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Dipolar ordering in Fe8?

X. Martinez-Hidalgo·E. M. Chudnovsky·A. Aharony
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Abstract

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.

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X. Martinez-Hidalgo, E. M. Chudnovsky, A. Aharony. 2001-01-18. Dipolar ordering in Fe8?. https://doi.org/10.1209/epl%2Fi2001-00331-2

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