Tailoring of paramagnetic (structurally ordered) nanometric grains separated by ferromagnetic (structurally disordered) grain boundaries: Isolating grain-boundary magnetic effects - art. no. 052402

Authors
Amils, X Nogues, J Surinach, S Munoz, JS Baro, MD Hernando, A Morniroli, JP
Citation
X. Amils et al., Tailoring of paramagnetic (structurally ordered) nanometric grains separated by ferromagnetic (structurally disordered) grain boundaries: Isolating grain-boundary magnetic effects - art. no. 052402, PHYS REV B, 6305(5), 2001, pp. 2402
Citations number
38
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6305
Issue
5
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010201)6305:5<2402:TOP(ON>2.0.ZU;2-0
Abstract
Partially reordering heavily milled intermetallic alloys results in structu rally and chemically ordered nanometric grains separated by structurally an d chemically disordered grain boundaries. In systems with disorder induced ferromagnetism this structural microstructure causes a peculiar magnetic mi crostructure: paramagnetic grains separated by magnetically ordered (ferrom agnetic) grain boundaries. This unusual structural-magnetic microstructure allows for the easy separation of the magnetic contribution of the grain bo undaries. This contribution is found to be about 15%, suggesting that the g rain boundary is a few atomic layers thick, in agreement with high-resoluti on transmission electron microscopy observations.