論文

査読有り
2013年3月

Ferromagnetic Quantum Critical Point Induced by Tuning the Magnetic Dimensionality of the Heavy-Fermion Iron Oxypnictide Ce(Ru1-xFex)PO

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
  • Shunsaku Kitagawa
  • ,
  • Kenji Ishida
  • ,
  • Tetsuro Nakamura
  • ,
  • Masanori Matoba
  • ,
  • Yoichi Kamihara

82
3
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.7566/JPSJ.82.033704
出版者・発行元
PHYSICAL SOC JAPAN

We have performed P-31-NMR measurements of the c-axis-aligned poly-crystal Ce(Ru1-xFex)PO with a two-dimensional layered structure in order to understand the origin of T-Curie suppression by Fe substitution. The variation in the magnetic-fluctuation character with respect to x is investigated from the in-plane and out-of-plane fluctuations and the relationship between the static spin susceptibility and the in-plane fluctuation. It was found that three-dimensional ferromagnetic (FM) correlations are dominant and give rise to the FM ordering in CeRuPO. The out-of plane fluctuations are significantly suppressed with increasing x, and it was revealed that the FM fluctuations become two dimensional near a FM quantum critical point (QCP). Our NMR results strongly suggest that a unique FM QCP in Ce(Ru1-xFex)PO is induced by the suppression of the magnetic correlations along the c-axis, which is a different mechanism from that presumed in heavy-fermion compounds.

Web of Science ® 被引用回数 : 9

リンク情報
DOI
https://doi.org/10.7566/JPSJ.82.033704
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000315572200011&DestApp=WOS_CPL
ID情報
  • DOI : 10.7566/JPSJ.82.033704
  • ISSN : 0031-9015
  • Web of Science ID : WOS:000315572200011

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