{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,17]],"date-time":"2026-02-17T15:16:25Z","timestamp":1771341385739,"version":"3.50.1"},"reference-count":10,"publisher":"AIP Publishing","issue":"5","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2011,1,31]]},"abstract":"<jats:p>The effect of Sr vacancies on the behavior of strontium titanate with trivalent dopants (La3+, Gd3+, and Y3+) substituting Sr2+ ions is reported. A remarkable shift of the antiferrodistortive transition temperature Ta is revealed by Raman spectroscopy for just a small content of dopant. It is shown that a unique linear dependence of Ta versus tolerance factor is obtained when Sr-vacancies are taken into account. A vacancy size value of \u223c1.54\u2002\u00c5 is estimated, which is \u223c7% larger than Sr2+ radius. This size difference enables explaining the unexpected increase of lattice parameter with increasing Bi3+ content in Sr1\u22121.5xBixTiO3.<\/jats:p>","DOI":"10.1063\/1.3549181","type":"journal-article","created":{"date-parts":[[2011,2,2]],"date-time":"2011-02-02T23:24:56Z","timestamp":1296689096000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":29,"title":["Enhancement of tetragonality and role of strontium vacancies in heterovalent doped SrTiO3"],"prefix":"10.1063","volume":"98","author":[{"given":"A.","family":"Tkach","sequence":"first","affiliation":[{"name":"University of Porto 1 Department of Physics and Astronomy, IFIMUP and IN Institute of Nanoscience and Nanotechnology, Faculty of Science, , Rua do Campo Alegre 687, 4169-007 Porto, Portugal"}]},{"given":"A.","family":"Almeida","sequence":"additional","affiliation":[{"name":"University of Porto 1 Department of Physics and Astronomy, IFIMUP and IN Institute of Nanoscience and Nanotechnology, Faculty of Science, , Rua do Campo Alegre 687, 4169-007 Porto, Portugal"}]},{"given":"J. Agostinho","family":"Moreira","sequence":"additional","affiliation":[{"name":"University of Porto 1 Department of Physics and Astronomy, IFIMUP and IN Institute of Nanoscience and Nanotechnology, Faculty of Science, , Rua do Campo Alegre 687, 4169-007 Porto, Portugal"}]},{"given":"T. M.","family":"Correia","sequence":"additional","affiliation":[{"name":"University of Porto 1 Department of Physics and Astronomy, IFIMUP and IN Institute of Nanoscience and Nanotechnology, Faculty of Science, , Rua do Campo Alegre 687, 4169-007 Porto, Portugal"}]},{"given":"M. R.","family":"Chaves","sequence":"additional","affiliation":[{"name":"University of Porto 1 Department of Physics and Astronomy, IFIMUP and IN Institute of Nanoscience and Nanotechnology, Faculty of Science, , Rua do Campo Alegre 687, 4169-007 Porto, Portugal"}]},{"given":"O.","family":"Okhay","sequence":"additional","affiliation":[{"name":"University of Aveiro 2 Department of Ceramics and Glass Engineering, CICECO, , 3810-193 Aveiro, Portugal"}]},{"given":"P. M.","family":"Vilarinho","sequence":"additional","affiliation":[{"name":"University of Aveiro 2 Department of Ceramics and Glass Engineering, CICECO, , 3810-193 Aveiro, Portugal"}]},{"given":"I.","family":"Gregora","sequence":"additional","affiliation":[{"name":"Academy of Sciences of the Czech Republic 3 Institute of Physics, , Na Slovance 2, 18221 Prague 8, Czech Republic"}]},{"given":"J.","family":"Petzelt","sequence":"additional","affiliation":[{"name":"Academy of Sciences of the Czech Republic 3 Institute of Physics, , Na Slovance 2, 18221 Prague 8, Czech Republic"}]}],"member":"317","published-online":{"date-parts":[[2011,2,1]]},"reference":[{"key":"2023080200065340600_c1","doi-asserted-by":"publisher","first-page":"1354","DOI":"10.1103\/PhysRev.124.1354","volume":"124","year":"1961","journal-title":"Phys. Rev."},{"key":"2023080200065340600_c2","doi-asserted-by":"publisher","first-page":"858","DOI":"10.1103\/PhysRev.177.858","volume":"177","year":"1969","journal-title":"Phys. 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