Magnetic behavior of curium dioxide with non-magnetic ground state

Fumiaki Niikura; Takashi Hotta

doi:10.1103/PhysRevB.83.172402

Magnetic behavior of curium dioxide with non-magnetic ground state

Strongly Correlated Electrons 2014-05-30 v1 Materials Science

Authors: Fumiaki Niikura , Takashi Hotta

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Abstract

In order to understand magnetic behavior observed in CmO $_2$ with non-magnetic ground state, we numerically evaluate magnetic susceptibility on the basis of a seven-orbital Anderson model with spin-orbit coupling. Naively we do not expect magnetic behavior in CmO $_2$ , since Cm is considered to be tetravalent ion with six $5f$ electrons and the ground state is characterized by $J$ =0, where $J$ is total angular momentum. However, there exists magnetic excited state and the excitation energy is smaller than the value of the Land\'e interval rule due to the effect of crystalline electric field potential. Then, we open a way to explain magnetic behavior in CmO $_2$ .

Keywords

curium dioxide magnetic susceptibility Anderson model spin-orbit coupling crystal field effect non-magnetic ground state

Cite

@article{arxiv.1103.0076,
  title  = {Magnetic behavior of curium dioxide with non-magnetic ground state},
  author = {Fumiaki Niikura and Takashi Hotta},
  journal= {arXiv preprint arXiv:1103.0076},
  year   = {2014}
}

Comments

4 pages, 3 figures. Submitted to Phys. Rev. B

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