https://doi.org/10.1140/epjd/e2005-00272-8
Effect of electron flux on electronic-excitation-induced phase separation in GaSb nanoparticles
1
Department of Mechanical Engineering, Kobe University, Rokkodai, Nada,
Kobe 657-8501, Japan
2
Research Center for Ultra-High Voltage Electron Microscopy, Osaka
University, Yamadaoka, Suita, Osaka 565-0871, Japan
Corresponding author: a yasuda@mech.kobe-u.ac.jp
Received:
26
April
2005
Revised:
4
July
2005
Published online:
11
October
2005
We studied the effect of electron flux on phase separation induced by electronic excitation in GaSb nanoparticles, in order to see whether the phase separation is characterized as a cooperative phenomenon, in which a nonlinear relation may be found between density of excited states introduced and the efficiency of the phase separation or not. The phase separation to two phases consisting of an antimony core and a gallium shell proceeds abruptly after incubation time with increasing electron dose and does only at the flux above a threshold value. It is suggested that such nonlinear behaviors take place as a cooperative phenomenon among electronic-excitation effect, nano-size effect and temperature.
PACS: 61.80.-x – Physical radiation effects, radiation damage / 81.30.-t – Phase diagrams and microstructures developed by solidification and solid-solid phase transformations / 64.75.+g – Solubility, segregation, and mixing; phase separation
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005
