Thermal stability of magnetic microstructures in Nd60Fe30Al10 melt spun alloys

R. MUTAL; O. BILLONI; L. FABIETTI; S. URRETA

PHYSICA B - CONDENSED MATTER

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2004 p. 217 - 219

0921-4526

The glass-forming Nd60Fe30Al10 alloy, processed by melt spinning, exhibits hard magnetic properties. For a relatively wide range of quenching rates, a single magnetic phase behavior is observed at room temperature, with coercivities between 0.1 and 0.4 T. As the quenching rate decreases, the hard magnetic properties improve and the thermal stability of the resulting magnetic microstructure?as measured by the reciprocal of the mean fluctuations field Hf ?decreases. The hysteresis and thermal relaxation properties observed for different cooling rates are discussed on the basis of domain wall movement in a ferromagnetic matrix in which small, highly anisotropic clusters develop as the quenching rate decreases.