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Title: Near-zero thermal expansion in magnetically ordered state in dysprosium at high pressures and low temperatures

Abstract

The atomic volume of rare earth metal Dysprosium (Dy) has been measured up to high pressures of 35 GPa and low temperatures between 200 K and 7 K in a diamond anvil cell using angle dispersive x-ray diffraction at a synchrotron source. The hexagonal close-packed (hcp), alpha-Samarium (α-Sm), and double hexagonal close packed (dhcp) phases are observed to be stable in Dy under high-pressure and low-temperature conditions achieved in our experiments. Dy is known to undergo magnetic ordering below 176 K at ambient pressure with magnetic ordering Néel temperature (T N) that changes rapidly with increasing pressure. Our experimental measurement shows that Dy has near-zero thermal expansion in the magnetically ordered state and normal thermal expansion in the paramagnetic state for all the three known high pressure phases (hcp, α-Sm, and dhcp) to 35 GPa. This near-zero thermal expansion behavior in Dy is observed below the magnetic ordering temperature T N at all pressures up to 35 GPa.

Authors:
 [1];  [2];  [2]
  1. Univ. of Montevallo, Montevallo, AL (United States). Dept. of Biology, Chemistry and Mathematics
  2. Univ. of Alabama, Birmingham, AL (United States). Dept. of Physics
Publication Date:
Research Org.:
Univ. of Alabama, Birmingham, AL (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1412680
Grant/Contract Number:  
NA0002928; NA0001974; FG02-99ER45775; AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Cogent Physics
Additional Journal Information:
Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2331-1940
Publisher:
Cogent OA
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Rare Earth Metals; High Pressures; Low Temperatures; Magnetic Ordering; Thermal Expansion

Citation Formats

Hope, Kevin M., Samudrala, Gopi K., and Vohra, Yogesh K. Near-zero thermal expansion in magnetically ordered state in dysprosium at high pressures and low temperatures. United States: N. p., 2017. Web. doi:10.1080/23311940.2017.1412107.
Hope, Kevin M., Samudrala, Gopi K., & Vohra, Yogesh K. Near-zero thermal expansion in magnetically ordered state in dysprosium at high pressures and low temperatures. United States. https://doi.org/10.1080/23311940.2017.1412107
Hope, Kevin M., Samudrala, Gopi K., and Vohra, Yogesh K. Sun . "Near-zero thermal expansion in magnetically ordered state in dysprosium at high pressures and low temperatures". United States. https://doi.org/10.1080/23311940.2017.1412107. https://www.osti.gov/servlets/purl/1412680.
@article{osti_1412680,
title = {Near-zero thermal expansion in magnetically ordered state in dysprosium at high pressures and low temperatures},
author = {Hope, Kevin M. and Samudrala, Gopi K. and Vohra, Yogesh K.},
abstractNote = {The atomic volume of rare earth metal Dysprosium (Dy) has been measured up to high pressures of 35 GPa and low temperatures between 200 K and 7 K in a diamond anvil cell using angle dispersive x-ray diffraction at a synchrotron source. The hexagonal close-packed (hcp), alpha-Samarium (α-Sm), and double hexagonal close packed (dhcp) phases are observed to be stable in Dy under high-pressure and low-temperature conditions achieved in our experiments. Dy is known to undergo magnetic ordering below 176 K at ambient pressure with magnetic ordering Néel temperature (TN) that changes rapidly with increasing pressure. Our experimental measurement shows that Dy has near-zero thermal expansion in the magnetically ordered state and normal thermal expansion in the paramagnetic state for all the three known high pressure phases (hcp, α-Sm, and dhcp) to 35 GPa. This near-zero thermal expansion behavior in Dy is observed below the magnetic ordering temperature TN at all pressures up to 35 GPa.},
doi = {10.1080/23311940.2017.1412107},
url = {https://www.osti.gov/biblio/1412680}, journal = {Cogent Physics},
issn = {2331-1940},
number = 1,
volume = 4,
place = {United States},
year = {2017},
month = {1}
}

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Works referenced in this record:

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journal, April 1963


Temperature dependence of the ruby luminescence method for measuring high pressures
journal, December 1992


Anomalous Thermal Expansion and Magnetostriction of Single-Crystal Dysprosium
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Some Magnetic and Electrical Properties of Gadolinium, Dysprosium, and Erbium Metals
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Magnetic ordering temperatures in rare earth metal dysprosium under ultrahigh pressures
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