Growth and Investigation of Nd_{1-x}Sm_{x}ScO_3 and Sm_{1-x}Gd_{x}ScO_3 Solid-Solution Single Crystals

• Authors: R. Uecker , D. Klimm , R. Bertram , M. Bernhagen , I. Schulze-Jonack , M. Brützam , A. Kwasniewski , Th. Gesing , D. Schlom
• Languages of publication: EN

Abstracts

EN

The pseudo-cubic lattice parameters of rare-earth (RE) scandate, REScO_3, single crystals grown by the Czochralski technique with RE = Dy to Pr lie between about 3.95 and 4.02 Å. These crystals are the only available perovskite substrates in this lattice constant range that can withstand virtually any thin film growth conditions. Two members of this series, PmScO_3 and EuScO_3, are, however, not suitable for substrate applications. Because the pseudo-cubic lattice parameters between neighbouring REScO_3 compounds decrease with rising atomic number of the RE in about 0.01 Å steps, the unsuitability of PmScO_3 (radioactivity) and EuScO_3 (incompatibility with Si) causes an interruption in this lattice spacing sequence. To replace them, solid solutions of their adjacent rare-earth scandates, i.e., (Nd_{0.5}Sm_{0.5})ScO_3 and (Sm_{0.5}Gd_{0.5})ScO_3, were grown by the Czochralski method. Their average pseudo-cubic lattice parameters of 3.9979 Å and 3.9784 Å are very close to those of PmScO_3 and EuScO_3, respectively, and they show very low segregation. These qualities make these solid solutions excellent substitutes for PmScO_3 and EuScO_3.

Keywords

EN

64.75.Nx; 81.10.Fq; 81.30.-t

Discipline

• 81.30.-t: Phase diagrams and microstructures developed by solidification and solid-solid phase transformations(see also 64.70.K- Solid-solid transitions)
• 81.10.Fq: Growth from melts; zone melting and refining
• 64.75.Nx: Phase separation and segregation in solid solutions

• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 124
• Issue: 2
• Pages: 295-300

Dates

published

2013-08

Contributors

author

R. Uecker

• Leibniz Institute for Crystal Growth, Max-Born-Str. 2, D-12489 Berlin, Germany

author

D. Klimm

• Leibniz Institute for Crystal Growth, Max-Born-Str. 2, D-12489 Berlin, Germany

author

R. Bertram

• Leibniz Institute for Crystal Growth, Max-Born-Str. 2, D-12489 Berlin, Germany

author

M. Bernhagen

• Leibniz Institute for Crystal Growth, Max-Born-Str. 2, D-12489 Berlin, Germany

author

I. Schulze-Jonack

• Leibniz Institute for Crystal Growth, Max-Born-Str. 2, D-12489 Berlin, Germany

author

M. Brützam

• Leibniz Institute for Crystal Growth, Max-Born-Str. 2, D-12489 Berlin, Germany

author

A. Kwasniewski

• Leibniz Institute for Crystal Growth, Max-Born-Str. 2, D-12489 Berlin, Germany

author

Th. Gesing

• Solid State Chemical Crystallography, Institute for Inorganic Chemistry, University Bremen Leobener Str./NW2, D-28359 Bremen, Germany

author

D. Schlom

• Department of Materials Science and Engineering, 230 Bard Hall, Cornell University, Ithaca New York 14853-1501, USA
• Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York, 14853, USA

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Identifiers

DOI

10.12693/APhysPolA.124.295