J. Appl. Phys. 126, 045715 (2019); https://doi.org/10.1063/1.5101043 126, 045715 © 2019 Author(s). Optical constants and band gap of wurtzite Al 1−x Sc x N/Al 2 O 3 prepared by magnetron sputter epitaxy for scandium concentrations up to x = 0.41 Cite as: J. Appl. Phys. 126, 045715 (2019); https://doi.org/10.1063/1.5101043 Submitted: 23 April 2019 • Accepted: 07 July 2019 • Published Online: 31 July 2019 Martina Baeumler, Yuan Lu, Nicolas Kurz, et al. ARTICLES YOU MAY BE INTERESTED IN Experimental determination of the electro-acoustic properties of thin film AlScN using surface acoustic wave resonators Journal of Applied Physics 126, 075106 (2019); https://doi.org/10.1063/1.5094611 Elastic modulus and coefficient of thermal expansion of piezoelectric Al 1−x Sc x N (up to x = 0.41) thin films APL Materials 6, 076105 (2018); https://doi.org/10.1063/1.5040190 Tunable optoelectronic and ferroelectric properties in Sc-based III-nitrides Journal of Applied Physics 114, 133510 (2013); https://doi.org/10.1063/1.4824179