X-ray absorption fine structure studies of Mn coordination in doped perovskite SrTiO3

The coordination of Mn in doped SrTiO3 ceramics having nominal compositions SrTi0.98Mn0.02O3 and Sr0.98Mn0.02TiO3 was analyzed using x-ray absorption fine structure (XAFS) measurements. As expected, Mn4+ substitution for Ti4+ leads to Mn occupancy of the octahedral B-sites of ABO3 perovskite lattice...

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Veröffentlicht in:	Applied physics letters 2010-02, Vol.96 (5)
Hauptverfasser:	Levin, I., Krayzman, V., Woicik, J. C., Tkach, A., Vilarinho, P. M.
Format:	Artikel
Sprache:	eng
Schlagworte:	ABSORPTION ATOMS CATIONS CERAMICS CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS FINE STRUCTURE national synchrotron light source PEROVSKITE
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creator	Levin, I. Krayzman, V. Woicik, J. C. Tkach, A. Vilarinho, P. M.
description	The coordination of Mn in doped SrTiO3 ceramics having nominal compositions SrTi0.98Mn0.02O3 and Sr0.98Mn0.02TiO3 was analyzed using x-ray absorption fine structure (XAFS) measurements. As expected, Mn4+ substitution for Ti4+ leads to Mn occupancy of the octahedral B-sites of ABO3 perovskite lattice with a Mn–O bond distance of 1.902 Å (compared to 1.953 Å for Ti–O) and no significant local distortions around the Mn atoms. In contrast, for the composition Sr0.98Mn0.02TiO3, Mn segregates to both the A-sites (as Mn2+) and the B-sites (predominantly as Mn4+). Extended XAFS confirms strong (≈0.77 Å) displacements of Mn2+ cations off the ideal A-site positions along ⟨001⟩ directions with a significant distortion of several coordination shells around the dopant atoms.
doi_str_mv	10.1063/1.3298369
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C. ; Tkach, A. ; Vilarinho, P. M.</creator><creatorcontrib>Levin, I. ; Krayzman, V. ; Woicik, J. C. ; Tkach, A. ; Vilarinho, P. M. ; Brookhaven National Laboratory (BNL) National Synchrotron Light Source</creatorcontrib><description>The coordination of Mn in doped SrTiO3 ceramics having nominal compositions SrTi0.98Mn0.02O3 and Sr0.98Mn0.02TiO3 was analyzed using x-ray absorption fine structure (XAFS) measurements. As expected, Mn4+ substitution for Ti4+ leads to Mn occupancy of the octahedral B-sites of ABO3 perovskite lattice with a Mn–O bond distance of 1.902 Å (compared to 1.953 Å for Ti–O) and no significant local distortions around the Mn atoms. In contrast, for the composition Sr0.98Mn0.02TiO3, Mn segregates to both the A-sites (as Mn2+) and the B-sites (predominantly as Mn4+). Extended XAFS confirms strong (≈0.77 Å) displacements of Mn2+ cations off the ideal A-site positions along ⟨001⟩ directions with a significant distortion of several coordination shells around the dopant atoms.</description><identifier>ISSN: 0003-6951</identifier><identifier>EISSN: 1077-3118</identifier><identifier>DOI: 10.1063/1.3298369</identifier><language>eng</language><publisher>United States</publisher><subject>ABSORPTION ; ATOMS ; CATIONS ; CERAMICS ; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; FINE STRUCTURE ; national synchrotron light source ; PEROVSKITE</subject><ispartof>Applied physics letters, 2010-02, Vol.96 (5)</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c322t-c4c0ad74ee73f38d6f848d3e9f83ccec60b00161092c3affce5af9ab25d796e03</citedby><cites>FETCH-LOGICAL-c322t-c4c0ad74ee73f38d6f848d3e9f83ccec60b00161092c3affce5af9ab25d796e03</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27923,27924</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/1019707$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Levin, I.</creatorcontrib><creatorcontrib>Krayzman, V.</creatorcontrib><creatorcontrib>Woicik, J. C.</creatorcontrib><creatorcontrib>Tkach, A.</creatorcontrib><creatorcontrib>Vilarinho, P. M.</creatorcontrib><creatorcontrib>Brookhaven National Laboratory (BNL) National Synchrotron Light Source</creatorcontrib><title>X-ray absorption fine structure studies of Mn coordination in doped perovskite SrTiO3</title><title>Applied physics letters</title><description>The coordination of Mn in doped SrTiO3 ceramics having nominal compositions SrTi0.98Mn0.02O3 and Sr0.98Mn0.02TiO3 was analyzed using x-ray absorption fine structure (XAFS) measurements. As expected, Mn4+ substitution for Ti4+ leads to Mn occupancy of the octahedral B-sites of ABO3 perovskite lattice with a Mn–O bond distance of 1.902 Å (compared to 1.953 Å for Ti–O) and no significant local distortions around the Mn atoms. In contrast, for the composition Sr0.98Mn0.02TiO3, Mn segregates to both the A-sites (as Mn2+) and the B-sites (predominantly as Mn4+). 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M.</creatorcontrib><creatorcontrib>Brookhaven National Laboratory (BNL) National Synchrotron Light Source</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Applied physics letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Levin, I.</au><au>Krayzman, V.</au><au>Woicik, J. C.</au><au>Tkach, A.</au><au>Vilarinho, P. 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In contrast, for the composition Sr0.98Mn0.02TiO3, Mn segregates to both the A-sites (as Mn2+) and the B-sites (predominantly as Mn4+). Extended XAFS confirms strong (≈0.77 Å) displacements of Mn2+ cations off the ideal A-site positions along ⟨001⟩ directions with a significant distortion of several coordination shells around the dopant atoms.</abstract><cop>United States</cop><doi>10.1063/1.3298369</doi></addata></record>
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subjects	ABSORPTION ATOMS CATIONS CERAMICS CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS FINE STRUCTURE national synchrotron light source PEROVSKITE
title	X-ray absorption fine structure studies of Mn coordination in doped perovskite SrTiO3
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