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Title: Complex magnetism and strong electronic correlations in Ce 2 PdGe 3

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [2];  [2];  [3];  [4];  [5];  [6];  [6];  [6]
  1. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
  3. Florida A&M Univ. and Florida State Univ. College of Engineering, Tallahassee, FL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab); Florida A&M Univ. and Florida State Univ. College of Engineering, Tallahassee, FL (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  6. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Single-crystal x-ray diffraction, magnetic susceptibility, magnetization, heat capacity, and electrical resistivity measurements are reported for the new tetragonal compound Ce2PdGe3, which forms in the space group P42/mmc (No. 131)—a relative of the α₋ThSi2-type structure. Measurements reveal a two-part antiferromagnetic phase transition at TN,1=10.7 K and TN,2=9.6 K and subsequent ferromagnetlike ordering near TC≈2.25 K. The ordered ground state emerges from a lattice of Ce ions that are hybridized with the conduction electrons, as revealed by the enhanced electronic coefficient of the specific heat γ≈50 mJ/mol-Ce-K2 (extrapolated to T=0 for T < TC). Lastly, electronic structure calculations reveal a Fermi surface that includes sheets with distinct nesting vectors. We find chemical/structural disorder also plays an important role, as evidenced by results from single-crystal x-ray diffraction, the width of the peaks in the heat capacity at TN and TC, and the small residual resistivity ratio RRR=ρ300K/ρ0=1.8.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; DMR-1157490; SC0008832
OSTI ID:
1185651
Alternate ID(s):
OSTI ID: 1181350
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 3; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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Ce 2 PtGe 3 : a new ordered orthorhombic superstructure in the AlB 2 family with spin glass behavior journal January 2017

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