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Title: High pressure synthesis of a new phase of YbAg 2: Structure, valence of Yb and properties

The new phase of YbAg 2 was obtained using high-pressure and high-temperature reaction. YbAg 2 crystallizes in the MgZn 2 structure (the space group P6 3/mmc space group, No 194) with a = 5.68153(3) Å and c = 9.31995(7) Å and the unit cell volume V = 260.54(3) Å 3. The XANES analysis showed that the valence state of Yb is +2.8. The low-temperature dependences of the electrical resistivity and magnetic susceptibility can be adequately described by a T 2 term that supports the Fermi-liquid picture. Furthermore, the Kadowaki–Woods relation gives a low value of the degeneracy (N = 2).
 [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [6]
  1. Russian Academy of Sciences (RAS), Troitsk (Russian)
  2. Moscow Engineering Physics Inst., Moscow (Russian)
  3. Russian Academy of Sciences (RAS), Moscow (Russian Federation); Moscow Inst. for Physics and Technology (Russian Federation)
  4. Russian Academy of Sciences (RAS), Moscow (Russian Federation)
  5. Iowa State Univ., Ames, IA (United States)
  6. Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
Publication Date:
Report Number(s):
Journal ID: ISSN 0925-8388; PII: S0925838815303236
Grant/Contract Number:
14-02-00001; 14-22-01002-ofi_m; RSF-14-22-00093; 91321207; 11427805; DE-AC02-07CH11358; AC02-07CH11358
Accepted Manuscript
Journal Name:
Journal of Alloys and Compounds
Additional Journal Information:
Journal Volume: 650; Journal Issue: C; Journal ID: ISSN 0925-8388
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
36 MATERIALS SCIENCE; high-pressure reaction; new phase; valence state; fermi-liquid; kadowaki-woods relation
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1250204