RT Journal Article
T1 Complex cation and spin orders in the high-pressure ferrite CoFe3O5
A1 Hong, Ka
A1 Solana Madruga, Elena
A1 Coduri, Mauro
A1 Attfield, Paul
AB 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.
PB American Chemical Society
SN 0020-1669
YR 2018
FD 2018
LK https://hdl.handle.net/20.500.14352/92951
UL https://hdl.handle.net/20.500.14352/92951
LA eng
NO 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
NO Engineering & Physical Sciences Research Council (Reino Unido)
DS Docta Complutense
RD 10 abr 2025