Document Detail

Pressure effects on the magnetic behaviour of copper (II) compounds: magnetic ordering of layered organic/inorganic magnets.
MedLine Citation:
PMID:  22466809     Owner:  NLM     Status:  In-Data-Review    
The high hydrostatic pressure effect on the magnetic properties of the layered hybrid compounds Cu(2)(OH)(3)(C(n)H(2n+1)CO(2))⋅mH(2)O with distance between magnetic layers of up to 40 Å is studied. It is shown that the temperature of the ferromagnetic ordering decreases linearly with pressure increase. From measurements of susceptibility in the paramagnetic region, using both quantum Heisenberg and Ising exchange coupling models in layers and dipole interaction between layers, the in- and interlayer interactions are deduced. The dipole interactions are calculated and are shown to coincide with the model of Ising interactions in the layers. The value and decrease of T(c) under pressure are mainly driven by the value and decrease of the in-plane interactions. The formation of the long range ordering in the layered sample with dipolar interaction between layers is analysed. As a conclusion it is suggested that for designing high temperature ferromagnetism in layer compounds it is enough to have large in-plane interactions of ions with specific symmetry in layers and weak dipole interactions between layers.
G Levchenko; V N Varyukhin; L V Berezhnaya; V F Rusakov
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Publication Detail:
Type:  Journal Article     Date:  2012-03-30
Journal Detail:
Title:  Journal of physics. Condensed matter : an Institute of Physics journal     Volume:  24     ISSN:  1361-648X     ISO Abbreviation:  J Phys Condens Matter     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-04-02     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101165248     Medline TA:  J Phys Condens Matter     Country:  England    
Other Details:
Languages:  eng     Pagination:  166002     Citation Subset:  IM    
Donetsk Physico-Technical Institute, National Academy of Sciences of Ukraine, 72, R. Luxemburg Street, 83114, Donetsk, Ukraine.
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