Evolution of the magnetic and structural properties of Fe1-xCox V2 O4

R. Sinclair, J. Ma, H. B. Cao, T. Hong, M. Matsuda, Z. L. Dun, H. D. Zhou

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Abstract

The magnetic and structural properties of single-crystal Fe1-xCoxV2O4 samples have been investigated by performing specific heat, susceptibility, neutron diffraction, and x-ray diffraction measurements. As the orbital-active Fe2+ ions with larger ionic size are gradually substituted by the orbital-inactive Co2+ ions with smaller ionic size, the system approaches the itinerant electron limit with decreasing V-V distance. Then, various factors such as the Jahn-Teller distortion and the spin-orbital coupling of the Fe2+ ions on the A sites and the orbital ordering and electronic itinerancy of the V3+ ions on the B sites compete with each other to produce a complex magnetic and structural phase diagram. This phase diagram is compared to those of Fe1-xMnxV2O4 and Mn1-xCoxV2O4 to emphasize several distinct features.

Original languageEnglish
Article number134410
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number13
DOIs
StatePublished - Oct 12 2015

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