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Title: Neutron diffraction and electrical transport studies on magnetic ordering in terbium at high pressures and low temperatures

Abstract

Neutron diffraction and electrical transport measurements have been carried out on the heavy rare-earth metal terbium at high pressures and low temperatures in order to elucidate the onset of ferromagnetic (FM) order as a function of pressure. The electrical resistance measurements show a change in slope as the temperature is lowered through the FM Curie temperature. The temperature of this FM transition decreases at a rate of-16.7 K/GPa up to a pressure of 3.6 GPa, at which point the onset of FM order is suppressed. The neutron diffraction measurements as a function of pressure at temperatures ranging from 90 to 290 K confirm that the change of slope in the resistance is associated with the FM ordering, since this occurs at pressures similar to those determined from the resistance results at these temperatures. A disappearance of FM ordering was observed as the pressure is increased above 3.6 GPa and is correlated with the phase transition from the ambient hexagonal close packed structure to an -Sm-type structure at high pressures.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2];  [3];  [3]
  1. University of Alabama, Birmingham
  2. Lawrence Livermore National Laboratory (LLNL)
  3. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1116500
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
High Pressure Research
Additional Journal Information:
Journal Volume: 33; Journal Issue: 3; Journal ID: ISSN 0895--7959
Country of Publication:
United States
Language:
English
Subject:
High Pressure; neutron diffraction; Terbium

Citation Formats

Thomas, Sarah, Montgomery, Jeffrey M, Tsoi, Georgiy, Vohra, Yogesh, Chesnut, Gary Neal, Weir, S. T., Tulk, Christopher A, and Moreira Dos Santos, Antonio F. Neutron diffraction and electrical transport studies on magnetic ordering in terbium at high pressures and low temperatures. United States: N. p., 2013. Web. doi:10.1080/08957959.2013.806503.
Thomas, Sarah, Montgomery, Jeffrey M, Tsoi, Georgiy, Vohra, Yogesh, Chesnut, Gary Neal, Weir, S. T., Tulk, Christopher A, & Moreira Dos Santos, Antonio F. Neutron diffraction and electrical transport studies on magnetic ordering in terbium at high pressures and low temperatures. United States. doi:10.1080/08957959.2013.806503.
Thomas, Sarah, Montgomery, Jeffrey M, Tsoi, Georgiy, Vohra, Yogesh, Chesnut, Gary Neal, Weir, S. T., Tulk, Christopher A, and Moreira Dos Santos, Antonio F. Tue . "Neutron diffraction and electrical transport studies on magnetic ordering in terbium at high pressures and low temperatures". United States. doi:10.1080/08957959.2013.806503.
@article{osti_1116500,
title = {Neutron diffraction and electrical transport studies on magnetic ordering in terbium at high pressures and low temperatures},
author = {Thomas, Sarah and Montgomery, Jeffrey M and Tsoi, Georgiy and Vohra, Yogesh and Chesnut, Gary Neal and Weir, S. T. and Tulk, Christopher A and Moreira Dos Santos, Antonio F},
abstractNote = {Neutron diffraction and electrical transport measurements have been carried out on the heavy rare-earth metal terbium at high pressures and low temperatures in order to elucidate the onset of ferromagnetic (FM) order as a function of pressure. The electrical resistance measurements show a change in slope as the temperature is lowered through the FM Curie temperature. The temperature of this FM transition decreases at a rate of-16.7 K/GPa up to a pressure of 3.6 GPa, at which point the onset of FM order is suppressed. The neutron diffraction measurements as a function of pressure at temperatures ranging from 90 to 290 K confirm that the change of slope in the resistance is associated with the FM ordering, since this occurs at pressures similar to those determined from the resistance results at these temperatures. A disappearance of FM ordering was observed as the pressure is increased above 3.6 GPa and is correlated with the phase transition from the ambient hexagonal close packed structure to an -Sm-type structure at high pressures.},
doi = {10.1080/08957959.2013.806503},
journal = {High Pressure Research},
issn = {0895--7959},
number = 3,
volume = 33,
place = {United States},
year = {2013},
month = {1}
}