Structural and magnetic properties of mechanically alloyed AlCuFe intermetallics

L. MENDOZA-ZÉLIS, M. MEYER, AND F. H. SÁNCHEZ

physica status solidi (c)

WILEY-VCH

Lugar: Weinheim; Año: 2005 vol. 2 p. 3581 - 3584

1610-1634

We present here a study of the structural and magnetic properties of a series of mechanically alloyed intermetallics around a central composition Al50Cu20Fe30, varying the Cu and Fe content. All the samples have bcc crystalline structure with partial B2 order and show no evidence of a magnetic splitting in the Mössbauer spectra. Thermal annealing, removes some defects but do not change this structural feature. All the studied alloys show, at room temperature, a hysteresis loop that may be interpreted in terms of two magnetic components coming respectively from superparamagnetic and ferromagnetic-like regions. The parameters characterizing thess magnetic properties change with composition but no systematic behavior could be deduced.50Cu20Fe30, varying the Cu and Fe content. All the samples have bcc crystalline structure with partial B2 order and show no evidence of a magnetic splitting in the Mössbauer spectra. Thermal annealing, removes some defects but do not change this structural feature. All the studied alloys show, at room temperature, a hysteresis loop that may be interpreted in terms of two magnetic components coming respectively from superparamagnetic and ferromagnetic-like regions. The parameters characterizing thess magnetic properties change with composition but no systematic behavior could be deduced.