2026-06-28T20:32:08Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/929512025-03-18T14:17:59Zcom_20.500.14352_14col_20.500.14352_15

Complex cation and spin orders in the high-pressure ferrite CoFe3O5 Hong, Ka Solana Madruga, Elena Coduri, Mauro Attfield, Paul A ferrite in the Sr2Tl2O5-type MFe3O5 family with M = Co has been synthesized at 12 GPa pressure. Neutron diffraction shows the sample to be Co deficient with composition Co0.6Fe3.4O5. The Co/Fe cation distribution is found to be profoundly different from those of MFe3O5 analogs and lies between normal and inverse limits, as Co2+ substitutes across trigonal prismatic and one of the two octahedral sites. CoFe3O5 shows complex magnetic behavior with weak ferromagnetism below TC1 ≈ 300 K and a second transition to ferrimagnetic order at TC2 ≈100 K. Spin scattering of carriers leads a substantial increase in the hopping activation energy below TC1, and a small negative magnetoresistance is observed at low temperatures. 2024-01-15T08:42:20Z 2024-01-15T08:42:20Z 2018 journal article K. H. Hong, E. Solana-Madruga, M. Coduri, J. P. Attfield. Complex cation and spin orders in the high-pressure ferrite CoFe3O5. Inorg. Chem. 2018, 57, 14347-14352. doi: 10.1021/acs.inorgchem.8b02458 0020-1669 10.1021/acs.inorgchem.8b02458 https://hdl.handle.net/20.500.14352/92951 https://doi.org/10.1021/acs.inorgchem.8b02458 eng info:eu-repo/grantAgreement/EPSRC/UKRI/ EP/P021786/1 http://creativecommons.org/licenses/by-nc-nd/4.0/ restricted access Attribution-NonCommercial-NoDerivatives 4.0 International American Chemical Society