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Title: Antiferromagnetic Kondo lattice in the layered compound CePd1-xBi2 and comparison to the superconductor LaPd1-xBi2

ZrCuSi2-type CePd1-xBi2 crystals were obtained from excess Bi flux. Magnetic susceptibility measurements reveal that CePd1-xBi2 is a highly anisotropic antiferromagnet with transition temperature at 6 K, and a magnetic-field-induced metamagnetic transition at 5 T. An enhanced Sommerfeld coefficient of γ of 0.199 J-mol-Ce-1K-2 obtained from specific heat measurements suggests a moderate Kondo effect in CePd1-xBi2. In addition to the antiferromagnetic peak the resistivity curve shows a shoulder-like behavior which could be attributed to the presence of Kondo effect and crystal-electric-field effects in this compound. Magnetoresistance and Hall effect measurements suggest an interplay between Kondo and crystal-electric-field effects which reconstructs the Fermi surface topology of CePd1-xBi2 around 75 K. Electronic structure calculations reveal the Pd vacancies are important to the magnetic structure and enhance the crystal-electric-field effects which quench the orbital moment of Ce at low temperatures.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [3] ;  [1] ;  [4] ;  [1] ;  [1] ;  [3]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  2. Nanjing Univ. (China). National Lab. of Solid State Microstructures
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Univ. of Chicago, IL (United States). James Franck Inst. and Dept. of Physics
Publication Date:
OSTI Identifier:
1355774
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 4; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Natural Science Foundation of China (NSFC)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY