Numéro
J. Phys. I France
Volume 6, Numéro 9, September 1996
Page(s) 1203 - 1216
DOI https://doi.org/10.1051/jp1:1996124
J. Phys. I France 6 (1996) 1203-1216
DOI: 10.1051/jp1:1996124

Dilution Effects in a Spin Crossover System, Modelled in Terms of Direct and Indirect Intermolecular Interactions

H. Constant-Machado1, J. Linares1, F. Varret1, J.G. Haasnoot2, J.P. Martin3, J. Zarembowitch3, A. Dworkin4 and A. Bousseksou5

1  Laboratoire de Magnétisme et d'Optique URA 1531 CNRS, Université de Versailles, 78035 Versailles Cedex, France
2  Institute of Chemistry, Gorlaeus Laboratories, Leiden University, POB 9502, 2300 RA Leiden, The Netherlands
3  Laboratoire de Chimie Inorganique URA 420 CNRS, Université Paris Sud, 91405 Orsay Cedex, France
4  Laboratoire de Chimie Physique des Matériaux Amorphes URA 1104 CNRS, Université paris Sud, 91405 Orsay Cedex, France
5  Laboratoire de Chimie de Coordination UPR 8241 CNRS, 31077 Toulouse Cedex, France


Received 21 July 1995, revised 27 February 1996, received in final form 7 May 1996, accepted 10 May 1996

Abstract
We have studied by 57Fe Mössbauer spectroscopy and magnetic measurements the spin transition exhibited by the series: , consisting of a spin-crossover iron(II) system diluted in a high-spin cobalt(II) matrix. We performed Monte Carlo simulations of the thermal variation of the high-spin fraction, using a two-level Ising-type Hamiltonian. A good agreement with experiment is obtained by the introduction of an indirect interaction of the spin-crossover units via the non-spin crossover unit, the origin of which is discussed in steric terms.



© Les Editions de Physique 1996

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.