Zero thermal expansion in YbGaGe due to an electronic valence transition

James R. Salvador; Fu Guo; Tim Hogan; Mercouri G. Kanatzidis

doi:10.1038/nature02011

Zero thermal expansion in YbGaGe due to an electronic valence transition

James R. Salvador, Fu Guo, Tim Hogan, Mercouri G. Kanatzidis^*

^*Corresponding author for this work

Chemistry

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

210 Scopus citations

Abstract

Most materials expand upon heating. Although rare, some materials expand on cooling, and are said to exhibit negative thermal expansion (NTE); but the property is exhibited in only one crystallographic direction. Such materials include silicon and germanium at very low temperature (<100 K) and, at room temperature, glasses in the titania-silica family, Kevlar, carbon fibres, anisotropic Invar Fe-Ni alloys, ZrW₂O₃ (ref. 4) and certain molecular networks. NTE materials can be combined with materials demonstrating a positive thermal expansion coefficient to fabricate composites exhibiting an overall zero thermal expansion (ZTE). ZTE materials are useful because they do not undergo thermal shock on rapid heating or cooling. The need for such composites could be avoided if ZTE materials were available in a pure form. Here we show that an electrically conductive intermetallic compound, YbGaGe, can exhibit nearly ZTE-that is, negligible volume change between 100 and 400 K. We suggest that this response is due to a temperature-induced valence transition in the Yb atoms. ZTE materials are desirable to prevent or reduce resulting strain or internal stresses in systems subject to large temperature fluctuations, such as in space applications and thermomechanical actuators.

Original language	English (US)
Pages (from-to)	702-705
Number of pages	4
Journal	Nature
Volume	425
Issue number	6959
DOIs	https://doi.org/10.1038/nature02011
State	Published - Oct 16 2003

Funding

Acknowledgements We thank E. Rizzo, S. Tognin, A. Donadini, A. M. Barbieri and L. Castelli for technical advice; for providing salt-washed purified ribosomal subunits, we thank T. Pestova. For sharing reagents, information and critical advice, we thank A. Bachi, T.-A. Sato, F. Loreni, F. Amaldi, P. Linder, J. Traugh, A. Johnson, A. Hinnebusch, A. Burlando, L. Spremulli, E. Villa, J. Verdiere, D. Ron, T. Dever, C. Groft and M. Foiani. This work was supported by AIRC, MURST (P.C.M., S.B.). This study was carried out under the framework of the Italian MUIR Center of Excellence in Physiopathology of Cell Differentiation. Financial support from the Department of Energy is gratefully

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10.1038/nature02011

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title = "Zero thermal expansion in YbGaGe due to an electronic valence transition",

abstract = "Most materials expand upon heating. Although rare, some materials expand on cooling, and are said to exhibit negative thermal expansion (NTE); but the property is exhibited in only one crystallographic direction. Such materials include silicon and germanium at very low temperature (<100 K) and, at room temperature, glasses in the titania-silica family, Kevlar, carbon fibres, anisotropic Invar Fe-Ni alloys, ZrW2O3 (ref. 4) and certain molecular networks. NTE materials can be combined with materials demonstrating a positive thermal expansion coefficient to fabricate composites exhibiting an overall zero thermal expansion (ZTE). ZTE materials are useful because they do not undergo thermal shock on rapid heating or cooling. The need for such composites could be avoided if ZTE materials were available in a pure form. Here we show that an electrically conductive intermetallic compound, YbGaGe, can exhibit nearly ZTE-that is, negligible volume change between 100 and 400 K. We suggest that this response is due to a temperature-induced valence transition in the Yb atoms. ZTE materials are desirable to prevent or reduce resulting strain or internal stresses in systems subject to large temperature fluctuations, such as in space applications and thermomechanical actuators.",

author = "Salvador, {James R.} and Fu Guo and Tim Hogan and Kanatzidis, {Mercouri G.}",

note = "Funding Information: Acknowledgements We thank E. Rizzo, S. Tognin, A. Donadini, A. M. Barbieri and L. Castelli for technical advice; for providing salt-washed purified ribosomal subunits, we thank T. Pestova. For sharing reagents, information and critical advice, we thank A. Bachi, T.-A. Sato, F. Loreni, F. Amaldi, P. Linder, J. Traugh, A. Johnson, A. Hinnebusch, A. Burlando, L. Spremulli, E. Villa, J. Verdiere, D. Ron, T. Dever, C. Groft and M. Foiani. This work was supported by AIRC, MURST (P.C.M., S.B.). This study was carried out under the framework of the Italian MUIR Center of Excellence in Physiopathology of Cell Differentiation. Funding Information: Financial support from the Department of Energy is gratefully",

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AU - Salvador, James R.

AU - Guo, Fu

AU - Hogan, Tim

AU - Kanatzidis, Mercouri G.

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N2 - Most materials expand upon heating. Although rare, some materials expand on cooling, and are said to exhibit negative thermal expansion (NTE); but the property is exhibited in only one crystallographic direction. Such materials include silicon and germanium at very low temperature (<100 K) and, at room temperature, glasses in the titania-silica family, Kevlar, carbon fibres, anisotropic Invar Fe-Ni alloys, ZrW2O3 (ref. 4) and certain molecular networks. NTE materials can be combined with materials demonstrating a positive thermal expansion coefficient to fabricate composites exhibiting an overall zero thermal expansion (ZTE). ZTE materials are useful because they do not undergo thermal shock on rapid heating or cooling. The need for such composites could be avoided if ZTE materials were available in a pure form. Here we show that an electrically conductive intermetallic compound, YbGaGe, can exhibit nearly ZTE-that is, negligible volume change between 100 and 400 K. We suggest that this response is due to a temperature-induced valence transition in the Yb atoms. ZTE materials are desirable to prevent or reduce resulting strain or internal stresses in systems subject to large temperature fluctuations, such as in space applications and thermomechanical actuators.

AB - Most materials expand upon heating. Although rare, some materials expand on cooling, and are said to exhibit negative thermal expansion (NTE); but the property is exhibited in only one crystallographic direction. Such materials include silicon and germanium at very low temperature (<100 K) and, at room temperature, glasses in the titania-silica family, Kevlar, carbon fibres, anisotropic Invar Fe-Ni alloys, ZrW2O3 (ref. 4) and certain molecular networks. NTE materials can be combined with materials demonstrating a positive thermal expansion coefficient to fabricate composites exhibiting an overall zero thermal expansion (ZTE). ZTE materials are useful because they do not undergo thermal shock on rapid heating or cooling. The need for such composites could be avoided if ZTE materials were available in a pure form. Here we show that an electrically conductive intermetallic compound, YbGaGe, can exhibit nearly ZTE-that is, negligible volume change between 100 and 400 K. We suggest that this response is due to a temperature-induced valence transition in the Yb atoms. ZTE materials are desirable to prevent or reduce resulting strain or internal stresses in systems subject to large temperature fluctuations, such as in space applications and thermomechanical actuators.

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ER -

Zero thermal expansion in YbGaGe due to an electronic valence transition

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