Sr$_6$Co$_5$0{$_1$$_5$}: non-one-dimensional behavior of a charge ordered structurally quasi-one-dimensional oxide

A. S. Botana; P. M. Botta; C. de la Calle; A. Piñeiro; V. Pardo; D. Baldomir; J. A. Alonso

doi:10.1103/PhysRevB.83.184420

Sr$_6$Co$_5$0{$_1$$_5$}: non-one-dimensional behavior of a charge ordered structurally quasi-one-dimensional oxide

Strongly Correlated Electrons 2011-06-03 v2

Authors: A. S. Botana , P. M. Botta , C. de la Calle , A. Piñeiro , V. Pardo , D. Baldomir , J. A. Alonso

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Abstract

We have synthesized Sr $_6$ Co $_5$ O $_{15}$ , 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 CoO $_3$ 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 Co $^{4+}$ atom in the structure. Our thermopower calculations are in agreement with the experiment, supporting our model of the magnetic ground state of the compound.

Keywords

quasi-one-dimensional oxide charge order magnetic properties electronic structure ab initio calculations thermopower canted moments

Cite

@article{arxiv.1009.3736,
  title  = {Sr$_6$Co$_5$0{$_1$$_5$}: non-one-dimensional behavior of a charge ordered structurally quasi-one-dimensional oxide},
  author = {A. S. Botana and P. M. Botta and C. de la Calle and A. Piñeiro and V. Pardo and D. Baldomir and J. A. Alonso},
  journal= {arXiv preprint arXiv:1009.3736},
  year   = {2011}
}

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9 pages, 5 figures, 3 tables

Sr$_6$Co$_5$0{$_1$$_5$}: non-one-dimensional behavior of a charge ordered structurally quasi-one-dimensional oxide

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