The role of magnetic ions on the magnetotransport properties of the charge-transfer salts β″-BEDT-[formula omitted] where [formula omitted], Cr3+ or Fe3

We report high-field magnetotransport measurements on β″-BEDT-TTF4[(H3O)M(C2O4)3]C5H5N, where M=Ga3+, Cr3+ or Fe3+. In spite of the differing M ions, these compounds have very similar Fermi surfaces. We observe four distinct Shubnikov–de Haas frequencies, corresponding to four Fermi-surface pockets;...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2004-05, Vol.272-276, p.1062-1064
Main Authors: Coldea, A.I, Bangura, A.F, Singleton, J, Ardavan, A, Akutsu-Sato, A, Akutsu, H, S. Turner, S, Day, P
Format: Article
Language:English
Subjects:
Magnetisation
Organic metals
Quantum oscillations
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Summary:We report high-field magnetotransport measurements on β″-BEDT-TTF4[(H3O)M(C2O4)3]C5H5N, where M=Ga3+, Cr3+ or Fe3+. In spite of the differing M ions, these compounds have very similar Fermi surfaces. We observe four distinct Shubnikov–de Haas frequencies, corresponding to four Fermi-surface pockets; the frequencies exhibit the additive relationship expected for a compensated semimetal. The compounds show paramagnetic behaviour and no superconductivity down to 0.5K, in contrast to other materials of the same family with different solvent molecules.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2003.12.104