J. Phys. IV France
Volume 114, April 2004
Page(s) 643 - 644

J. Phys. IV France
114 (2004) 643
DOI: 10.1051/jp4:2004114154

Structural peculiarities of phase transitions in heterospin systems

G. Romanenko1, 1, S. Fokin1, V. Ikorskii1 and V. Ovcharenko1

1  International Tomography Center SB RAS, Institutskaya 3a, Novosibirsk 630090, Russia

New heterospin complexes of metal hexafluoroacetylacetonates with pyrazole-substituted nitronyl nitroxides were synthesized and structurally characterized. For all compounds, detail X-ray investigations (Smart Apex diffractometer, Bruker AXS) in the temperature range 100-300 K were performed. It has been shown that the temperature range of magnetic phase transition coincided with the the temperature range of density changing. Movements of atoms in the course of phase transitions have been analized. Key words. Nitroxides - copper(II) complexes - structure - phase transition

© EDP Sciences 2004