Critical behavior of hydrogen in Nb/Ta superlattices

An in situ X-ray scattering study showing the existence of the lattice-gas- lattice-liquid phase transition for H dissolved in Nb /Ta superlattices is presented, where it is found that critical fluctuations with wavelengths shorter than the superlattice periodicity are suppressed. Since fluctuations...

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Bibliographic Details
Published in:	Physical review letters Vol. 59; no. 11; pp. 1224 - 1227
Main Authors:	MICELI, P. F, ZABEL, H
Format:	Journal Article
Language:	English
Published:	Ridge, NY American Physical Society 14-09-1987
Subjects:	Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science; rheology Defects and impurities in crystals; microstructure Exact sciences and technology Impurities: concentration, distribution, and gradients Materials science Metals, semimetals and alloys Physics Specific materials Structure of solids and liquids; crystallography Critical phenomenon Phase transformation X ray scattering Hydrogen Superlattice
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Summary:	An in situ X-ray scattering study showing the existence of the lattice-gas- lattice-liquid phase transition for H dissolved in Nb /Ta superlattices is presented, where it is found that critical fluctuations with wavelengths shorter than the superlattice periodicity are suppressed. Since fluctuations of only long wavelengths develop, phase separation into gas and liquid phases cannot occur. These results demonstrate that the coherent phase transition is sensitive to the microscopic properties of the H-H interaction. (Author)
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.59.1224