Bibliographic Citation
Document | |
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DOI | 10.2172/334215 |
Title | Pressure induced metallization of the perovskite Sr{sub 3}Fe{sub 2}O{sub 7} |
Creator/Author | Rozenberg, G.K. ; Machavariani, G.Y. ; Pasternak, M.P. ; Milner, A.P. [Tel Aviv Univ. (Israel). School of Physics and Astronomy] ; Hearne, G.R. [Univ. of the Witwatersrand, Johannesburg-Gauteng (South Africa). Dept. of Physics] ; Taylor, R.D. [Los Alamos National Lab., NM (United States)] ; Adler, P. [Max Planck inst. fuer Festkoerperforschung, Stuttgart (Germany)] |
Publication Date | 1998 Dec 31 |
OSTI Identifier | OSTI ID: 334215; Legacy ID: DE99002271 |
Report Number(s) | LA-UR--98-3264; CONF-980890-- |
DOE Contract Number | W-7405-ENG-36 |
Other Number(s) | Other: ON: DE99002271; CNN: Grant BSF 95-00012;Grant GIF I-086.401; TRN: TRN: AHC29914%%19 |
Resource Type | Technical Report |
Resource Relation | Conference: Physica status solid and meeting of high pressure semiconductors, Thessaloniki (Greece), 10-13 Aug 1998; Other Information: PBD: [1998] |
Research Org | Los Alamos National Lab., NM (United States) |
Sponsoring Org | USDOE Office of Energy Research, Washington, DC (United States);United States-Israel Binational Science Foundation, Jerusalem (Israel) |
Subject | 36 MATERIALS SCIENCE; CRYSTAL STRUCTURE; ELECTRIC CONDUCTIVITY; MAGNETIC PROPERTIES; STRONTIUM OXIDES; IRON OXIDES; VERY HIGH PRESSURE; TEMPERATURE DEPENDENCE; SPECTROSCOPY; X-RAY DIFFRACTION; EXPERIMENTAL DATA |
Description/Abstract | Electrical, magnetic and structural properties of the antiferromagnetic semiconductor Sr{sub 3}Fe{sub 2}O{sub 7} (Fe{sup 4+}, d{sup 4}) were probed by resistance, Moessbauer spectroscopy (MS) and X-ray diffraction (XRD) measurements to P {approximately} 40 GPa using diamond-anvil cells. A sluggish pressure-induced insulator-metal transition is observed with a clear incipient metallic state at P {ge} 20 GPa. The Fe(IV) 3d magnetic moments remain unaltered across the transition as deduced from MS, and XRD studies show no structural symmetry change to 40 GPa. The results are consistent with carrier delocalization due to p-p gap closure e.g., ligand-to-ligand charge transfer that does not involve the d-states and structural symmetry changes. |
Country of Publication | United States |
Language | English |
Format | Size: 13 p. |
Availability | OSTI as DE99002271 |
System Entry Date | 2007 May 07 |
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