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Title: High pressure synthesis of a new phase of YbAg2: Structure, valence of Yb and properties

The new phase of YbAg2 was obtained using high-pressure and high-temperature reaction. YbAg2 crystallizes in the MgZn2 structure (the space group P63/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) Å3. 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 T2 term that supports the Fermi-liquid picture. Furthermore, the Kadowaki–Woods relation gives a low value of the degeneracy (N = 2).
Authors:
 [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:
OSTI Identifier:
1227412
Report Number(s):
IS-J--8820
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
Type:
Accepted Manuscript
Journal Name:
Journal of Alloys and Compounds
Additional Journal Information:
Journal Volume: 650; Journal Issue: C; Journal ID: ISSN 0925-8388
Publisher:
Elsevier
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE high-pressure reaction; new phase; valence state; fermi-liquid; kadowaki-woods relation