Journal of Low Temperature Physics

, Volume 159, Issue 1–2, pp 134–137 | Cite as

Lattice Instabilities in the Frustrated Magnet CdCr2O4: An Ultrasonic Study

  • S. Zherlitsyn
  • O. Chiatti
  • A. Sytcheva
  • J. Wosnitza
  • S. Bhattacharjee
  • R. Moessner
  • M. Zhitomirsky
  • P. Lemmens
  • V. Tsurkan
  • A. Loidl
Article

Abstract

We report results on ultrasound studies of the frustrated magnet CdCr2O4. This compound demonstrates an antiferromagnetic ordering at T N =7.8 K and a metamagnetic phase transition at 28 T followed by a wide magnetization plateau with one half of the full moment of S=3/2 of Cr3+ ions. A longitudinal acoustic mode in the [111] crystallographic direction exhibits pronounced effects both in the temperature and magnetic-field dependencies. Pulsed-field measurements show a drastic change in the sound velocity just below and above the 1/2 magnetization plateau. Our results suggest a large spin-strain coupling and give evidence for a pronounced interplay between spin and lattice degrees of freedom in CdCr2O4.

Frustrated magnets Magneto-acoustic properties 

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • S. Zherlitsyn
    • 1
  • O. Chiatti
    • 1
  • A. Sytcheva
    • 1
  • J. Wosnitza
    • 1
  • S. Bhattacharjee
    • 2
  • R. Moessner
    • 2
  • M. Zhitomirsky
    • 3
  • P. Lemmens
    • 4
  • V. Tsurkan
    • 5
    • 6
  • A. Loidl
    • 5
  1. 1.Hochfeld-Magnetlabor Dresden (HLD)Forschungszentrum Dresden-RossendorfDresdenGermany
  2. 2.Max Planck Institute for the Physics of Complex SystemsDresdenGermany
  3. 3.Commissariat á l’Energie AtomiqueGrenobleFrance
  4. 4.IPKMTechnische Universität BraunschweigBraunschweigGermany
  5. 5.Universität AugsburgAugsburgGermany
  6. 6.Institute of Applied PhysicsAcademy of Sciences of MoldovaChisinauRepublic of Moldova

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