| Autor: |
Zhuravlev, K. K., Hlaing Oo, W. M., McCluskey, M. D., Huso, J., Morrison, J. L., Bergman, L. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; Jul2009, Vol. 106 Issue 1, p13511-13515, 4p, 7 Graphs |
| Abstrakt: |
MgxZn1-xO (x=0.15) and ZnO nanocrystals of about 40 nm in diameter were studied using x-ray diffraction and diamond-anvil cells. The equation of state (EOS) for MgZnO is reported for the first time. Between pressures of 9.45 and 10.7 GPa, MgZnO transforms into the rocksalt (NaCl) structure, which persisted to 1.1 GPa upon decompression. The EOS parameters for ZnO are close to their bulk values and in good agreement with values obtained previously. The bulk modulus for MgZnO was slightly lower than that of ZnO. The pressure-induced decrease in c/a ratio was greater for MgZnO, consistent with the tendency for MgZnO to move toward a cubic structure. From previous photoluminescence measurements [J. Huso et al., Appl. Phys. Lett. 89, 171909 (2006)], the band-gap volume deformation potentials for ZnO and Mg0.15Zn0.85O were determined to be -3.6 and -4.0 eV, respectively. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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