SMALL-ANGLE NEUTRON-SCATTERING BEHAVIOR OF FE91ZR9 GLASS UNDER MAGNETIC-FIELD

Zero-field and in-field small-angle neutron scattering measurements ov er a wide Q range are presented for the Fe91Zr9 metallic glass in the 10-290 K range. Two transitions observed at 210 K and around 60 K are related to Tc and reentrant transition temperature, respectively. The spectra (0.003 Angstrom(-1)<Q<0.5 Angstrom(-1)) reveal the existence o f an important contribution at the lowest a values and at least two hu mps in the entire curves. The application of the magnetic field result s in an anisotropic signal, and a global decrease of intensity. The ma gnetic field drastically reduces I(Q) in the region for Q<0.04 Angstro m(-1), but not so strongly at larger Q values (even at H = 4 T), becom ing more evident a remaining hump. Its origin can so far be uniquely e xplained by the models dealing with the existence of clusters embedded in a ferromagnetic matrix. (C) 1996 American Institute of Physics.