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Title: The effect of Au and Ni doping on the heavy fermion state of the Kondo lattice antiferromagnet CePtZn

We have probed the effect of doping CePtZn with Au and Ni and also investigated in detail the magnetic behavior of the iso-structural CeAuZn. A magnetic ground state is observed in both CePt{sub 0.9}Au{sub 0.1}Zn and CePt{sub 0.9}Ni{sub 0.1}Zn with T{sub N} = 2.1 and 1.1 K and the coefficient of the linear term of electronic heat capacity γ = 0.34 and 0.9 J/mol K{sup 2}, respectively. The corresponding values for CePtZn are 1.7 K and 0.6 J/mol K{sup 2}. The altered values of T{sub N} and γ show that the electronic correlations in CePtZn are affected by doping with Au and Ni. CeAuZn orders magnetically near 1.7 K and its electrical resistivity shows a normal metallic behavior. Together with a γ of 0.022 J/mol K{sup 2} the data indicate a weak 4f-conduction electron hybridization in CeAuZn characteristic of normal trivalent cerium based systems.
Authors:
 [1] ; ; ;  [2] ; ;  [3]
  1. DCMPMS, T.I.F.R., Homi Bhabha Road, Colaba, Mumbai 400005 (India)
  2. Department of Physics, Tokyo Metropolitan University, Minami-Ohsawa 1-1, Hachioji-Shi, Tokyo (Japan)
  3. Departimento Physica Chemicale, Universita di Genova, Via Dodecaneso, 16146 Genova (Italy)
Publication Date:
OSTI Identifier:
22273914
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CERIUM; CORRELATIONS; ELECTRIC CONDUCTIVITY; ELECTRONS; GOLD; GROUND STATES; INTERMETALLIC COMPOUNDS; NEEL TEMPERATURE; NICKEL; PLATINUM; SPECIFIC HEAT; ZINC