Magnetic structure and properties of centrosymmetric twisted-melilite K2CoP2O7

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Royal Society of Chemistry
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 Pn′nm, #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. © The Royal Society of Chemistry 2017
Magnetic properties, Neutron diffraction, Antiferromagnetic materials, Crystal structure, Magnetic moments, Spin
Sale, M., Avdeev, M., Mohamed, Z., Ling, C. D., & Barpanda, P. (2017). Magnetic structure and properties of centrosymmetric twisted-melilite K2CoP2O7. Dalton Transactions, 46(19), 6409-6416. doi:10.1039/C7DT00978J