| Issue |
EPL
Volume 92, Number 6, December 2010
|
|
|---|---|---|
| Article Number | 66001 | |
| Number of page(s) | 4 | |
| Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
| DOI | https://doi.org/10.1209/0295-5075/92/66001 | |
| Published online | 24 January 2011 | |
Compressibility of cubic vanadium mononitride
1
FB Material- und Geowissenschaften, Technische Universität Darmstadt - Petersenstr. 23, 64287 Darmstadt, Germany, EU
2
LPMTM-CNRS, Institut Galilée, Université Paris Nord - 99 av. J. B. Clément, 93430 Villetaneuse, France, EU
3
ESRF - BP 220, 38043 Grenoble Cedex, France, EU
a
dzivenko@materials.tu-darmstadt.de
Received:
11
October
2010
Accepted:
13
December
2010
The equation of state of vanadium mononitride with a cubic rock-salt structure, δ-VN, was measured on quasi-hydrostatic compression in a diamond anvil cell to 29 GPa. From these data the bulk modulus of δ-VN, B0=300(6) GPa, and its first pressure derivative, B′0=3.6(6), were obtained. A comparison of the available data on B0 for δ-TiN, δ-ZrN, δ-HfN and δ-VN, extended by the present result, indicates a systematic agreement between the experimental B0-values from compression measurements and theoretical predictions based on the generalized gradient approximation (GGA) method. An increase of B0 with decreasing zero-pressure specific volume, earlier suggested for the group-4 and -5 transition metal mononitrides, is not confirmed.
PACS: 64.30.-t – Equations of state of specific substances / 62.20.de – Elastic moduli / 62.50.-p – High-pressure effects in solids and liquids
© EPLA, 2010
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