Author： Kobayashi Kazuaki Arai Masao
Publisher： Taylor & Francis Ltd
ISSN： 0892-7022
Source： Molecular Simulation, Vol.30, Iss.13-15, 2004-11, pp. : 981-986
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Abstract
We study hexagonal materials of MgB ( h -BN) and related compounds under various compression conditions. We found the anomalous behavior of lattice constants a ( b ) for MgB ( h -BN) and HBC. Lattice constants a of MgB ( h -BN) and HBC contract under c -axis compression. This means that the Poisson ratio is negative. The lattice contraction of a -axis is 0.0017 nm for MgB ( h -BN) when P z =50 GPa, 0.0002 nm for HBC when P z =20 GPa. The contraction of HBC is quite small.
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