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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 Date1998 Dec 31
OSTI IdentifierOSTI ID: 334215; Legacy ID: DE99002271
Report Number(s)LA-UR--98-3264; CONF-980890--
DOE Contract NumberW-7405-ENG-36
Other Number(s)Other: ON: DE99002271; CNN: Grant BSF 95-00012;Grant GIF I-086.401; TRN: TRN: AHC29914%%19
Resource TypeTechnical Report
Resource RelationConference: Physica status solid and meeting of high pressure semiconductors, Thessaloniki (Greece), 10-13 Aug 1998; Other Information: PBD: [1998]
Research OrgLos Alamos National Lab., NM (United States)
Sponsoring OrgUSDOE Office of Energy Research, Washington, DC (United States);United States-Israel Binational Science Foundation, Jerusalem (Israel)
Subject36 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 PublicationUnited States
LanguageEnglish
FormatSize: 13 p.
AvailabilityOSTI as DE99002271
System Entry Date2007 May 07

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