Issue |
Europhys. Lett.
Volume 48, Number 4, November II 1999
|
|
---|---|---|
Page(s) | 455 - 460 | |
Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
DOI | https://doi.org/10.1209/epl/i1999-00504-y | |
Published online | 01 September 2002 |
RKKY interactions between nanomagnets of arbitrary shape
Department of Physics and Astronomy and Center for Materials Research and Analysis University of Nebraska, Lincoln, NE 68588, USA
Received:
25
May
1999
Accepted:
21
September
1999
The RKKY interaction between well-separated magnetic particles in a nonmagnetic metallic matrix is calculated. It turns out that the net interaction can be mapped onto an RKKY interaction between two point-like effective moments. The effective moments exhibit a strongly oscillating dependence on the particle's size, shape, and orientation, but their magnitudes are governed by scaling laws. As a rule, magnetostatic interactions tend to suppress the RKKY effect in particles larger than about 1 nm. Surface roughness leaves the effective-moment picture unaltered but tends to yield a moderate reduction of the effective moments. The results are discussed in the context of magnetic recording, spin-glass magnetism, and cluster physics.
PACS: 75.50.Lk – Spin glasses and other random magnets / 75.10.Nr – Spin-glass and other random models / 75.70.Pa – Giant magnetoresistance
© EDP Sciences, 1999
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.