Transport and thermodynamic evidence for a marginal Fermi-liquid state in ZrZn 2

Mike Sutherland, R. P. Smith, N. Marcano, Y. Zou, S. E. Rowley, F. M. Grosche, N. Kimura, S. M. Hayden, S. Takashima, Minoru Nohara, H. Takagi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Measurements of low-temperature transport and thermodynamic properties have been used to characterize the non-Fermi-liquid state of the itinerant ferromagnet ZrZn 2. We observe a T5 /3 temperature dependence of the electrical resistivity at zero field, which becomes T2-like in an applied field of 9 T. In zero field, we also measured the thermal conductivity, and we see a novel linear-in-T dependence of the difference between the thermal and electrical resistivities. Heat-capacity measurements, also at zero field, reveal an upturn in the electronic contribution at low temperatures when the phonon term is subtracted. Taken together, we argue that these properties are consistent with a marginal Fermi-liquid state, which is predicted by a mean-field model of enhanced spin fluctuations on the border of ferromagnetism in three dimensions. We compare our data to quantitative predictions and establish this model as a compelling theoretical framework for understanding ZrZn 2.

Original languageEnglish
Article number035118
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number3
DOIs
Publication statusPublished - Jan 18 2012
Externally publishedYes

Fingerprint

Fermi liquids
Thermodynamics
thermodynamics
electrical resistivity
Spin fluctuations
Ferromagnetism
borders
Transport properties
Temperature
ferromagnetism
Specific heat
Thermal conductivity
thermal conductivity
Thermodynamic properties
thermodynamic properties
transport properties
specific heat
temperature dependence
Liquids
liquids

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Sutherland, M., Smith, R. P., Marcano, N., Zou, Y., Rowley, S. E., Grosche, F. M., ... Takagi, H. (2012). Transport and thermodynamic evidence for a marginal Fermi-liquid state in ZrZn 2 Physical Review B - Condensed Matter and Materials Physics, 85(3), [035118]. https://doi.org/10.1103/PhysRevB.85.035118

Transport and thermodynamic evidence for a marginal Fermi-liquid state in ZrZn 2 . / Sutherland, Mike; Smith, R. P.; Marcano, N.; Zou, Y.; Rowley, S. E.; Grosche, F. M.; Kimura, N.; Hayden, S. M.; Takashima, S.; Nohara, Minoru; Takagi, H.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 85, No. 3, 035118, 18.01.2012.

Research output: Contribution to journalArticle

Sutherland, M, Smith, RP, Marcano, N, Zou, Y, Rowley, SE, Grosche, FM, Kimura, N, Hayden, SM, Takashima, S, Nohara, M & Takagi, H 2012, 'Transport and thermodynamic evidence for a marginal Fermi-liquid state in ZrZn 2 ', Physical Review B - Condensed Matter and Materials Physics, vol. 85, no. 3, 035118. https://doi.org/10.1103/PhysRevB.85.035118
Sutherland, Mike ; Smith, R. P. ; Marcano, N. ; Zou, Y. ; Rowley, S. E. ; Grosche, F. M. ; Kimura, N. ; Hayden, S. M. ; Takashima, S. ; Nohara, Minoru ; Takagi, H. / Transport and thermodynamic evidence for a marginal Fermi-liquid state in ZrZn 2 In: Physical Review B - Condensed Matter and Materials Physics. 2012 ; Vol. 85, No. 3.
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