Valence instability across the magnetostructural transition in
Journal Article
·
· Physical Review B
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of California, Davis, CA (United States). Dept. of Physics; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- National Inst. of Standards and Technology (NIST), Boulder, CO (United States); Univ. of Maryland, College Park, MD (United States). Dept. of Physics
- Univ. of California, Davis, CA (United States). Dept. of Physics
We have performed pressure-dependent x-ray diffraction and resonant x-ray emission spectroscopy experiments on USb2 to further characterize the antiferromagnetic-ferromagnetic transition occurring near 8 GPa. We have found the magnetic transition coincides with a tetragonal to orthorhombic transition resulting in a 17% volume collapse as well as a transient f-occupation enhancement. Compared to UAs2 and UAsS, USb2 shows a reduced bulk modulus and transition pressure and an increased volume collapse at the structural transition. Except for an enhancement across the transition region, the f occupancy decreases steadily from 1.96 to 1.75.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-06CH11357; AC05-00OR22725; AC52-07NA27344
- OSTI ID:
- 1606746
- Report Number(s):
- LLNL--JRNL-772386
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 8 Vol. 101; ISSN 2469-9950; ISSN PRBMDO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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