Metamagnetic behavior and Kondo breakdown in heavy-fermion CeFePO

S. Kitagawa, H. Ikeda, Y. Nakai, T. Hattori, K. Ishida, Yoichi Kamihara, M. Hirano, H. Hosono

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We report that nonmagnetic heavy-fermion (HF) iron oxypnictide CeFePO with two-dimensional XY-type anisotropy shows a metamagnetic behavior at the metamagnetic field H M4T perpendicular to the c axis and that a critical behavior is observed around H M. Although the magnetic character is entirely different from that in other Ce-based HF metamagnets, H M in these metamagnets is linearly proportional to the inverse of the effective mass, or to the temperature where the susceptib+ility shows a peak. This finding suggests that H M is a magnetic field breaking the local Kondo singlet, and the critical behavior around H M is driven by the Kondo breakdown accompanied by the Fermi-surface instability.

Original languageEnglish
Article number277002
JournalPhysical Review Letters
Volume107
Issue number27
DOIs
Publication statusPublished - 2011 Dec 29

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breakdown
fermions
Fermi surfaces
iron
anisotropy
magnetic fields
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Kitagawa, S., Ikeda, H., Nakai, Y., Hattori, T., Ishida, K., Kamihara, Y., ... Hosono, H. (2011). Metamagnetic behavior and Kondo breakdown in heavy-fermion CeFePO. Physical Review Letters, 107(27), [277002]. https://doi.org/10.1103/PhysRevLett.107.277002

Metamagnetic behavior and Kondo breakdown in heavy-fermion CeFePO. / Kitagawa, S.; Ikeda, H.; Nakai, Y.; Hattori, T.; Ishida, K.; Kamihara, Yoichi; Hirano, M.; Hosono, H.

In: Physical Review Letters, Vol. 107, No. 27, 277002, 29.12.2011.

Research output: Contribution to journalArticle

Kitagawa, S, Ikeda, H, Nakai, Y, Hattori, T, Ishida, K, Kamihara, Y, Hirano, M & Hosono, H 2011, 'Metamagnetic behavior and Kondo breakdown in heavy-fermion CeFePO', Physical Review Letters, vol. 107, no. 27, 277002. https://doi.org/10.1103/PhysRevLett.107.277002
Kitagawa, S. ; Ikeda, H. ; Nakai, Y. ; Hattori, T. ; Ishida, K. ; Kamihara, Yoichi ; Hirano, M. ; Hosono, H. / Metamagnetic behavior and Kondo breakdown in heavy-fermion CeFePO. In: Physical Review Letters. 2011 ; Vol. 107, No. 27.
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