Sr₆Co₅0₁₅: non-one-dimensional behavior of a charge ordered structurally quasi-one-dimensional oxide
Botana, A. S. · Botta, P. M. · de la Calle, C. · Piñeiro, A. · Pardo, V. · Baldomir, D. · Alonso, J. A.
Original · EN
We have synthesized Sr₆Co₅O₁₅, a quasi-one-dimensional oxide, measured its magnetic properties and calculated its electronic structure by ab initio techniques. We have found strong evidence for its electronic and magnetic behavior not to follow the trend of its structural series. The magnetic coupling inside the CoO₃ chains is not purely ferromagnetic, the long-range coupling inside them is very weak. The Co moments are slightly canted due to their large orbital angular momenta being oriented along each particular quantization axis, that is different for each Co⁴⁺ atom in the structure. Our thermopower calculations are in agreement with the experiment, supporting our model of the magnetic ground state of the compound.
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