Growth and domain structure of YBa2Cu3Ox thin films and YBa2Cu3Ox/CeO2 heterostructures on tilted NdGaO3 substrates

Bdikin, Igor; Mozhaev, P.B.; Ovsyannikov, G. A.; Komissinski, P.V.; Kotelyanskiǐ, I. M.

doi:10.1016/s0921-4534(01)01106-6

Cited by 18 publications

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“…Films grown on substrates with a tilt angle of close to 10 have better grain alignment and improved current-carrying ability [5,6]. There has been considerable interest in such films due to their potential application in Josephsonjunction design [7][8][9], in particular for highly sensitive detectors of electromagnetic radiation.The growth of YBCO films on tilted substrates is also known to produce planar defects, which become channels for easy vortex motion [5,6,10]. These channels are separated by 5-10 m and run parallel to the terrace structure, causing considerable anisotropy in both the flux penetration and the effective critical current.…”

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Quasi-One-Dimensional Intermittent Flux Behavior in Superconducting Films

et al. 2012

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Intermittent filamentary dynamics of the vortex matter in superconductors is found in films of YBa 2 Cu 3 O 7-deposited on tilted substrates. Deposition of this material on such substrates creates parallel channels of easy flux penetration when a magnetic field is applied perpendicular to the film. As the applied field is gradually increased, magneto-optical imaging reveals that flux penetrates via numerous quasi-one-dimensional jumps. The distribution of flux avalanche sizes follows a power law, and data collapse is obtained by finite-size scaling, with the depth of the flux front used as crossover length. The intermittent behavior shows no threshold value in the applied field, in contrast to conventional flux jumping. The results strongly suggest that the quasi-one-dimensional flux jumps are of a different nature than the thermomagnetic dendritic (branching) avalanches that are commonly found in superconducting films. Since the prediction of a regular vortex lattice in type-II superconductors [1], a wide variety of vortex systems has been thoroughly investigated [2,3]. The pronounced dependencies of the range and strength of the vortex-vortex interaction on temperature and magnetic field make the vortex matter a unique, tunable model system for probing the statistical properties of interacting systems. The behavior of the vortex matter is to a large extent also determined by its interaction with quenched disorder in the material, i.e., with microscopic defects that pin the vortices and therefore serve as pinning centers in the superconductor. The interplay between the pinning forces and the driving Lorentz force leads to formation of a metastable critical state [4], where the current density has a critical magnitude, j c , which corresponds to the maximal nondissipative current density.In films of YBa 2 Cu 3 O 7-(YBCO) grown epitaxially, i.e., with proper matching of crystal lattice parameters, on a substrate slightly tilted from a major crystal plane (vicinal films), self-organized arrays of planar defects (antiphase boundaries) are formed with a typical period of 2-5 nm [5]. The terrace structure of the surface is characterized by steps that are a few Å ngströms in height, and the steps provide well-oriented seeding sites for growth along the main axis (c axis) of the overlying YBCO film. Films grown on substrates with a tilt angle of close to 10 have better grain alignment and improved current-carrying ability [5,6]. There has been considerable interest in such films due to their potential application in Josephsonjunction design [7][8][9], in particular for highly sensitive detectors of electromagnetic radiation.The growth of YBCO films on tilted substrates is also known to produce planar defects, which become channels for easy vortex motion [5,6,10]. These channels are separated by 5-10 m and run parallel to the terrace structure, causing considerable anisotropy in both the flux penetration and the effective critical current. At low temperatures, where the anisotropy is most pronounced, the vortices are es...

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Quasi-One-Dimensional Intermittent Flux Behavior in Superconducting Films

et al. 2012

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“…The rocking curve in a wide angular range technique allows rapid determination of mutual orientation of the crystallographic planes of the thin film, substrate surface plane and substrate crystallographic planes [2] …”

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“…The possibility to prepare biepitaxial thin films and structures for other tilt angles was demonstrated in [2], while Kim et al [3] fabricated Josephson junctions for a tilt angle of 30º using miscut SrTiO 3 substrate.…”

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confidence: 99%

Bi-epitaxial YBa₂Cu₃O_x Thin Films on Tilted-axes NdGaO₃ Substrates with CeO₂ Seeding Layer

Mozhaev

Mozhaeva

Jacobsen

et al. 2006

J. Phys.: Conf. Ser.

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“…As a result of suppression of YBCO film orientation with an axis [0 0 1] Y close to the substrate surface, different number of YBCO domain systems (one, two or three) are formed, depending on the CeO 2 orientation. The morphology of such films, investigated with the AFM, showed pyramidal, edge or needle structures, formation of which was probably being caused by different number of domain systems in the film [11].…”

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Twinning and domain structure of epitaxial YBa2Cu3Ox films studies by X-ray diffraction methods

Bdikin

Mozhaev

Mozhaeva

et al. 2005

Journal of Crystal Growth

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Growth and domain structure of YBa2Cu3Ox thin films and YBa2Cu3Ox/CeO2 heterostructures on tilted NdGaO3 substrates

Cited by 18 publications

References 19 publications

Quasi-One-Dimensional Intermittent Flux Behavior in Superconducting Films

Quasi-One-Dimensional Intermittent Flux Behavior in Superconducting Films

Bi-epitaxial YBa₂Cu₃O_x Thin Films on Tilted-axes NdGaO₃ Substrates with CeO₂ Seeding Layer

Twinning and domain structure of epitaxial YBa2Cu3Ox films studies by X-ray diffraction methods

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Growth and domain structure of YBa2Cu3Ox thin films and YBa2Cu3Ox/CeO2 heterostructures on tilted NdGaO3 substrates

Cited by 18 publications

References 19 publications

Quasi-One-Dimensional Intermittent Flux Behavior in Superconducting Films

Quasi-One-Dimensional Intermittent Flux Behavior in Superconducting Films

Bi-epitaxial YBa2Cu3Ox Thin Films on Tilted-axes NdGaO3 Substrates with CeO2 Seeding Layer

Twinning and domain structure of epitaxial YBa2Cu3Ox films studies by X-ray diffraction methods

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Bi-epitaxial YBa₂Cu₃O_x Thin Films on Tilted-axes NdGaO₃ Substrates with CeO₂ Seeding Layer