Thermodynamic Properties of (Ca,Sr)$_2$RuO$_4$ in Magnetic Fields

J. Baier; T. Zabel; M. Kriener; P. Steffens; O. Schumann; O. Friedt; A. Freimuth; A. Revcolevschi; S. Nakatsuji; Y. Maeno; T. Lorenz; M. Braden

doi:10.1016/j.physb.2006.01.215

Thermodynamic Properties of (Ca,Sr)$_2$RuO$_4$ in Magnetic Fields

Strongly Correlated Electrons 2009-11-11 v1

Authors: J. Baier , T. Zabel , M. Kriener , P. Steffens , O. Schumann , O. Friedt , A. Freimuth , A. Revcolevschi , S. Nakatsuji , Y. Maeno , T. Lorenz , M. Braden

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Abstract

We have studied the influence of a magnetic field on the thermodynamic properties of Ca $_{2-x}$ Sr $_{x}$ RuO $_4$ in the intermediate metallic region with tilt and rotational distortions ( $0.2\leq x \leq 0.5$ ). We find strong and anisotropic thermal expansion anomalies at low temperatures, which are suppressed and even reversed by a magnetic field. The metamagnetic transition of Ca $_{1.8}$ Sr $_{0.2}$ RuO $_4$ is accompanied by a large magnetostriction. Furthermore, we observe a strong magnetic-field dependence of $c_p/T$ , that can be explained by magnetic fluctuations.

Keywords

thermodynamic properties magnetic fields Ca$_{2-x}$Sr$_{x}$RuO$_4$ thermal expansion anomalies magnetostriction

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@article{arxiv.cond-mat/0511220,
  title  = {Thermodynamic Properties of (Ca,Sr)$_2$RuO$_4$ in Magnetic Fields},
  author = {J. Baier and T. Zabel and M. Kriener and P. Steffens and O. Schumann and O. Friedt and A. Freimuth and A. Revcolevschi and S. Nakatsuji and Y. Maeno and T. Lorenz and M. Braden},
  journal= {arXiv preprint arXiv:cond-mat/0511220},
  year   = {2009}
}

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2 pages, 3 figures, to appear in Physica B (Proceedings of SCES'05)

Thermodynamic Properties of (Ca,Sr)$_2$RuO$_4$ in Magnetic Fields

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