Interplay between 3d and 4f magnetism in CeCoPO

C. Krellner; U. Burkhardt; C. Geibel

doi:10.1016/j.physb.2009.07.046

Interplay between 3d and 4f magnetism in CeCoPO

Superconductivity 2009-09-22 v2 Strongly Correlated Electrons

Authors: C. Krellner , U. Burkhardt , C. Geibel

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Abstract

The ground state properties of CeCoPO, a homologue of the new high temperature superconductors RFePnO1-xFx, were studied by means of susceptibility, specific heat, and resistivity measurements on polycrystals. The observation of a well defined Curie-Weiss behavior above 230K with mu_eff=2.9mu_B and a ferromagnetic ordering below T_C=75K is similar to what was observed in LaCoPO and points to magnetism of the Co-3d electrons. However, the Ce-ions are on the border to magnetism with a Kondo scale of T_K~40K and show an enhanced Sommerfeld-coefficient of \gamma~200mJ/molK^2.

Keywords

magnetic structure ferromagnetism magnetization

Cite

@article{arxiv.0808.0996,
  title  = {Interplay between 3d and 4f magnetism in CeCoPO},
  author = {C. Krellner and U. Burkhardt and C. Geibel},
  journal= {arXiv preprint arXiv:0808.0996},
  year   = {2009}
}

Comments

Fig 1 and Ref. updated, typos corrected

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