Inelastic neutron scattering study of Ni-substituted Ce 0.5Fe4Sb12 skutterudite compounds

L. Girard; D. T. Adroja; L. Chapon; J. W. Taylor; R. Viennois; D. Ravot; S. Paschen

doi:10.1088/1742-6596/391/1/012013

Inelastic neutron scattering study of Ni-substituted Ce _0.5Fe₄Sb₁₂ skutterudite compounds

L. Girard, D. T. Adroja, L. Chapon, J. W. Taylor, R. Viennois, D. Ravot, S. Paschen

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

Abstract

An inelastic neutron scattering study of the filled and partially-filled skutterudite compounds RFe4Sb12 and R0.5Fe2.75Ni1.25Sb12 (where R Ce and La) was carried out to understand the nature of the spin dynamics. Strong magnetic scattering was observed in Ce0.5Fe2.75Ni1.25Sb12 at ∼ 5 meV. The integrated intensity of this peak does not follow the Ce³⁺ form factor, but exhibits a maximum at a momentum transfer (|Q|) of 2 Å^-1. We attribute this feature to a Ce³⁺ crystal field excitation in the presence of magnetic exchange interactions. This picture is supported by thermodynamic and magnetic properties. Finally, we confirm the presence of a spin gap in CeFe4Sb12 suggested by our previous work.

Original language	English
Article number	012013
Journal	Journal of Physics: Conference Series
Volume	391
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/391/1/012013
Publication status	Published - 2012
Externally published	Yes
Event	International Conference on Strongly Correlated Electron Systems, SCES 2011 - Cambridge, United Kingdom Duration: 29 Aug 2011 → 3 Sept 2011

ASJC Scopus subject areas

General Physics and Astronomy

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10.1088/1742-6596/391/1/012013

Cite this

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title = "Inelastic neutron scattering study of Ni-substituted Ce 0.5Fe4Sb12 skutterudite compounds",

abstract = "An inelastic neutron scattering study of the filled and partially-filled skutterudite compounds RFe4Sb12 and R0.5Fe2.75Ni1.25Sb12 (where R Ce and La) was carried out to understand the nature of the spin dynamics. Strong magnetic scattering was observed in Ce0.5Fe2.75Ni1.25Sb12 at ∼ 5 meV. The integrated intensity of this peak does not follow the Ce3+ form factor, but exhibits a maximum at a momentum transfer (|Q|) of 2 {\AA}-1. We attribute this feature to a Ce3+ crystal field excitation in the presence of magnetic exchange interactions. This picture is supported by thermodynamic and magnetic properties. Finally, we confirm the presence of a spin gap in CeFe4Sb12 suggested by our previous work.",

author = "L. Girard and Adroja, {D. T.} and L. Chapon and Taylor, {J. W.} and R. Viennois and D. Ravot and S. Paschen",

year = "2012",

doi = "10.1088/1742-6596/391/1/012013",

language = "English",

volume = "391",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

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note = "International Conference on Strongly Correlated Electron Systems, SCES 2011 ; Conference date: 29-08-2011 Through 03-09-2011",

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TY - JOUR

T1 - Inelastic neutron scattering study of Ni-substituted Ce 0.5Fe4Sb12 skutterudite compounds

AU - Girard, L.

AU - Adroja, D. T.

AU - Chapon, L.

AU - Taylor, J. W.

AU - Viennois, R.

AU - Ravot, D.

AU - Paschen, S.

PY - 2012

Y1 - 2012

N2 - An inelastic neutron scattering study of the filled and partially-filled skutterudite compounds RFe4Sb12 and R0.5Fe2.75Ni1.25Sb12 (where R Ce and La) was carried out to understand the nature of the spin dynamics. Strong magnetic scattering was observed in Ce0.5Fe2.75Ni1.25Sb12 at ∼ 5 meV. The integrated intensity of this peak does not follow the Ce3+ form factor, but exhibits a maximum at a momentum transfer (|Q|) of 2 Å-1. We attribute this feature to a Ce3+ crystal field excitation in the presence of magnetic exchange interactions. This picture is supported by thermodynamic and magnetic properties. Finally, we confirm the presence of a spin gap in CeFe4Sb12 suggested by our previous work.

AB - An inelastic neutron scattering study of the filled and partially-filled skutterudite compounds RFe4Sb12 and R0.5Fe2.75Ni1.25Sb12 (where R Ce and La) was carried out to understand the nature of the spin dynamics. Strong magnetic scattering was observed in Ce0.5Fe2.75Ni1.25Sb12 at ∼ 5 meV. The integrated intensity of this peak does not follow the Ce3+ form factor, but exhibits a maximum at a momentum transfer (|Q|) of 2 Å-1. We attribute this feature to a Ce3+ crystal field excitation in the presence of magnetic exchange interactions. This picture is supported by thermodynamic and magnetic properties. Finally, we confirm the presence of a spin gap in CeFe4Sb12 suggested by our previous work.

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U2 - 10.1088/1742-6596/391/1/012013

DO - 10.1088/1742-6596/391/1/012013

M3 - Conference article

AN - SCOPUS:84874904951

SN - 1742-6588

VL - 391

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 1

M1 - 012013

T2 - International Conference on Strongly Correlated Electron Systems, SCES 2011

Y2 - 29 August 2011 through 3 September 2011

ER -

Inelastic neutron scattering study of Ni-substituted Ce _0.5Fe₄Sb₁₂ skutterudite compounds

Abstract

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