High-resolution x-ray diffraction study of the heavy-fermion compound YbBiPt
- Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
- Occidental College, Los Angeles, CA (United States)
In this study, YbBiPt is a heavy-fermion compound possessing significant short-range antiferromagnetic correlations below a temperature of T*=0.7K, fragile antiferromagnetic order below TN = 0.4K, a Kondo temperature of TK ≈ 1K, and crystalline-electric-field splitting on the order of E/kB = 1 – 10K. Whereas the compound has a face-centered-cubic lattice at ambient temperature, certain experimental data, particularly those from studies aimed at determining its crystalline-electric-field scheme, suggest that the lattice distorts at lower temperature. Here, we present results from high-resolution, high-energy x-ray diffraction experiments which show that, within our experimental resolution of ≈ 6 – 10 × 10–5 Å, no structural phase transition occurs between T = 1.5 and 50 K. In combination with results from dilatometry measurements, we further show that the compound's thermal expansion has a minimum at ≈ 18 K and a region of negative thermal expansion for 9 ≲ T ≲ 18 K. Despite diffraction patterns taken at 1.6 K which indicate that the lattice is face-centered cubic and that the Yb resides on a crystallographic site with cubic point symmetry, we demonstrate that the linear thermal expansion may be modeled using crystalline-electric-field level schemes appropriate for Yb3+ residing on a site with either cubic or less than cubic point symmetry.
- Research Organization:
- Ames Lab., Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-07CH11358; DMR1408598; AC02-06CH11357
- OSTI ID:
- 1235586
- Alternate ID(s):
- OSTI ID: 1227534
- Report Number(s):
- IS-J-8891; PRBMDO
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 18; ISSN 1098-0121
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Preserved entropy and fragile magnetism
|
journal | July 2016 |
Low-temperature elastic properties of YbSbPt probed by ultrasound measurements
|
journal | March 2018 |
Preserved entropy and fragile magnetism | text | January 2016 |
Two-channel conduction in YbPtBi | text | January 2017 |
Similar Records
Physics of YbBiPt
Physics of YbBiPt