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Title: Magnetic and structural phase transitions in erbium at low temperatures and high pressures

Abstract

Electrical resistance and crystal structure measurements have been carried out on polycrystalline erbium (Er) at temperatures down to 10 K and pressures up to 20 GPa. An abrupt change in the slope of the resistance is observed with decreasing temperature below 84 K, which is associated with the c-axis modulated (CAM) antiferromagnetic (AFM) ordering of the Er moments. With increasing pressure the temperature of the resistance slope change and the corresponding AFM ordering temperature decrease until vanishing above 10.6 GPa. The disappearance of the slope change in the resistance occurs at similar pressures where the hcp structural phase of Er is transformed to a nine-layer {alpha}-Sm structural phase, as confirmed by our high-pressure synchrotron x-ray diffraction studies. These results suggest that the disappearance in the AFM ordering of Er moments is strongly correlated to the structural phase transition at high pressures and low temperatures.

Authors:
; ; ;  [1]
  1. UAB
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
NNSANASA
OSTI Identifier:
1029013
Resource Type:
Journal Article
Journal Name:
Phys. Rev. B
Additional Journal Information:
Journal Volume: 84; Journal Issue: (14) ; 10, 2011; Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
ENGLISH
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CRYSTAL STRUCTURE; ELECTRIC CONDUCTIVITY; ERBIUM; SYNCHROTRONS; X-RAY DIFFRACTION

Citation Formats

Thomas, Sarah A, Tsoi, Georgiy M, Wenger, Lowell E, and Vohra, Yogesh K. Magnetic and structural phase transitions in erbium at low temperatures and high pressures. United States: N. p., 2012. Web. doi:10.1103/PhysRevB.84.144415.
Thomas, Sarah A, Tsoi, Georgiy M, Wenger, Lowell E, & Vohra, Yogesh K. Magnetic and structural phase transitions in erbium at low temperatures and high pressures. United States. doi:10.1103/PhysRevB.84.144415.
Thomas, Sarah A, Tsoi, Georgiy M, Wenger, Lowell E, and Vohra, Yogesh K. Tue . "Magnetic and structural phase transitions in erbium at low temperatures and high pressures". United States. doi:10.1103/PhysRevB.84.144415.
@article{osti_1029013,
title = {Magnetic and structural phase transitions in erbium at low temperatures and high pressures},
author = {Thomas, Sarah A and Tsoi, Georgiy M and Wenger, Lowell E and Vohra, Yogesh K},
abstractNote = {Electrical resistance and crystal structure measurements have been carried out on polycrystalline erbium (Er) at temperatures down to 10 K and pressures up to 20 GPa. An abrupt change in the slope of the resistance is observed with decreasing temperature below 84 K, which is associated with the c-axis modulated (CAM) antiferromagnetic (AFM) ordering of the Er moments. With increasing pressure the temperature of the resistance slope change and the corresponding AFM ordering temperature decrease until vanishing above 10.6 GPa. The disappearance of the slope change in the resistance occurs at similar pressures where the hcp structural phase of Er is transformed to a nine-layer {alpha}-Sm structural phase, as confirmed by our high-pressure synchrotron x-ray diffraction studies. These results suggest that the disappearance in the AFM ordering of Er moments is strongly correlated to the structural phase transition at high pressures and low temperatures.},
doi = {10.1103/PhysRevB.84.144415},
journal = {Phys. Rev. B},
issn = {1098-0121},
number = (14) ; 10, 2011,
volume = 84,
place = {United States},
year = {2012},
month = {2}
}