Magnetic properties and atomic structure of La2/3Ca1/3MnO3–YBa2Cu3O7 heterointerfaces

Zhang, Zaoli; Kaiser, Ute; Soltan, S.; Habermeier, H.–U.; Keimer, B.

doi:10.1063/1.3274044

Cited by 29 publications

(30 citation statements)

References 23 publications

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“…Since it is known that the Curie temperature is strongly reduced in thin LCMO layers deposited on STO substrates, 40 2-3 u.c. is a remarkable result; the soft LCMO layer in between two YBCO layers has a Curie temperature of T Curie ¼ 265 K which is close to the bulk value of 275 K. This is in agreement with our previous work, 38 where we found that a 7 u.c. thick LCMO layer in between (001)-YBCO layers had a T Curie ¼ 210 K. In all heterostructures used in the present study we find a ferromagnetic ordering temperature of LCMO higher than 200 K (see Table I).…”

Section: Resultssupporting

confidence: 82%

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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Section: Resultssupporting

confidence: 82%

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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“…Various x-ray and neutron techniques have been used to study bilayer/trilayer/superlattice HTSC-manganite heterostructures, such as YBCO/LCMO (La 1−x Ca x MnO 3 ) and YBCO/LSMO. [15][16][17][18][19] These studies reveal (a) a strongly (but not totally) suppressed Mn ferromagnetic moment at the manganite side of the interface, and/or (b) a small ferromagnetic Cu moment developing on the HTSC side of the interface. This is consistent with the observation of a reduced saturation magnetization per manganite layer compared to the bulk value.…”

Section: Introductionmentioning

confidence: 97%

Interfacial effects revealed by ultrafast relaxation dynamics inBiFeO3/YBa2Cu3O7bilayers

Springer

Nair

et al. 2016

Phys. Rev. B

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The temperature dependence of the relaxation dynamics in the bilayer thin film heterostructure composed of multiferroic BiFeO3 (BFO) and superconducting YBa2Cu3O7 (YBCO) grown on (001) SrTiO3 substrate is studied by time-resolved pump-probe technique, and compared with that of pure YBCO thin film grown under the same growth conditions. The superconductivity of YBCO is found to be retained in the heterostructure. We observe a speeding up of the YBCO recombination dynamics in the superconducting state of the heterostructure, and attribute it to the presence of weak ferromagnetism at the BFO/YBCO interface as observed in magnetization data. An extension of the Rothwarf-Taylor model is used to fit the ultrafast dynamics of BFO/YBCO, that models an increased quasiparticle occupation of the ferromagnetic interfacial layer in the superconducting state of YBCO.

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“…Additionally, it could be shown by dedicated analytical TEM investigations that the interfacial stacking patterns are different for the YBCO-LCMO interface (YBCO-BaOCuO 2 -(La,Ca)O-MnO-LCMO and the LCMO-YBCO one (LCMO-(La,Ca)O-MnO-BaO-CuO-BaO-CuO 2 -YBCO) [114]. The consequences of the details of the microstructure on the macroscopic properties of the films are not explores yet, however, they might be of importance for the charge carrier transport across the interfaces The early work on these hybrid structures and superlattices composed of a high temperature superconductor (e.g.…”

Section: Early Experimentsmentioning

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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Magnetic properties and atomic structure of La2/3Ca1/3MnO3–YBa2Cu3O7 heterointerfaces

Cited by 29 publications

References 23 publications

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

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

Interfacial effects revealed by ultrafast relaxation dynamics inBiFeO3/YBa2Cu3O7bilayers

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

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