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Issue 19, 2017
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Magnetic structure and properties of centrosymmetric twisted-melilite K2CoP2O7

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Abstract

Twisted-melilite dipotassium cobalt pyrophosphate (K2CoP2O7, P42/mnm, #136), originally reported by Gabelica-Robert (1981), was synthesized in powder form by a standard solid-state reaction route. The magnetic properties of the material were studied by magnetometry and its magnetic structure determined using neutron powder diffraction for the first time. Below TN = 11 K, the material adopts a G-type antiferromagnetic structure with moments aligned in the ab-plane (magnetic space group Pnnm, #58.3.473). Ab initio calculations were performed to examine the isotropic magnetic spin exchange parameters as well as the preferred direction of magnetic moments due to spin–orbit coupling. The relationship between crystal structure geometry and the strength of the magnetic interactions was examined and compared to those of melilite-type Sr2CoGe2O7.

Graphical abstract: Magnetic structure and properties of centrosymmetric twisted-melilite K2CoP2O7

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Publication details

The article was received on 17 Mar 2017, accepted on 22 Apr 2017 and first published on 24 Apr 2017


Article type: Paper
DOI: 10.1039/C7DT00978J
Dalton Trans., 2017,46, 6409-6416

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    Magnetic structure and properties of centrosymmetric twisted-melilite K2CoP2O7

    M. Sale, M. Avdeev, Z. Mohamed, C. D. Ling and P. Barpanda, Dalton Trans., 2017, 46, 6409
    DOI: 10.1039/C7DT00978J

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