On the compressibility of BaFe(2)AS(2)

J. E. Jørgensen; J. S. Olsen; Leif Gerward

doi:10.1016/j.ssc.2009.05.026

On the compressibility of BaFe(2)AS(2)

J. E. Jørgensen, J. S. Olsen, Leif Gerward

Department of Physics

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

BaFe(2)AS(2) has been studied by high-pressure energy dispersive X-ray diffraction. The compression mechanism was found to be highly anisotropic, and a tetragonal to orthorhombic phase transition was observed at about 17 GPa. The length of the a- and c-axes of the tetragonal phase is reduced by 2 and 11%, respectively, at the transition pressure. Furthermore, an increase in compressibility was observed at about 1 GPa. The zero-pressure bulk modulus was determined to be B-0 = 71(4) GPa using experimental data points in the pressure range from 1 to 16.5 GPa. The experimental results are supported by electronic structure calculations within the extended Huckel approximation.

Original language	English
Journal	Solid State Communications
Volume	149
Issue number	29-30
Pages (from-to)	1161-1163
ISSN	0038-1098
DOIs	https://doi.org/10.1016/j.ssc.2009.05.026
Publication status	Published - 2009

Keywords

High pressure
X-ray scattering
Superconductors

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title = "On the compressibility of BaFe(2)AS(2)",

abstract = "BaFe(2)AS(2) has been studied by high-pressure energy dispersive X-ray diffraction. The compression mechanism was found to be highly anisotropic, and a tetragonal to orthorhombic phase transition was observed at about 17 GPa. The length of the a- and c-axes of the tetragonal phase is reduced by 2 and 11%, respectively, at the transition pressure. Furthermore, an increase in compressibility was observed at about 1 GPa. The zero-pressure bulk modulus was determined to be B-0 = 71(4) GPa using experimental data points in the pressure range from 1 to 16.5 GPa. The experimental results are supported by electronic structure calculations within the extended Huckel approximation.",

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T1 - On the compressibility of BaFe(2)AS(2)

AU - Jørgensen, J. E.

AU - Olsen, J. S.

AU - Gerward, Leif

PY - 2009

Y1 - 2009

N2 - BaFe(2)AS(2) has been studied by high-pressure energy dispersive X-ray diffraction. The compression mechanism was found to be highly anisotropic, and a tetragonal to orthorhombic phase transition was observed at about 17 GPa. The length of the a- and c-axes of the tetragonal phase is reduced by 2 and 11%, respectively, at the transition pressure. Furthermore, an increase in compressibility was observed at about 1 GPa. The zero-pressure bulk modulus was determined to be B-0 = 71(4) GPa using experimental data points in the pressure range from 1 to 16.5 GPa. The experimental results are supported by electronic structure calculations within the extended Huckel approximation.

AB - BaFe(2)AS(2) has been studied by high-pressure energy dispersive X-ray diffraction. The compression mechanism was found to be highly anisotropic, and a tetragonal to orthorhombic phase transition was observed at about 17 GPa. The length of the a- and c-axes of the tetragonal phase is reduced by 2 and 11%, respectively, at the transition pressure. Furthermore, an increase in compressibility was observed at about 1 GPa. The zero-pressure bulk modulus was determined to be B-0 = 71(4) GPa using experimental data points in the pressure range from 1 to 16.5 GPa. The experimental results are supported by electronic structure calculations within the extended Huckel approximation.

KW - High pressure

KW - X-ray scattering

KW - Superconductors

U2 - 10.1016/j.ssc.2009.05.026

DO - 10.1016/j.ssc.2009.05.026

M3 - Journal article

SN - 0038-1098

VL - 149

SP - 1161

EP - 1163

JO - Solid State Communications

JF - Solid State Communications

IS - 29-30

ER -

On the compressibility of BaFe(2)AS(2)

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Keywords

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