High pressure Raman spectroscopy of spinel-type ferrite ZnFe2O4

High pressure Raman spectroscopy of spinel-type ferrite ZnFe2O4

An in-situ Raman spectroscopic study was conducted to explore the pressure induced phase transformation of spinel-type ferrite ZnFe2O4. Results indicate that ferrite ZnFe2O4 initially transforms to an orthorhombic structure phase (CaFe2O4polymorph) at a pressure of 24.6 GPa. Such a phase transformation is complete at 34.2 GPa, and continuously remains stable to the peak pressure of 61.9 GPa. Th...

High-pressure Raman spectroscopy of graphene

John E. Proctor,1,* Eugene Gregoryanz,1 Konstantin S. Novoselov,2 Mustafa Lotya,3 Jonathan N. Coleman,3 and Matthew P. Halsall4 1School of Physics and Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom 2School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom 3School of Physics, Trinity College D...

Crystalization in Spinel Ferrite Nanoparticles

The enhanced interest of the researchers in nanoobjects is due to the discovery of unusual physical and chemical properties of these objects, which is related to manifestation of so-called ‘quantum size effects‘. These arise in the case where the size of the system is commensurable with the de-Brogli wavelengths of the electrons, phonons or excitons propagating in them.A key reason for the chan...

High Performance Method for Skin Roughness Detection Using Raman Spectroscopy

High-pressure Raman spectroscopy of phase change materials