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F. Palacio, P. Oliete, U. Schubert, I. Mijatovic, N. Hüsing, H. Peterlik:
"Magnetic behaviour of a hybrid polymer obtained from ethyl acrylate and the magnetic cluster Mn₁₂O₁₂(acrylate)₁₆";
Journal of Materials Chemistry, 14 (2004), 1873 - 1878.

The magnetic properties of polymers prepared by polymerization of the magnetic cluster Mn₁₂O₁₂(acrylate)₁₆ with various portions of ethyl acrylate as co-monomer are reported. According to SAXS studies, the clusters are homogeneously distributed in the polymer. Ac susceptibility measurements show superparamagnet-like behaviour of the cluster-crosslinked polymers with relaxation following an Arrhenius law with τ₀= 4-8 × 10^-8 s and an energy barrier in the range 45-65 K.

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04969147