MAGNETIC COUPLING BETWEEN THE DIFFERENT PHASES IN NANOCRYSTALLINE FE-SI-B STUDIED BY SMALL-ANGLE NEUTRON-SCATTERING

Authors
KOHLBRECHER J WIEDENMANN A WOLLENBERGER H
Citation
J. Kohlbrecher et al., MAGNETIC COUPLING BETWEEN THE DIFFERENT PHASES IN NANOCRYSTALLINE FE-SI-B STUDIED BY SMALL-ANGLE NEUTRON-SCATTERING, Zeitschrift fur Physik. B, Condensed matter, 104(1), 1997, pp. 1-4
Citations number
12
Categorie Soggetti
Physics, Condensed Matter
Journal title
Zeitschrift fur Physik. B, Condensed matter → ACNP
ISSN journal
07223277
Volume
104
Issue
1
Year of publication
1997
Pages
1 - 4
Database
ISI
SICI code
0722-3277(1997)104:1<1:MCBTDP>2.0.ZU;2-E
Abstract
The magnetic coupling in the two-phase nanostructure of Fe73.5Si15.5B7 Nb3Cu1 has been investigated by SANS technique. The scattering functio n for partially aligned magnetic moments of ferromagnetic single domai n particles following the Langevin statistics of superparamagnetism ha s been derived which describes the field and temperature dependency of the SANS profiles. Above the Curie temperature of the amorphous phase T-c(am) the nanocrystals show superparamagnetic scattering behaviour whereas below T-c(am) they interact by magnetostatic forces only and n ot by exchange coupling via the amorphous matrix.