Observation of two distinct magnetic states in ZrZn2 via the dHvA effect under pressure

N. Kimura, M. Endo, T. Isshiki, A. Ochiai, Hayuyoshi Aoki, T. Terashima, S. Uji, T. Matsumoto, G. G. Lonzarich

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We have found an anomaly in magnetic field dependence of the de Haas-van Alphen (dHvA) frequency of ZrZn2. Pressure dependence of this anomaly suggests an existence of two distinct ferromagnetic states and then a "nested" phase diagram similar to that of UGe2. The Stoner exchange parameter and the exchange splitting energy are 400 and 66 meV, respectively, which are derived from comparing the field dependence of the dHvA frequency difference with the magnetization. The two parameters do not change in both the low and slightly higher average moment states, suggesting that the phase transition between these states is ascribed to the change in the difference of majority and minority spin carrier densities.

Original languageEnglish
Pages (from-to)1189-1191
Number of pages3
JournalPhysica B: Condensed Matter
Volume359-361
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2005 Apr 30

Keywords

  • Ferromagnetic superconductor
  • ZrZn
  • dHvA effect

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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