Pressure evolution of the EFG and magnetic hyperfine field in the layered antiferromagnet FeI2

G. R. Hearne; M. P. Pasternak; R. D. Taylor

doi:10.1007/BF02069154

Pressure evolution of the EFG and magnetic hyperfine field in the layered antiferromagnet FeI₂

G. R. Hearne, M. P. Pasternak, R. D. Taylor

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

4 Citations (Scopus)

Abstract

When FeI₂ is subjected to pressures of up to 20 GPa, a change of approximately 20% occurs in the unit cell volume.⁵⁷Fe Mössbauer spectroscopy (MS) in a diamondanvil cell has been used to monitor the pressure evolution of the hyperfine interaction parameters of this layered antiferromagnetic insulator. The pressure dependence of the quadrupole splitting QS at 296 K exhibits a maximum at ∼12 GPa and the saturation magnetic hyperfine field H₀ increases from 7.4 T at ambient pressure to 12 T at 18 GPa. A qualitative analysis identifies the pressure evolution of QS with changes in the trigonal component of the crystal field splitting. The pressure variation of H₀ is attributed to an increase in the average value of the 3d charge density distribution.

Original language	English
Pages (from-to)	447-451
Number of pages	5
Journal	Hyperfine Interactions
Volume	90
Issue number	1
DOIs	https://doi.org/10.1007/BF02069154
Publication status	Published - Dec 1994
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics
Condensed Matter Physics
Physical and Theoretical Chemistry

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title = "Pressure evolution of the EFG and magnetic hyperfine field in the layered antiferromagnet FeI2",

abstract = "When FeI2 is subjected to pressures of up to 20 GPa, a change of approximately 20% occurs in the unit cell volume.57Fe M{\"o}ssbauer spectroscopy (MS) in a diamondanvil cell has been used to monitor the pressure evolution of the hyperfine interaction parameters of this layered antiferromagnetic insulator. The pressure dependence of the quadrupole splitting QS at 296 K exhibits a maximum at ∼12 GPa and the saturation magnetic hyperfine field H0 increases from 7.4 T at ambient pressure to 12 T at 18 GPa. A qualitative analysis identifies the pressure evolution of QS with changes in the trigonal component of the crystal field splitting. The pressure variation of H0 is attributed to an increase in the average value of the 3d charge density distribution.",

author = "Hearne, {G. R.} and Pasternak, {M. P.} and Taylor, {R. D.}",

year = "1994",

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T1 - Pressure evolution of the EFG and magnetic hyperfine field in the layered antiferromagnet FeI2

AU - Hearne, G. R.

AU - Pasternak, M. P.

AU - Taylor, R. D.

PY - 1994/12

Y1 - 1994/12

N2 - When FeI2 is subjected to pressures of up to 20 GPa, a change of approximately 20% occurs in the unit cell volume.57Fe Mössbauer spectroscopy (MS) in a diamondanvil cell has been used to monitor the pressure evolution of the hyperfine interaction parameters of this layered antiferromagnetic insulator. The pressure dependence of the quadrupole splitting QS at 296 K exhibits a maximum at ∼12 GPa and the saturation magnetic hyperfine field H0 increases from 7.4 T at ambient pressure to 12 T at 18 GPa. A qualitative analysis identifies the pressure evolution of QS with changes in the trigonal component of the crystal field splitting. The pressure variation of H0 is attributed to an increase in the average value of the 3d charge density distribution.

AB - When FeI2 is subjected to pressures of up to 20 GPa, a change of approximately 20% occurs in the unit cell volume.57Fe Mössbauer spectroscopy (MS) in a diamondanvil cell has been used to monitor the pressure evolution of the hyperfine interaction parameters of this layered antiferromagnetic insulator. The pressure dependence of the quadrupole splitting QS at 296 K exhibits a maximum at ∼12 GPa and the saturation magnetic hyperfine field H0 increases from 7.4 T at ambient pressure to 12 T at 18 GPa. A qualitative analysis identifies the pressure evolution of QS with changes in the trigonal component of the crystal field splitting. The pressure variation of H0 is attributed to an increase in the average value of the 3d charge density distribution.

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DO - 10.1007/BF02069154

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JO - Hyperfine Interactions

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IS - 1

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Pressure evolution of the EFG and magnetic hyperfine field in the layered antiferromagnet FeI₂

Abstract

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