Unusual heavy-mass nearly ferromagnetic state with a surprisingly large Wilson ratio in the double layered ruthenates (Sr1-x Cax) 3 Ru2 O7

Zhe Qu, Leonard Spinu, Huiqiu Yuan, Vladimir Dobrosavljević, Wei Bao, Jeffrey W. Lynn, M. Nicklas, Jin Peng, Tijiang Liu, David Fobes, Etienne Flesch, Zhiqiang Mao

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

We report an unusual nearly ferromagnetic heavy-mass state with a surprisingly large Wilson ratio Rw (e.g., Rw ∼700 for x=0.2) in double layered ruthenates (Sr1-x Cax) 3 Ru2 O7 with 0.08<x<0.4. This state does not evolve into a long-range ferromagnetically ordered state despite considerably strong ferromagnetic correlations, but it freezes into a cluster-spin glass at low temperatures. In addition, evidence of non-Fermi-liquid behavior is observed as the spin-freezing temperature of the cluster-spin glass approaches zero near x 0.1. We discuss the origin of this unique magnetic state from the Fermi-surface information probed by Hall-effect measurements.

Original languageEnglish (US)
Article number180407
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number18
DOIs
StatePublished - Nov 14 2008

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Spin glass
spin glass
Fermi surface
Hall effect
Freezing
freezing
Fermi surfaces
Temperature
Liquids
liquids
temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Qu, Zhe ; Spinu, Leonard ; Yuan, Huiqiu ; Dobrosavljević, Vladimir ; Bao, Wei ; Lynn, Jeffrey W. ; Nicklas, M. ; Peng, Jin ; Liu, Tijiang ; Fobes, David ; Flesch, Etienne ; Mao, Zhiqiang. / Unusual heavy-mass nearly ferromagnetic state with a surprisingly large Wilson ratio in the double layered ruthenates (Sr1-x Cax) 3 Ru2 O7. In: Physical Review B - Condensed Matter and Materials Physics. 2008 ; Vol. 78, No. 18.
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Unusual heavy-mass nearly ferromagnetic state with a surprisingly large Wilson ratio in the double layered ruthenates (Sr1-x Cax) 3 Ru2 O7. / Qu, Zhe; Spinu, Leonard; Yuan, Huiqiu; Dobrosavljević, Vladimir; Bao, Wei; Lynn, Jeffrey W.; Nicklas, M.; Peng, Jin; Liu, Tijiang; Fobes, David; Flesch, Etienne; Mao, Zhiqiang.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 78, No. 18, 180407, 14.11.2008.

Research output: Contribution to journalArticle

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AU - Bao, Wei

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AU - Peng, Jin

AU - Liu, Tijiang

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AU - Flesch, Etienne

AU - Mao, Zhiqiang

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