.