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Features of Formation of Cr<sup>3+</sup> Paramagnetic Centers in Strontium Titanate (SrTiO<inf>3</inf>) Implanted with Chromium Ions

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dc.contributor.author Sukhanov A.A.
dc.contributor.author Yanilkin I.V.
dc.contributor.author Valeev V.F.
dc.contributor.author Nuzhdin V.I.
dc.contributor.author Khaibullin R.I.
dc.contributor.author Tagirov L.R.
dc.contributor.author Voronkova V.K.
dc.date.accessioned 2021-02-25T20:36:33Z
dc.date.available 2021-02-25T20:36:33Z
dc.date.issued 2020
dc.identifier.issn 1027-4510
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/162030
dc.description.abstract © 2020, Pleiades Publishing, Ltd. Abstract: We present results of structural (XPS) and magnetic resonance (EPR) studies of single-crystal plates of strontium titanate (SrTiO3) heavily doped with chromium utilizing ion implantation technique. It was shown that the temperature of the oxide matrix during ion implantation (300 or 900 K) significantly affects the valence state of the implanted chromium impurity (Cr0 or Cr3+) and the depth profiles of its distribution in the SrTiO3 matrix. Using the EPR method, it was established that as a result of implantation of chromium impurity at an elevated substrate temperature during irradiation, the dominating color centers in the surface implanted oxide layer appear in the form of trivalent chromium ions in a cubic environment with a g-factor g = 1.976 and the value of the hyperfine coupling constant with the magnetic nucleus of 53Cr isotope, A = 16.2 × 10–4 cm–1. From a comparison of these data with parameters for the cubic Cr3+ impurity center in the SrTiO3 single crystal, it was concluded that this center is localized in the structural positions of titanium. Upon implantation of a chromium impurity in SrTiO3 at room temperature of the substrate, in addition to cubic Cr3+ centers, new signals were detected in the EPR spectra, apparently associated with the formation of oxygen vacancies in the implanted oxide. However, the number of these additional centers does not change significantly even after high-temperature heat treatment of samples in air at temperatures up to 900 K. It is noted that signals of this type also appear in the spectra of SrTiO3 samples obtained as a result of hot implantation and then subjected to high-temperature thermal annealing.
dc.relation.ispartofseries Journal of Surface Investigation
dc.subject chromium ion
dc.subject electron paramagnetic resonance
dc.subject ion implantation
dc.subject oxygen vacancies
dc.subject strontium titanate
dc.subject thermal annealing
dc.subject XPS
dc.title Features of Formation of Cr<sup>3+</sup> Paramagnetic Centers in Strontium Titanate (SrTiO<inf>3</inf>) Implanted with Chromium Ions
dc.type Article
dc.relation.ispartofseries-issue 3
dc.relation.ispartofseries-volume 14
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 551
dc.source.id SCOPUS10274510-2020-14-3-SID85087500863

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  • Публикации сотрудников КФУ Scopus [22633]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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