TY - JOUR
T1 - Dipolar ordering in Fe8?
AU - Martínez-Hidalgo, X.
AU - Chudnovsky, E. M.
AU - Aharony, A.
PY - 2001/7/11
Y1 - 2001/7/11
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0035796144&partnerID=8YFLogxK
U2 - 10.1209/epl/i2001-00331-2
DO - 10.1209/epl/i2001-00331-2
M3 - מאמר
AN - SCOPUS:0035796144
VL - 55
SP - 273
EP - 279
JO - Journal de Physique (Paris), Lettres
JF - Journal de Physique (Paris), Lettres
SN - 0295-5075
IS - 2
ER -