The growth of (110) YBaCuO thin films and their characterization by optical methods

Habermeier, H.–U.; Lourenço, A.A.C.S.; Friedl, B.; Kircher, J.; Köhler, Jürgen

doi:10.1016/0038-1098(91)90769-r

Cited by 37 publications

(8 citation statements)

References 14 publications

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“…In this case we have (110) and (103) as possible competing orientations with low film-substrate interface Gibbs energy. Beside being in agreement with the optical crystal characterization by Habermeier et al, 24 this interpretation is confirmed by the needlelike morphology of the pure (103) oriented sample shown by Eom et al 16 As we did not get any pure (103) oriented YBCO film, the crossover from (110) to (103) orientation must lie in the highest range of the explored deposition temperature. 21 ' 24 In this framework, we suggest that long grains, which appear only at high values of T s (Fig.…”

Section: Resultssupporting

confidence: 90%

Morphological and structural properties of high quality YBCO thin films

et al. 1995

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High-quality YBCO thin films have been grown by Inverted Cylindrical Magnetron Sputtering (ICMS) on LaAlO 3 (100), SrTiO 3 (100), SrTiO 3 (110), and MgO(lOO) substrates. Transition temperatures of oaxis films exceed 90 K, and transition widths are within 1 K. Critical currents range up to 5 X 10 6 A/cm 2 at 77 K. Structural and morphological features analyzed by x-ray diffraction and scanning electron microscopy, respectively, are found to be strongly dependent on film orientation and deposition temperature. In order to understand such dependence, a simple interpretation is proposed in terms of Gibbs energies and growth dynamics of the nucleation process.

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Section: Resultssupporting

confidence: 90%

Morphological and structural properties of high quality YBCO thin films

et al. 1995

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“…The latter can be achieved by a preparation process according to a previously developed template technique. 34,35 First, a (110) oriented layer of non-superconducting PrBa 2 Cu 3 O 7-d (PBCO) with a thickness of 50 nm was deposited by PLD on SrTiO 3 (STO) single crystals with (110) orientation at T ¼ 650 C and an oxygen pressure of 40 Pa. This PBCO buffer layer stabilizes the (110) orientation of YBCO layers grown subsequently in the YBCO/LCMO/YBCO trilayer.…”

Section: Methodsmentioning

confidence: 99%

Preparation of a ferromagnetic barrier in YBa2Cu3O7–δ thinner than the coherence length

Soltan

Albrecht

Goering

et al. 2015

Journal of Applied Physics

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Thin ferromagnetic La2∕3Ca1∕3MnO3 layers are deposited in between two layers of the high-Tc superconductor YBa2Cu3O7–δ (YBCO) by pulsed laser deposition. Using a tailored buffer layer allows the change of the orientation of the CuO2 planes inside the superconducting layers. With this technique it is possible to produce ferromagnetic barrier layers with high ferromagnetic transition temperatures that are thinner than the coherence length of the adjacent superconductors. Magnetization and electric transport measurements suggest that this geometry might be successful for the generation of ferromagnetic Josephson junctions in high temperature superconducting YBCO.

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“…Habermeier et al [79] applied the PrBa 2 Cu 3 O 7-x (PBCO) hetero-templating technique, where a PrBa 2 Cu 3 O 7-x template of ~ 60 nm is deposited at a substrate temperature of 660 °C at an oxygen partial pressure of 1mbar followed by the YBCO deposition with continuously increasing the substrate temperature to 720 °C. The films show values for T c between 83 K and 87 K. The corresponding x-ray diffraction pattern revealed almost single phase (110)-oriented films with the dominant diffraction peaks ascribed to the (110) and (220) reflections adjacent to the substrate (110) and (220) peaks.…”

Section: Tailoring Cuprate Thin Film Orientationmentioning

confidence: 99%

“…Upper spectrum: same direction of the laser beam but incident and scattered light polarized perpendicular to the c-direction along a (110) direction lying in the plane. [79]. defect generation, the substrates and films were studied by UHV scanning tunneling microscopy (STM) in situ.…”

Section: Controlled Generation Of Antiphase Boundariesmentioning

confidence: 99%

Science and technology of cuprate-based high temperature superconductor thin films, heterostructures and superlattices—the first 30 years (Review Article)

Habermeier

2016

Low Temperature Physics

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Science and technology of cuprate-based high temperature superconductor thin films, heterostructures and superlattices -the first 30 years (Review Article) H.-U. Habermeier Science Consulting International, Niersteinerstr, 28, Stuttgart D 70499, Germany Max-Planck-Institute for Solid State Research, Heisenbergstr, 1, Stuttgart D 70569, Germany E-mail: huh@fkf.mpg.de Received May 30, 2016, published online August 25, 2016 During the three decades after the discovery of superconductivity at high temperatures in copper oxides, intense research activities generated a tremendous progress in both, mastering the scientific challenges underpinning the understanding of the properties of these chemically and structurally complex materials as well as achieving a mature technology in preparing single phase bulk specimens -including single crystals -and epitaxially grown single crystalline thin films. This review covers in addition to more basic physics oriented developments mainly technological aspects of complex oxide thin film deposition as an enabling technology to explore the physics of these materials. It consists of two parts: after a brief introduction to the materials development prior to the discovery of superconducting copper oxides, a description of the relevant properties of copper oxide superconductors with focus on YBa 2 Cu 3 O 7-δ is given, followed by the coverage of essentials of complex oxide thin film deposition technology with the copper oxides at its core. Here, the major physical vapor deposition technologies (evaporation and oxide molecular beam technology, sputtering and pulsed laser deposition) are described followed by an overview of substrate requirements to deposit high quality thin films. Opportunities by choosing special substrates with unique properties far beyond the usual mechanical support for a film are introduced with examples aside from usual lattice mismatch induced strain effects. One is the continuous modification of the strain state by poling ferroelectric oxide substrates linked to a piezoelectric effect, the other is the nanoscale tailoring of substrate step-and-terrace structures resulting in a controllable generation of planar defects in complex oxides, thus contributing to the physics of flux-line pinning in cuprate superconductors. In the second part of this review, first some highlights of single layer thin film research are given such as to tailor thin film orientation, generating well defined antiphase boundaries in YBa 2 Cu 3 O 7-δ thin films as flux-line pinning centers as well as contributions to understand fluctuation conductivity in relation to the pseudogap state. In the last section new developments in high T c cuprate based heterostructures and superlattices are reviewed with a special focus on the opportunities offered by interface-induced electronic interactions.

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The growth of (110) YBaCuO thin films and their characterization by optical methods

Cited by 37 publications

References 14 publications

Morphological and structural properties of high quality YBCO thin films

Morphological and structural properties of high quality YBCO thin films

Preparation of a ferromagnetic barrier in YBa2Cu3O7–δ thinner than the coherence length

Science and technology of cuprate-based high temperature superconductor thin films, heterostructures and superlattices—the first 30 years (Review Article)

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