Negative thermal expansion and magnetoelastic coupling in the breathing pyrochlore lattice material
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Technologies Division
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division; Univ. of Maryland, College Park, MD (United States). Dept. of Materials Science and Engineering; National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). NIST Center for Neutron Research
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy. Dept. of Materials Science and Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division. Neutron Scattering Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
In this paper, the physical properties of the spinel LiGaCr4S8 have been studied with neutron diffraction, x-ray diffraction, magnetic susceptibility, and heat capacity measurements. The neutron diffraction and synchrotron x-ray diffraction data reveal negative thermal expansion (NTE) below 111(4) K. The magnetic susceptibility deviates from Curie-Weiss behavior with the onset of NTE. At low temperature a broad peak in the magnetic susceptibility at 10.3(3) K is accompanied by the return of normal thermal expansion. First-principles calculations find a strong coupling between the lattice and the simulated magnetic ground state. Finally, these results indicate strong magnetoelastic coupling in LiGaCr4S8.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundation (United States)
- Grant/Contract Number:
- AC05-00OR22725; AC02-06CH11357; GBMF4416
- OSTI ID:
- 1435213
- Alternate ID(s):
- OSTI ID: 1435378
- Journal Information:
- Physical Review B, Vol. 97, Issue 13; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Breathing chromium spinels: a showcase for a variety of pyrochlore Heisenberg Hamiltonians
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journal | December 2019 |
Formation of breathing pyrochlore lattices: structural, thermodynamic and crystal chemical aspects
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journal | January 2020 |
Spin ordering induced by lattice distortions in classical Heisenberg antiferromagnets on the breathing pyrochlore lattice
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journal | April 2019 |
Breathing chromium spinels: a showcase for a variety of pyrochlore Heisenberg Hamiltonians
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text | January 2019 |
Behavior of the breathing pyrochlore lattice Ba$_3$Yb$_2$Zn$_5$O$_{11}$ in applied magnetic field | text | January 2018 |
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