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Magnetic ordering in the rutile molecular magnets MII[N(CN)2]2 (M = Ni, Co, Fe, Mn, Ni0.5Co0.5, and Ni0.5Fe0.5)

Lappas, A., Wills, A.S., Green, M.A., Prassides, K., Kurmoo, M. (2003) Magnetic ordering in the rutile molecular magnets MII[N(CN)2]2 (M = Ni, Co, Fe, Mn, Ni0.5Co0.5, and Ni0.5Fe0.5). Physical Review B - Condensed Matter and Materials Physics, 67 (14). pp. 1444061-1444068. ISSN 0163-1829. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Abstract

Rietveld refinement of powder neutron diffraction data, combined with group theory considerations, is used to determine the magnetic structures of the binary metal dicyanamide, MII[N(CN)2]2 where M = Ni, Co, Fe, Mn, Ni0.5Co0.5, and Ni0.5Fe0.5. Compounds with M = Mn or Fe show a canted antiferromagnetic arrangement of spin oriented in the ab crystallographic plane, with antiparallel components of the two sublattices along the a axis and parallel along the b axis. Symmetry considerations forbid an additional moment, whether compensated or not, to be present along the c axis. The compounds with fewer unpaired electrons (Co and Ni) are ferromagnets, with all moments oriented along the c axis. The mixed composition of Ni0.5Co0.5 displays the same collinear ferromagnetic structure as its parent compounds. However, the composition with M = Ni0.5Fe0.5, whose parent compounds show different magnetic behavior, does not exhibit long-range magnetic ordering down to 1.7 K. Magnetostriction was observed for the ferromagnets for which we investigated the variable temperature powder neutron diffraction. The cobalt-rich compounds show more pronounced effects, consistent with their increasing magnetocrystalline anisotropy.

Item Type: Article
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - Phys. Rev. B Condens. Matter Mater. Phys. [Field not mapped to EPrints] AD - Inst. of Electron. Struct. and Laser, Found. for Res./Technology-Hellas, P.O. Box 1527, 711 10 Heraklion Crete, Greece [Field not mapped to EPrints] AD - Department of Chemistry, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London, WC1H OAJ, United Kingdom [Field not mapped to EPrints] AD - Davy-Faraday Research Laboratory, Royal Institution of Great Britain, 21 Albermarle Street, London, W1S 4BS, United Kingdom [Field not mapped to EPrints] AD - Sch. Chemistry, Phys./Environ. Sci., University of Sussex, Brighton BN1 9QJ, United Kingdom [Field not mapped to EPrints] AD - Inst. Phys. Chim. Mat. Strasbourg, CNRS-UMR 7504, 23 rue de Loess, F-67037 Strasbourg Cedex, France [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: cobalt, cyanide, ferromagnetic material, iron, manganese, metal complex, nickel, nitrogen, anisotropy, article, chemical composition, crystal structure, crystallography, electron diffraction, magnet, neutron, theory
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 21 Oct 2015 15:23 UTC
Last Modified: 29 May 2019 16:11 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/51135 (The current URI for this page, for reference purposes)
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