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Synchrotron Moessbauer Spectroscopy and Resistivity Studies of Iron Oxide Under High Pressure

Published online by Cambridge University Press:  26 February 2011

Viktor V. Struzhkin ,
Mikhail I. Eremets ,
Ivan M. Eremets ,
Jung-Fu Lin ,
Wolfgang Sturhahn ,
Jiyong Zhao  and
Michael Y Hu
Viktor V. Struzhkin
Affiliation:
[email protected], Carnegie Institution of Washington, Geophysical Laboratory, 5251 Broad Branch Rd. N.W., Washington, DC, 20015, United States, 202 478 8952, 202 478 8901
Mikhail I. Eremets
Affiliation:
[email protected], Max Planck Institut für Chemie, Mainz, 55020, Germany
Ivan M. Eremets
Affiliation:
[email protected], Carnegie Institution of Washington, Washington, DC, 20015, United States
Jung-Fu Lin
Affiliation:
[email protected], Lawrence Livermore National Laboratory, Livermore, CA, 94550, United States
Wolfgang Sturhahn
Affiliation:
[email protected], Argonne National laboratory, Advanced Photon Source, Argonne, IL, 60439, United States
Jiyong Zhao
Affiliation:
[email protected], Argonne National laboratory, Advanced Photon Source, Argonne, IL, 60439, United States
Michael Y Hu
Affiliation:
[email protected], Argonne National Laboratory, HPCAT, Advanced Photon Source, Argonne, IL, 60439, United States
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Abstract

The strong electron correlations play a crucial role in the formation of a variety of electronic and magnetic properties of the transition metal oxides. In strongly correlated electronic materials many theoretical predictions exist on pressure-induced insulator-metal transitions, which are followed by a collapse of localized magnetic moments and by structural phase transitions [1]. The high-pressure studies provide additional degree of freedom to control the structural, electronic, optical, and magnetic properties of transition metal oxides. With the development of the high-pressure diamond-anvil-cell technique the experimental studies of such transitions are now possible with the advanced synchrotron techniques. In our studies, the iron monooxide Fe0.94O was studied under high pressures up to 200 GPa in diamond anvil cells. The single crystals enriched with Fe57 isotopes have been prepared for nuclear resonance measurements. The results of synchrotron Mössbauer spectroscopy (nuclear forward scattering -NFS), and electro-resistivity measurements suggest a complicated scenario of magnetic interactions governed by band-broadening effects.

Keywords

Mössbauer effectmetal-insulator transitionelectronic structure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 987: Symposium PP – Materials Research at High Pressure , 2006 , 0987-PP05-04
Copyright
Copyright © Materials Research Society 2007

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