Crystal and magnetic structure of KFeO2 |
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Authors: | Z. Tomkowicz A. Szytuła |
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Affiliation: | Institute of Physics of the Jagellonian University, Reymonta 4, 30-059 Kraków, Poland |
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Abstract: | The crystal and magnetic structures of KFeO2 have been determined by neutron and X-ray powder-diffraction and Mössbauer-effect techniques. The crystal structure at 4.2 K and 300 K is orthorhombic and the magnetic space group is Pbca'. The Fe3+-ions in this structure are tetrahedrally coordinated by oxygen ions, and each Fe3+-ion has a magnetic moment which is antiferromagnetically coupled to the moments of four Fe3+-neighbours. The direction of the moments is parallel to the a-axis. A crystal phase transition has been observed near the Néel temperature?960 K. |
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