Jump to main content
Jump to site search

Issue 17, 2015
Previous Article Next Article

Influence of oxygen partial pressure on SrTiO3 bulk crystal growth from non-stoichiometric melts

Author affiliations

Abstract

Cylindrical SrTiO3 single crystals with diameters and lengths exceeding one inch were grown from non-stoichiometric melts below 1800 °C using the high temperature top-seeded solution growth (TSSG) method. Despite the large crystal diameter the quality has been improved compared to Verneuil grown crystals. Typical etch pit density (EPD) values are in the range between 2 × 104 and 2 × 105 cm−2 for bulk crystals pulled in the <100> direction and using seeds with EPD values of 5 × 105 cm−2. So far pulling SrTiO3 crystals from the melt suffers from growth instabilities like foot formation and subsequent spiraling. To avoid them an effective heat transport via the crystal is indispensable. Especially at elevated temperatures it requires a high optical transparency in the infrared region. In this paper we report the correlation between oxygen partial pressure, composition, IR-transmittance and coloration of the crystals. The growth at a sufficiently high oxygen partial pressure leads to an increase in the optical transparency of the crystals and can thereby suppress foot or spiral formation.

Graphical abstract: Influence of oxygen partial pressure on SrTiO3 bulk crystal growth from non-stoichiometric melts

  • This article is part of the themed collection: HOT articles
Back to tab navigation

Publication details

The article was received on 15 Jan 2015, accepted on 18 Feb 2015 and first published on 06 Mar 2015


Article type: Paper
DOI: 10.1039/C5CE00095E
CrystEngComm, 2015,17, 3224-3234

  •   Request permissions

    Influence of oxygen partial pressure on SrTiO3 bulk crystal growth from non-stoichiometric melts

    C. Guguschev, D. J. Kok, Z. Galazka, D. Klimm, R. Uecker, R. Bertram, M. Naumann, U. Juda, A. Kwasniewski and M. Bickermann, CrystEngComm, 2015, 17, 3224
    DOI: 10.1039/C5CE00095E

Search articles by author

Spotlight

Advertisements