Negative Thermal Expansion of Mercurous Halides

Thermal expansions of single crystals of mercurous halides grown by the physical vapor transport method have been investigated. The unit cell lattice parameters were measured by using x-ray diffraction, whereas, the bulk thermal expansion was investigated using the dilatometer instrument as a functi...

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Bibliographic Details
Published in:Journal of electronic materials 2019-11, Vol.48 (11), p.7063-7067
Main Authors: Amarasinghe, Priyanthi M., Kim, Joo-Soo, Trivedi, Sudhir, Qadri, Syed B., Gorzkowski, Edward P., Imler, Greg, Soos, Jolanta, Gupta, Neelam, Jensen, James
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Crystal growth
Electronics and Microelectronics
Extensometers
Halides
Instrumentation
Lattice parameters
Materials Science
Optical and Electronic Materials
Product design
Single crystals
Solid State Physics
Thermal expansion
Unit cell
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Summary:Thermal expansions of single crystals of mercurous halides grown by the physical vapor transport method have been investigated. The unit cell lattice parameters were measured by using x-ray diffraction, whereas, the bulk thermal expansion was investigated using the dilatometer instrument as a function of temperature. It was found by both techniques that mercurous halides exhibit positive linear thermal expansion along the a -axis and negative linear thermal expansion along the c -axis. However, the volume expansion in both methods was found to be positive. The coefficient of thermal expansion along the a -axis was significantly larger than the one along the c -axis giving a net positive volume expansion.
ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-019-07518-7