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

Sarah A. Thomas; Jeffrey M. Montgomery; Georgiy M. Tsoi; Yogesh K. Vohra; Gary N. Chesnut; Samuel T. Weir; Christopher A. Tulk; Antonio M. Dos Santos

doi:10.1080/08957959.2013.806503

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

Sarah A. Thomas, Jeffrey M. Montgomery, Georgiy M. Tsoi, Yogesh K. Vohra, Gary N. Chesnut, Samuel T. Weir, Christopher A. Tulk, Antonio M. Dos Santos

Materials Engineering

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

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 α-Sm-type structure at high pressures.

Original language	English
Pages (from-to)	555-562
Number of pages	8
Journal	High Pressure Research
Volume	33
Issue number	3
DOIs	https://doi.org/10.1080/08957959.2013.806503
State	Published - Aug 20 2013

Funding

This material is based upon the work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0002014. Sarah A. Thomas acknowledges support from the NASA-Alabama Space Grant Consortium Graduate Fellowship program under NNX10AJ80H. Jeffery M Montgomery acknowledges the support from the Department of Education Grant No. P200A090143. A portion of this research at Oak Ridge National Laboratory’s Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy.

Funders	Funder number
NASA-Alabama	NNX10AJ80H
Scientific User Facilities Division
U.S. Department of Energy
U.S. Department of Education	P200A090143
Basic Energy Sciences
National Nuclear Security Administration	DE-NA0002014
Oak Ridge National Laboratory

Keywords

Electrical transport
High pressures-low temperatures
Magnetism
Neutron diffraction
Rare-earth metals

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10.1080/08957959.2013.806503

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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 α-Sm-type structure at high pressures.",

keywords = "Electrical transport, High pressures-low temperatures, Magnetism, Neutron diffraction, Rare-earth metals",

author = "Thomas, {Sarah A.} and Montgomery, {Jeffrey M.} and Tsoi, {Georgiy M.} and Vohra, {Yogesh K.} and Chesnut, {Gary N.} and Weir, {Samuel T.} and Tulk, {Christopher A.} and {Dos Santos}, {Antonio M.}",

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AU - Thomas, Sarah A.

AU - Montgomery, Jeffrey M.

AU - Tsoi, Georgiy M.

AU - Vohra, Yogesh K.

AU - Chesnut, Gary N.

AU - Weir, Samuel T.

AU - Tulk, Christopher A.

AU - Dos Santos, Antonio M.

PY - 2013/8/20

Y1 - 2013/8/20

N2 - 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 α-Sm-type structure at high pressures.

AB - 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 α-Sm-type structure at high pressures.

KW - Electrical transport

KW - High pressures-low temperatures

KW - Magnetism

KW - Neutron diffraction

KW - Rare-earth metals

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

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