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High pressure Raman spectroscopy of spinel-type ferrite ZnFe2O4 |
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| Authors: | Zhongwu Wang David Schiferl HStC O'Neill |
| Institution: | a Los Alamos National Laboratory, Los Alamos, NM 87545 USA b Center for Study of Matter at Extreme Conditions (CeSMEC), Florida International University, VH-150, University Park, Miami, FL 33199 USA c Research School of Earth Sciences, Australian National University, Canberra, 2000, Australia |
| Abstract: | 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 (CaFe2O4-polymorph) 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. The coexistence of the two phases over a wide range of pressure implies a sluggish mechanism upon the spinel-to-orthorhombic phase transition. Upon release of pressure, the high pressure ZnFe2O4 polymorph is quenchable at ambient conditions. |
| Keywords: | C High-pressure C Raman Spectroscopy D Phase transitions |
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