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Browse Journals & Magazines > Journal of Applied Physics ...> Volume:97 Issue:10 Help

Magnetite: Raman study of the high-pressure and low-temperature effects

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9 Author(s)
Gasparov, L.V. ; Department of Chemistry and Physics, University of North Florida, St. John’s Bluff Rd. South, Jacksonville, Florida 32224 ; Arenas, D. ; Choi, K.-Y. ; Guntherodt, G.
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We report the results of a low-temperature (300 K–15 K) high-pressure (up to 22 GPa) Raman study of the Verwey transition in magnetite (Fe3O4). We use additional Raman modes observed below the Verwey transition to determine how the transition temperature changes with the quasihydrostatic pressure. Increase of the pressure results in the linear decrease of the Verwey transition temperature, with no discontinuity. The corresponding pressure coefficient dTV/dP is found to be -5.16±1.19 K/GPa. Such a decrease is substantially larger than the one predicted by the mean-field Coulomb interaction model of the transition.

Published in:
Journal of Applied Physics  (Volume:97 ,  Issue: 10 )

Date of Publication: May 2005

Page(s):
10A922 - 10A922-3
ISSN :
0021-8979
Digital Object Identifier :
10.1063/1.1854476
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
May 2005

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