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Thermal analysis of rare earth gallates and aluminates

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Abstract

Dilatometry, high-temperature x-ray diffraction, differential thermal analysis, and differential scanning calorirmetry have been performed on LaGaO3, NdGaO3, PrGaO3, SmAlO3, and LaAlO3 single crystals grown by the Czochralski technique. First order phase transitions have been located at 145°C for LaGaO3 and 785°C for SmAlO3, and ΔH has been measured for the LaGaO3 transition. Second order transitions have been identified for LaGaO3, PrGaO3, NdGaO3, and LaAlO3. The usefulness of these compounds as substrates for high temperature superconducting films is discussed in terms of thermal expansion matching.

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Authors and Affiliations

  1. AT&T Bell Laboratories, Murray Hill, New Jersey, 07974, USA

    H. M. O’Bryan, P. K. Gallagher, G. W. Berkstresser & C. D. Brandle

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  1. H. M. O’Bryan
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  2. P. K. Gallagher
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  3. G. W. Berkstresser
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  4. C. D. Brandle
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O’Bryan, H.M., Gallagher, P.K., Berkstresser, G.W. et al. Thermal analysis of rare earth gallates and aluminates. Journal of Materials Research 5, 183–189 (1990). https://doi.org/10.1557/JMR.1990.0183

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  • DOI: https://doi.org/10.1557/JMR.1990.0183

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