Role of the tuning parameter at magnetic quantum phase transitions

V. Fritsch, O. Stockert, C. L. Huang, N. Bagrets, W. Kittler, C. Taubenheim, B. Pilawa, S. Woitschach, Z. Huesges, S. Lucas, A. Schneidewind, K. Grube, H. V. Löhneysen

Research output: Contribution to journalReview articlepeer-review

7 Citations (Scopus)

Abstract

Heavy-fermion systems, with their competition between Kondo and RKKY interactions, offer a rich variety of materials that may be driven to a magnetic quantum phase transition. Quite often, a quantum critical point can be approached by chemical substitution, notably of isoelectric ligands of Ce, as in CeCu6xAux and CePd1xNixAl. While in the former we compare pressure and concentration tuning of the magnetic structure, the latter has the additional feature of geometric frustration due to the distorted kagomè sublattice of Ce atoms in the basal plane. We further present the system CeAu2Ge2 where minor structural differences between crystals grown from Sn or Au-Ge flux lead to pronounced differences in the magnetic structure, with several field-induced phases in samples grown from Au-Ge flux. Finally, non-isoelectronic substitution of Ti by V is studied in CeTi1xVxGe3 where CeTiGe3 is a ferromagnet, thus allowing the study of ferromagnetic quantum criticality, a rare case for heavyfermion systems.

Original languageEnglish
Article numberA003
Pages (from-to)997-1019
Number of pages23
JournalEuropean Physical Journal: Special Topics
Volume224
Issue number6
DOIs
Publication statusPublished - 2015 Jul 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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