Interplay between mesoscopic phase separation and bulk magnetism in the layered NaxCoO2

A. Zorkovska; M. Orendac; J. Sebek; E. Santava; P. Svoboda; I. Bradaric; I. Savic; A. Feher

doi:10.1103/PhysRevB.72.132412

Interplay between mesoscopic phase separation and bulk magnetism in the layered NaxCoO2

Strongly Correlated Electrons 2009-11-11 v1

Authors: A. Zorkovska , M. Orendac , J. Sebek , E. Santava , P. Svoboda , I. Bradaric , I. Savic , A. Feher

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Abstract

Specific heat of the layered NaxCoO2 (x=0.65, 0.70 and 0.75) oxides has been measured in the temperature range of 3-360 K and magnetic field of 0 and 9 T. The analysis of data, assuming the combined effect of inter-layer superexchange and the phase separation into mesoscopic magnetic domains with localized spins embedded in a matrix with itinerant electronic character, suggests that the dominant contribution to the specific heat in the region of short-range ordering is mediated by quasi-2D antiferromagnetic clusters, perpendicular to the CoO2 layers.

Keywords

layered cobaltate specific heat phase separation antiferromagnetic clusters mesoscopic magnetic domains superexchange

Cite

@article{arxiv.cond-mat/0509655,
  title  = {Interplay between mesoscopic phase separation and bulk magnetism in the layered NaxCoO2},
  author = {A. Zorkovska and M. Orendac and J. Sebek and E. Santava and P. Svoboda and I. Bradaric and I. Savic and A. Feher},
  journal= {arXiv preprint arXiv:cond-mat/0509655},
  year   = {2009}
}

Interplay between mesoscopic phase separation and bulk magnetism in the layered NaxCoO2

Abstract

Keywords

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