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Tuning the magnetic ground state of Ce1-x YbxRhIn5 by Yb valence fluctuations

Journal Article · · Physical Review B
 [1];  [2];  [2];  [3];  [4];  [4];  [5];  [6];  [7];  [2]
  1. Univ. of California, San Diego, La Jolla, CA (United States); Univ. of California, Berkeley, CA (United States); DOE/OSTI
  2. Univ. of California, San Diego, La Jolla, CA (United States)
  3. Univ. of California, San Diego, La Jolla, CA (United States); Central Washington Univ., Ellensburg, WA (United States)
  4. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  5. Rochester Inst. of Technology, Rochester, NY (United States); Univ. of Maryland, College Park, MD (United States)
  6. Univ. of California, San Diego, La Jolla, CA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  7. Univ. of California, Santa Cruz, CA (United States)
+ Show Author Affiliations
We characterize the properties of Ce1–x Ybx RhIn5 single crystals with 0 ≤ x ≤ 1 using measurements of powder x-ray diffraction, energy dispersive x-ray spectroscopy, electrical resistivity, magnetic susceptibility, specific heat, x-ray absorption near edge structure (XANES), and neutron diffraction. Here, the Yb valence v Yb , calculated from the magnetic susceptibility and measured using XANES, decreases from 3+ at x = 0 to ~2.1+ at xact = 0.2 , where xact is the measured Yb concentration. A transition from incommensurate to commensurate antiferromagnetism is observed in neutron diffraction measurements along Q = (0.5, 0.5, l) between 0.2 ≤ x act ≤ 0.27; this narrative is supported by specific-heat measurements in which a second robust feature appears at a temperature TI (TI < TN) for the same concentration range. Magnetic susceptibility measurements also reveal features which provide additional evidence of magneticordering. The results of this study suggest that the evolution of the Yb valence plays a critical role in tuning the magnetic ground state of Ce1–x Ybx RhIn5.
Research Organization:
Univ. of California, San Diego, CA (United States)
Sponsoring Organization:
National Science Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
FG02-04ER46105
OSTI ID:
1609540
Alternate ID(s):
OSTI ID: 1482425
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 19 Vol. 98; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (14)

FIG. 1(p. 4)figure FIG. 1
FIG. 2(p. 5)figure FIG. 2
FIG. 3(p. 5)figure FIG. 3
FIG. 4(p. 6)figure FIG. 4
FIG. 5(p. 6)figure FIG. 5
FIG. 6(p. 6)figure FIG. 6
FIG. 7(p. 7)figure FIG. 7
FIG. 8(p. 7)figure FIG. 8
FIG. 10(p. 8)figure FIG. 10
FIG. 9(p. 8)figure FIG. 9
FIG. 11(p. 9)figure FIG. 11
FIG. 12(p. 10)figure FIG. 12
FIG. 13(p. 12)figure FIG. 13
FIG. 14(p. 13)figure FIG. 14

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Kondo effect
heavy-fermion systems
magnetic order
materials science
physics
strongly correlated systems