Magnetic ordering temperatures in rare earth metal dysprosium under ultrahigh pressures
Abstract
Magnetic ordering temperatures in heavy rare earth metal Dysprosium (Dy) have been studied using an ultrasensitive electrical transport measurement technique in a designer diamond anvil cell to extreme conditions of pressure to 69 GPa and temperature to 10 K. Previous studies using magnetic susceptibility measurements at high pressures were only able to track magnetic ordering temperature till 7 GPa in the hexagonal close packed (hcp) phase of Dy. Our studies indicate that the magnetic ordering temperature shows an abrupt drop of 80 K at the hcp-Sm phase transition followed by a gradual decrease that continues till 17 GPa. This is followed by a rapid increase in the magnetic ordering temperatures in the double hexagonal close packed phase and finally leveling off in the distorted face centered cubic phase of Dy. Lastly, our studies reaffirm that 4f-shell remain localized in Dy and there is no loss of magnetic moment or 4f-shell delocalization for pressures up to 69 GPa.
- Authors:
-
- Univ. of Alabama at Birmingham, Birmingham, AL (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Univ. of Alabama, Birmingham, AL (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1251163
- Grant/Contract Number:
- NA0002014
- Resource Type:
- Accepted Manuscript
- Journal Name:
- High Pressure Research
- Additional Journal Information:
- Journal Volume: 34; Journal Issue: 2; Journal ID: ISSN 0895-7959
- Publisher:
- Taylor & Francis
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; high pressure effects in solids; magnetic ordering temperature; four probe electrical measurements; designer diamond anvils
Citation Formats
Samudrala, Gopi K., Tsoi, Georgiy M., Weir, Samuel T., and Vohra, Yogesh K. Magnetic ordering temperatures in rare earth metal dysprosium under ultrahigh pressures. United States: N. p., 2014.
Web. doi:10.1080/08957959.2014.903946.
Samudrala, Gopi K., Tsoi, Georgiy M., Weir, Samuel T., & Vohra, Yogesh K. Magnetic ordering temperatures in rare earth metal dysprosium under ultrahigh pressures. United States. https://doi.org/10.1080/08957959.2014.903946
Samudrala, Gopi K., Tsoi, Georgiy M., Weir, Samuel T., and Vohra, Yogesh K. Thu .
"Magnetic ordering temperatures in rare earth metal dysprosium under ultrahigh pressures". United States. https://doi.org/10.1080/08957959.2014.903946. https://www.osti.gov/servlets/purl/1251163.
@article{osti_1251163,
title = {Magnetic ordering temperatures in rare earth metal dysprosium under ultrahigh pressures},
author = {Samudrala, Gopi K. and Tsoi, Georgiy M. and Weir, Samuel T. and Vohra, Yogesh K.},
abstractNote = {Magnetic ordering temperatures in heavy rare earth metal Dysprosium (Dy) have been studied using an ultrasensitive electrical transport measurement technique in a designer diamond anvil cell to extreme conditions of pressure to 69 GPa and temperature to 10 K. Previous studies using magnetic susceptibility measurements at high pressures were only able to track magnetic ordering temperature till 7 GPa in the hexagonal close packed (hcp) phase of Dy. Our studies indicate that the magnetic ordering temperature shows an abrupt drop of 80 K at the hcp-Sm phase transition followed by a gradual decrease that continues till 17 GPa. This is followed by a rapid increase in the magnetic ordering temperatures in the double hexagonal close packed phase and finally leveling off in the distorted face centered cubic phase of Dy. Lastly, our studies reaffirm that 4f-shell remain localized in Dy and there is no loss of magnetic moment or 4f-shell delocalization for pressures up to 69 GPa.},
doi = {10.1080/08957959.2014.903946},
journal = {High Pressure Research},
number = 2,
volume = 34,
place = {United States},
year = {Thu Apr 03 00:00:00 EDT 2014},
month = {Thu Apr 03 00:00:00 EDT 2014}
}
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Works referencing / citing this record:
Fabrication of Diamond Based Sensors for Use in Extreme Environments
journal, April 2015
- Samudrala, Gopi; Moore, Samuel; Vohra, Yogesh
- Materials, Vol. 8, Issue 5