Observation of phase transition and critical behavior in Langmuir films by a ripplon light scattering technique

1996 ◽  
Vol 100 (4) ◽  
pp. 2783-2783
Author(s):  
Naoto Sakamoto ◽  
Keiji Sakai ◽  
Kenshiro Takagi
Keyword(s):  
Phase Transition ◽  
Light Scattering ◽  
Critical Behavior ◽  
Langmuir Films ◽  
Scattering Technique ◽  
Light Scattering Technique

Time-resolved light scattering by photoexcited V2O3

MRS Advances ◽  
2017 ◽  
Vol 2 (23) ◽  
pp. 1231-1236 ◽  
Author(s):  
Nardeep Kumar ◽  
Armando Rúa ◽  
Ramón Díaz ◽  
Iván Castillo ◽  
Brian Ayala ◽  
...  
Keyword(s):  
Phase Transition ◽  
Light Scattering ◽  
Vanadium Oxides ◽  
Transition Dynamics ◽  
Time Resolved ◽  
Size Dependent ◽  
Scattering Technique ◽  
Image Position ◽  
Scattering Signal ◽  
Light Scattering Technique

ABSTRACTUsing ultrafast angle-resolved light scattering technique, we were able to trigger photoinduced phase transition processes in V2O3 film grown on a glass substrate. The phase transition is caused by photoacoustic wave in the film and appears as coherent oscillations of scattering signal at various time scales. These processes strongly depend on the size of microstructures constituting the V2O3 film. One of the key findings of our study is the presence of a size dependent phase transition threshold for V2O3 microstructures, where small size structures ($\tilde <$ 0.5μm) have lowest contribution to the phase transition. The presence of this threshold can be well described by considering uneven internal strain in the films which is one of the key parameters controlling phase transition dynamics in various vanadium oxides.

Sign in / Sign up

Export Citation Format

Share Document