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Title: Lanthanum aluminate (110) 3 × 1 surface reconstruction

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Journal Article: Publisher's Accepted Manuscript
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Surface Science
Additional Journal Information:
Journal Volume: 633; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-07-03 09:25:07; Journal ID: ISSN 0039-6028
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Kienzle, D., Koirala, P., and Marks, L. D. Lanthanum aluminate (110) 3 × 1 surface reconstruction. Netherlands: N. p., 2015. Web. doi:10.1016/j.susc.2014.11.016.
Kienzle, D., Koirala, P., & Marks, L. D. Lanthanum aluminate (110) 3 × 1 surface reconstruction. Netherlands. doi:10.1016/j.susc.2014.11.016.
Kienzle, D., Koirala, P., and Marks, L. D. 2015. "Lanthanum aluminate (110) 3 × 1 surface reconstruction". Netherlands. doi:10.1016/j.susc.2014.11.016.
title = {Lanthanum aluminate (110) 3 × 1 surface reconstruction},
author = {Kienzle, D. and Koirala, P. and Marks, L. D.},
abstractNote = {},
doi = {10.1016/j.susc.2014.11.016},
journal = {Surface Science},
number = C,
volume = 633,
place = {Netherlands},
year = 2015,
month = 3

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Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.susc.2014.11.016

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Cited by: 4works
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  • In searching for new materials with improved quantum-electronic characteristics the authors studied the interaction of La/sub 2/O/sub 3/ and Al/sub 2/O/sub 3/ on isomorphous replacement of the former with Na/sub 2/O. A study of LaAlO/sub 3/ synthesis with Na/sub 2/O additions showed the latter to accelerate the interaction of La/sub 2/O/sub 3/ with Al/sub 2/O/sub 3/ and form La/sub 1-n/Na/sub n/AlO/sub 3-k/ solid solutions. X-ray photoelectron spectroscopy of LaAlO/sub 3/ and La/sub 1-n/Na/sub n/AlO/sub 3-k/ showed less La on the surfaces of both products and a greater Na concentration of the latter surface.
  • We study the propagation of terahertz bandwidth electrical pulses on high critical current density c-axis oriented YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ (YBCO) coplanar transmission lines deposited epitaxially on the low dielectric loss substrate lanthanum aluminate (LaAlO/sub 3/). The losses on the YBCO transmission line are lower than on an equivalent gold line on the same substrate at temperatures below 50 K. At higher temperatures, absorption and dispersion of the ultrashort electrical pulses are observed in reasonable agreement with Mattis--Bardeen theory.
  • Lanthanum aluminate (LaAlO[sub 3]) has recently become of interest to the superconductor community as a substrate material for growing epitaxial films of YBa[sub 2]Cu[sub 3]O[sub 7] (YBCO). LaAlO[sub 3] has a rhombohedral crystal structure at room temperature and undergoes a transformation to a cubic structure at high temperature. The phase transformation on cooling leads to the formation of twins. This twinning may cause problems in using LaAlO[sub 3] as a substrate. This paper details in-situ observations in the electron microscope of twinning in LaAlO[sub 3] crystals cycled from room temperature to [approximately] 875 C and back.
  • LaAlO[sub 3] was chemically modified in order to ascertain the effects of substitution of larger cations on the compound's slight rhombohedral distortion from cubic symmetry--a property that often degrades the performance of LaAlO[sub 3] substrates for epitaxial high-temperature superconducting films. La[sub 1[minus]x]Sr[sub x]Al[sub 1[minus]x]Ti[sub x]O[sub 3] (x = 0.05, 0.10, 0.15, 0.25), La[sub 1[minus]x]Sr[sub x]Al[sub 1[minus]x]Zr[sub x]O[sub 3], La[sub 1[minus]x]Sr[sub x]Al[sub 1[minus]x]Mg[sub x]O[sub 3[minus]2x]F[sub 2x] and La[sub 1[minus]x]Sr[sub x]Al[sub 1[minus]x]Sc[sub x]O[sub 3[minus]x]F[sub x] (x = 0.05, 0.10, 0.15) were prepared in polycrystalline form and 1--2 mm single crystals of the Sr, Ti- and Sr,Zr-substituted systems were grown using a PbO-PbF[submore » 2]-B[sub 2]O[sub 3]-PbO[sub 2] flux. Shifts in the peak positions of the X-ray powder diffraction patterns confirmed substitution of the larger cations. The diffraction patterns were also typified by line-broadening and a decrease in the rhombohedral splitting at all doping levels. The dielectric constant of LaAlO[sub 3] was unchanged for all of the fluoride-containing systems and for the 5% Sr,Ti- and Sr,Zr-systems.« less
  • As part of an effort to develop a new, non-vacuum-processed substrate for high current superconducting films, thin films of LaAlO{sub 3} and NdAlO{sub 3} were deposited on biaxially textured (100) nickel substrates using a solution deposition technique. On heating to 1150 C in Ar-4% H{sub 2} for 1 h, epitaxial films were obtained. Out-of-plane alignment was confirmed by obtaining rocking curves of the (002) plane of the LaAlO{sub 3} (full width at half-maximum (fwhm) = 7.2{degree}) and the NdAlO{sub 3} (fwhm = 5.8{degree}) films. In-plane alignment was demonstrated by obtaining phi scans of the (110) plane of the LaAlO{sub 3}more » (fwhm = 13.4{degree}) and the NdAlO{sub 3} (fwhm = 8.8{degree}) films. Grain alignment in the films is approximately equivalent to the alignment of the Ni substrate. Analysis of pole figures indicated that in both films there are two-in-plane orientations present, the major being (001)[100] and the minor (001)[110].« less