Spin Frustration and Magnetic Exchange in Cobalt Aluminum Oxide Spinels

Details Spin Frustration and Magnetic Exchange in Cobalt Aluminum Oxide Spinels Spin Frustration and Magnetic Exchange in Cobalt Aluminum Oxide Spinels

2007-11-08

arxiv.org/abs/0711.1301v1

Physics

Condensed Matter

Materials Science

19 pages, 9 figures, 46 references

Scientific paper

10.1103/PhysRevB.77.094412

We report on x-ray diffraction, magnetic susceptibility, electron- spin resonance and heat- capacity studies of Co[Al_1-xCo_x]_2O_4 for Co concentrations 0 10 indicates the presence of strong spin frustration at least for x < 0.6. The frustration mechanism is attributed to competing nearest neighbor and next-nearest neighbor superexchange interactions between the A-site Co^2+ ions.

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