Negative thermal expansion in ZnF2

Negative thermal expansion in ZnF2

We have investigated temperature dependence of the lattice parameters and the unit cell volume of ZnF2 by neutron diffraction and have discovered negative thermal expansion (NTE) at low temperature. To understand why this simple compound exhibits NTE we performed first principle calculations. These...

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Veröffentlicht in:Applied physics letters 2011-05, Vol.98 (18)
Hauptverfasser: Chatterji, Tapan, Zbiri, Mohamed, Hansen, Thomas C.
Format: Artikel
Sprache:eng
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Zusammenfassung:We have investigated temperature dependence of the lattice parameters and the unit cell volume of ZnF2 by neutron diffraction and have discovered negative thermal expansion (NTE) at low temperature. To understand why this simple compound exhibits NTE we performed first principle calculations. These calculations reproduce qualitatively the experimental temperature dependence of volume.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3588414