Pressure and magnetic field tuned quantum critical point in the Kondo antiferromagnet CePtZn

S. K. Dhar, R. Kulkarni, H. Hidaka, Y. Toda, H. Kotegawa, T. C. Kobayashi, P. Manfrinetti, A. Provino

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12 Citations (Scopus)

Abstract

We report magnetization, heat capacity and electrical resistivity measurements on CePtZn, which crystallizes in the orthorhombic TiNiSi type structure. Magnetization and electrical resistivity on the iso-structural series of compounds Ce1-xLaxPtZn (x = 0.1, 0.2 0.5 and 1) were also carried out. The electrical resistivity of CePtZn was also measured in external magnetic fields up to 12T and under pressures up to 2.66GPa. We find that CePtZn is a dense Kondo lattice, ordering antiferromagnetically at T N = 1.7K, with a comparable Kondo temperature. The magnetic transition temperature, TN, is continuously suppressed both by the magnetic field and pressure and around 5-6T and at 1.2GPa, respectively. Non-Fermi liquid behavior of resistivity at 4T and 1.2GPa and logarithmic divergence of the heat capacity, C4f/T, at 6T in a limited temperature region strongly suggest the emergence of a quantum critical point as .

Original languageEnglish
Article number156001
JournalJournal of Physics Condensed Matter
Volume21
Issue number15
DOIs
Publication statusPublished - May 18 2009

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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