Phase Transition Of Znxmn1-Xs Dilute Magnetic Semiconductor Nanoparticles Under Ultra-High Pressure

The high-pressure behavior of different doping content of ZnS nanocrystals has been investigated using angle-dispersive synchrotron X-ray powder diffraction up to 45.1 GPa. A phase transformation from the zinc-blende(ZB) to the rock-salt (RS) structure is observed at pressures of about 17.7 and 18.3 GPa at room temperature, corresponding to the Mn2+ ion mole percent content solutions 0.85 % and 1.26 %, respectively. The obtained results indicate that the Mn2+ doping could obviously enhance the phase transition pressure of ZnS nanocrystal. The elevation of phase transition pressure could origin from the higher surface energy induced by ion doping. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim