Mg2TiO4 as a novel substrate for high-temperature superconducting thin films
- 9 November 1992
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 61 (19) , 2359-2361
- https://doi.org/10.1063/1.108243
Abstract
Single‐crystalline Mg2TiO4 layers have been employed as a novel substrate material for superconducting YBa2Cu3O7−δ (YBCO) thin films. The Mg2TiO4 substrate layers have been grown on MgO cleavage faces by a solid‐state reaction between the MgO crystal and TiO2 vapor. The structure and morphology of laser‐deposited YBCO thin films have been studied by x‐ray diffraction, transmission electron microscopy, electron diffraction, and scanning tunneling microscopy. YBCO has been grown on Mg2TiO4(001) with the epitaxial relationship [100](001) YBCO ∥[100](001)Mg2TiO4 and (considering twins)∥[010](001)Mg2TiO4. The film morphology is characterized by growth spirals originating from screw dislocations.Keywords
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