Journal of the Korean Physical Society

, Volume 63, Issue 3, pp 341–344 | Cite as

Pressure evolution of the metamagnetic transition in UCoAl As measured using 59Co NMR

  • Hisashi Kotegawa
  • Hiroki Nohara
  • Hideki Tou
  • Tatsuma D. Matsuda
  • Etsuji Yamamoto
  • Yoshinori Haga
  • Zachary Fisk
  • Yoshichika Ōnuki
  • Dai Aoki
  • Jacques Flouquet
Article
  • 33 Downloads

Abstract

We have performed NMR measurements under pressure in UCoAl with a quantum critical endpoint of the metamagnetic transition from the paramagnetic phase to the ferromagnetic (FM) phase. 59Co-NMR sensitively detects the evolution of the internal field caused by applying the external field. The metamagnetic field H m increases with increasing pressure consistently with other experimental methods, accompanied by the suppression of the magnetization in the field-induced FM phase and the magnetization jump at H m . The loss of the NMR signal on approaching the QCEP indicates the development of the spin fluctuations.

Keywords

Quantum Critical Endpoint UCoAl NMR 

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Copyright information

© The Korean Physical Society 2013

Authors and Affiliations

  • Hisashi Kotegawa
    • 1
  • Hiroki Nohara
    • 1
  • Hideki Tou
    • 1
  • Tatsuma D. Matsuda
    • 2
  • Etsuji Yamamoto
    • 2
  • Yoshinori Haga
    • 2
  • Zachary Fisk
    • 2
    • 3
  • Yoshichika Ōnuki
    • 4
  • Dai Aoki
    • 5
    • 6
  • Jacques Flouquet
    • 6
  1. 1.Department of PhysicsKobe UniversityKobeJapan
  2. 2.ASRCJAEATokai, IbarakiJapan
  3. 3.University of CaliforniaIrvineUSA
  4. 4.Graduate School of ScienceOsaka UniversityToyonaka, OsakaJapan
  5. 5.Institute for Materials ResearchTohoku UniversityOarai, IbarakiJapan
  6. 6.INAC/SPSMSCEA-GrenobleGrenobleFrance

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