Abstract / Description of output
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.
Original language | English |
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Journal | Inorganic Chemistry |
Early online date | 1 Nov 2018 |
DOIs | |
Publication status | E-pub ahead of print - 1 Nov 2018 |
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Complex cation and spin orders in the high pressure ferrite CoFe3O5
Attfield, P. (Creator) & Hong, K. H. (Creator), Edinburgh DataShare, 1 Nov 2019
DOI: 10.7488/ds/2466, https://pubs.acs.org/doi/abs/10.1021/acs.inorgchem.8b02458
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