Synchrotron Topographic Studies of Domain Structure in Czochralski Grown PrxLa1-xAlO3 and PrxLa1-x-yMgyAlO3 Crystals |
| K. Wieteska a, W. Wierzchowski b, A. Malinowska b, S. Turczyński b, M. Lefeld-Sosnowska c, D.A. Pawlak b, T. Łukasiewicz b and C. Paulmann d
aNational Centre for Nuclear Research, A. Sołtana 7, Otwock-Świerk 05-400, Poland bInstitute of Electronic Materials Technology, Wólczyńska 133, Warszawa 01-919, Poland cWarsaw University, Institute of Experimental Physics, Hoża 69, Warszawa 00-681, Poland dHASYLAB at DESY, Notkestrasse 85, D-22607 Hamburg, Germany |
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| A domain structure and crystallographic defects in Czochralski grown single crystals of PrxLa1-xAlO3 and PrxLa1-x-yMgyAlO3 were characterised with a number of methods including conventional and synchrotron X-ray diffraction topography, and polariscopic micrography. The observed twin domain systems were located perpendicularly to 〈100〉pcub and 〈110〉pcub (pseudocubic) directions. It has been confirmed that the domains are of the same orientation and a twin character as those described in literature for LaAlO3 and LaGaO3 crystals. The use of section transmission topography enabled to indicate that the domains are perpendicular to the (100)pcub surface of the samples. The misorientation of lattice in the domains was evaluated from the white beam topographs and a tendency of its increase with increasing concentration of praseodymium was revealed. |
| DOI: 10.12693/APhysPolA.121.910 PACS numbers: 81.05.-t, 81.10.Dn, 61.72.Ff |