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Magnetic ordering in rare earth metal dysprosium revealed by neutron diffraction studies in a large-volume diamond anvil cell
Abstract
A high-pressure low-temperature neutron diffraction study has been carried out on rare earth metal Dysprosium (Dy) to 10.8 GPa and 8 K in a large-volume diamond anvil cell using a spallation neutron source. Dy crystallizes in an ambient pressure hexagonal close packed phase and forms an incommensurate helical antiferromagnetic phase, marked by the appearance of superlattice magnetic peaks below 176 K with a turn-angle between the hexagonal layers that increases both with increasing temperature and pressure. The ferromagnetic transition below 87 K is marked by an increase in intensity of nuclear peaks with disappearance of magnetic superlattice reflections. Dy transforms to an alpha-Samarium ( α-Sm) phase at 7 GPa and only ferromagnetic ordering is observed for this high pressure phase. Here, the ferromagnetic transition is observed at 59 K in the α-Sm phase at 10.8 GPa in close agreement with the magnetic ordering temperature obtained from electrical transport measurements. In the entire pressure-temperature range of this study, Dy shows a negative thermal expansion coefficient of as much as -2.5 % in the magnetically ordered phases between 200 K and 8 K.
- Authors:
-
- Univ. of Alabama at Birmingham, Birmingham, AL (United States). Dept. of Physics
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Div.
- Publication Date:
- Research Org.:
- Univ. of Alabama at Birmingham, Birmingham, AL (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- Contributing Org.:
- University of Alabama at Birmingham
- OSTI Identifier:
- 1573903
- Grant/Contract Number:
- NA0003916
- Resource Type:
- Accepted Manuscript
- Journal Name:
- High Pressure Research
- Additional Journal Information:
- Journal Name: High Pressure Research; Journal ID: ISSN 0895-7959
- Publisher:
- Taylor & Francis
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Magnetic Ordering; Rare Earth Metals; Neutron Diffraction; High Pressure
Citation Formats
Perreault, Christopher, Vohra, Yogesh K., dos Santos, Antonio M., Molaison, Jamie J., and Boehler, Reinhard. Magnetic ordering in rare earth metal dysprosium revealed by neutron diffraction studies in a large-volume diamond anvil cell. United States: N. p., 2019.
Web. doi:10.1080/08957959.2019.1688800.
Perreault, Christopher, Vohra, Yogesh K., dos Santos, Antonio M., Molaison, Jamie J., & Boehler, Reinhard. Magnetic ordering in rare earth metal dysprosium revealed by neutron diffraction studies in a large-volume diamond anvil cell. United States. doi:10.1080/08957959.2019.1688800.
Perreault, Christopher, Vohra, Yogesh K., dos Santos, Antonio M., Molaison, Jamie J., and Boehler, Reinhard. Mon .
"Magnetic ordering in rare earth metal dysprosium revealed by neutron diffraction studies in a large-volume diamond anvil cell". United States. doi:10.1080/08957959.2019.1688800.
@article{osti_1573903,
title = {Magnetic ordering in rare earth metal dysprosium revealed by neutron diffraction studies in a large-volume diamond anvil cell},
author = {Perreault, Christopher and Vohra, Yogesh K. and dos Santos, Antonio M. and Molaison, Jamie J. and Boehler, Reinhard},
abstractNote = {A high-pressure low-temperature neutron diffraction study has been carried out on rare earth metal Dysprosium (Dy) to 10.8 GPa and 8 K in a large-volume diamond anvil cell using a spallation neutron source. Dy crystallizes in an ambient pressure hexagonal close packed phase and forms an incommensurate helical antiferromagnetic phase, marked by the appearance of superlattice magnetic peaks below 176 K with a turn-angle between the hexagonal layers that increases both with increasing temperature and pressure. The ferromagnetic transition below 87 K is marked by an increase in intensity of nuclear peaks with disappearance of magnetic superlattice reflections. Dy transforms to an alpha-Samarium (α-Sm) phase at 7 GPa and only ferromagnetic ordering is observed for this high pressure phase. Here, the ferromagnetic transition is observed at 59 K in the α-Sm phase at 10.8 GPa in close agreement with the magnetic ordering temperature obtained from electrical transport measurements. In the entire pressure-temperature range of this study, Dy shows a negative thermal expansion coefficient of as much as -2.5 % in the magnetically ordered phases between 200 K and 8 K.},
doi = {10.1080/08957959.2019.1688800},
journal = {High Pressure Research},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {11}
}
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