| Issue |
Europhys. Lett.
Volume 55, Number 2, July 2001
|
|
|---|---|---|
| Page(s) | 273 - 279 | |
| Section | Interdisciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i2001-00331-2 | |
| Published online | 01 December 2003 | |
Dipolar ordering in 
?
1
Departament de Física Fonamental, Universitat de
Barcelona Diagonal 647, 08028 Barcelona, Spain
2
Department of Physics and Astronomy, Lehman College, City
University of New York Bedford Park Boulevard West, Bronx, New
York 10468-1589, USA
3
School of Physics and Astronomy, Raymond and Beverly Sackler
Faculty of Exact Sciences, Tel Aviv University - Tel Aviv 69978, Israel
Corresponding authors: xavim@ubxlab.com chudnov@lehman.cuny.edu aharony@post.tau.ac.il
Received:
24
January
2001
Accepted:
16
May
2001
We show that the low-temperature physics of molecular nanomagnets, contrary to the prevailing one-molecule picture, must be determined by the long-range magnetic ordering due to many-body dipolar interactions. The calculations here performed, using Ewald's summation, suggest a ferromagnetic ground state with a Curie temperature of about 130 mK. The energy of this state is quite close to those of an antiferromagnetic state and to a glass of frozen spin chains. The latter may be realized at finite temperature due to its high entropy.
PACS: 75.50.Xx – Molecular magnets / 75.45.+j – Macroscopic quantum phenomena in magnetic systems
© EDP Sciences, 2001
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