Universality and critical behavior at the critical endpoint in the itinerant-electron metamagnet UCoAl

K. Karube, T. Hattori, S. Kitagawa, K. Ishida, N. Kimura, T. Komatsubara

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We performed nuclear-magnetic-resonance measurements on itinerant-electron metamagnet UCoAl to investigate the critical behavior of the magnetism near a metamagnetic (MM) critical endpoint (CEP). We derived c-axis magnetization M c and its fluctuation S c from the measurements of Knight shift and nuclear spin-lattice relaxation rate 1/T 1 as a function of the c-axis external field (H c) and temperature (T). We developed contour plots of M c and S c on the H c-T phase diagram, and observed the strong divergence of S c at the CEP. The critical exponents of M c and S c near the CEP are estimated and found to be close to the universal properties of a three-dimensional Ising model. We indicate that the critical phenomena at the itinerant-electron MM CEP in UCoAl have a common feature as a gas-liquid transition.

Original languageEnglish
Article number024428
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number2
DOIs
Publication statusPublished - Jul 23 2012
Externally publishedYes

Fingerprint

Magnetic resonance measurement
Ising model
nuclear magnetic resonance
Spin-lattice relaxation
Electrons
Magnetism
spin-lattice relaxation
nuclear spin
Phase diagrams
Magnetization
divergence
electrons
plots
Gases
phase diagrams
Nuclear magnetic resonance
exponents
magnetization
Liquids
liquids

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Universality and critical behavior at the critical endpoint in the itinerant-electron metamagnet UCoAl. / Karube, K.; Hattori, T.; Kitagawa, S.; Ishida, K.; Kimura, N.; Komatsubara, T.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 86, No. 2, 024428, 23.07.2012.

Research output: Contribution to journalArticle

Karube, K. ; Hattori, T. ; Kitagawa, S. ; Ishida, K. ; Kimura, N. ; Komatsubara, T. / Universality and critical behavior at the critical endpoint in the itinerant-electron metamagnet UCoAl. In: Physical Review B - Condensed Matter and Materials Physics. 2012 ; Vol. 86, No. 2.
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