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K Takeda - One of the best experts on this subject based on the ideXlab platform.
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growth structure of yttria stabilized zirconia films during off normal ion beam Assisted Deposition
Journal of Materials Research, 1998Co-Authors: Yasuhiro Iijima, Mariko Hosaka, Nobuo Tanabe, Nobuyuki Sadakata, Takashi Saitoh, Osamu Kohno, K TakedaAbstract:Biaxially aligned YSZ thin films with strong [100] fiber texture were formed on a polycrystalline Ni-based alloy by off-normal ion-beam-Assisted Deposition. Growth structures were characterized by x-ray diffraction (XRD), transmission electron microscopy (TEM), atomic force microscopy (AFM), etc., and the alignment mechanism was discussed using a selective growth model. Peculiar structural evolution of the crystalline orientation was observed and its development was well described by an exponential equation. It was explained as a collaboration of an anisotropic growth condition and epitaxial crystallization. The [100] fiber texture was formed by columnar structures of diameter of 30–100 nm, which were composed of 5–10 nm diameter crystallites. Very smooth surfaces were observed by AFM imaging with a roughness of 2–3 nm and a peculiar ripple structure. The origin of the azimuthal alignment was discussed with emphasis on the surface structure of YSZ films produced using ion-beam-Assisted Deposition (IBAD) and the etching rate measurements of (100) surfaces of YSZ single crystals.
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biaxial alignment control of yba 2 cu 3 o 7 x films on random ni based alloy with textured yttrium stabilized zirconia films formed by ion beam Assisted Deposition
Journal of Materials Research, 1997Co-Authors: Yasuhiro Iijima, Mariko Hosaka, Nobuo Tanabe, Nobuyuki Sadakata, Takashi Saitoh, Osamu Kohno, K TakedaAbstract:Biaxially aligned YBa 2 Cu 3 O 7− x (YBCO) films were fabricated on random Ni-based alloy tapes with yttrium stabilized-zirconia (YSZ) buffer layers deposited by ion-beam-Assisted Deposition (IBAD). Ar + ion bombardment was found to have two significant effects on the crystalline structure of the YSZ buffer layers: to align a [100] axis with the substrate normal and a [111] axis with the bombarding beam axis. The resulting YSZ films were biaxially aligned on the random polycrystalline tapes, and the azimuthal distribution of the a - and b -axes of YBCO films on the top of the YSZ films was restricted to 10° FWHM. A critical current density ( J c ) of 1.13 × 10 6 A/cm 2 (77 K, 0 T) was obtained, and 1.1 × 10 5 A/cm 2 was maintained at 5 T (77 K, B⊥c). The existence of both intrinsic and extrinsic pinning properties was clearly observed in the angular dependence of J c with B⊥I. The longitudinal field effect on J c was clearly observed, which indicated straight transport currents. This is evidence for strongly coupled current paths that demonstrate the bulk pinning properties of YBCO.
Yasuhiro Iijima - One of the best experts on this subject based on the ideXlab platform.
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development of long y 123 coated conductors by ion beam Assisted Deposition and the pulsed laser Deposition method
Superconductor Science and Technology, 2004Co-Authors: Yasuhiro Iijima, K Kakimoto, Y. Sutoh, S. Ajimura, Takashi SaitohAbstract:100 m class Y-123 coated conductors were produced by using reel-to-reel vacuum ion-beam-Assisted-Deposition (IBAD) and pulsed-laser-Deposition (PLD) apparatuses. 100 m long IBAD-Gd2Zr2O7 template films were uniformly and routinely obtained on non-textured Ni-alloy tapes, with FWHM of Δ below 10°. Y-123 films with FWHM of Δ below 7° were formed on them by PLD. End-to-end Ic of 38 A and Jc of 0.76 MA cm−2 (77 K, self-field) were obtained in a 100 m long sample. For further texture improvement, secondary buffer layers of CeO2 and Gd2Zr2O7 grown by PLD on IBAD-Gd2Zr2O7 template films were studied. Δ of 3° and Jc of 2.9 MA cm−2 were obtained in a 0.1 m long Y-123 film and Jc improved to 1.6 MA cm−2 for an 80 m long Y-123 tape by using the CeO2 buffer layers.
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tem observations of gd2zr2o7 films formed by the ion beam Assisted Deposition method on an ni based alloy
Physica C-superconductivity and Its Applications, 2003Co-Authors: Takeharu Kato, Yasuhiro Iijima, Takashi Saitoh, T Muroga, Tsukasa Hirayama, I Hirabayashi, Y Yamada, T Izumi, Y Shiohara, Yuichi IkuharaAbstract:Abstract Gd 2 Zr 2 O 7 films were formed by the ion-beam-Assisted Deposition (IBAD) method on an Ni-based alloy. Cross-sectional and plan-view specimens of the films were prepared for transmission electron microscopy investigation and microstructural characterization. The thicknesses of the Gd 2 Zr 2 O 7 films were less than 1.3 μm. During initial formation of the films, tiny grains nucleated close to the Ni-based alloy, followed by gradual formation of a columnar texture composed of fine 〈0 0 1〉 aligned grains perpendicular to the Ni-based alloy interface. However, dark-field image taken under g → =(4 4 0) indicated that the in-plane mosaic spread of the columnar texture did not improve as much as the [0 0 1] tilt angle. However, examination of the Gd 2 Zr 2 O 7 film surfaces revealed that the interfaces between columns were not well defined. Furthermore, a CeO 2 film deposited on a 1.3 μm thick Gd 2 Zr 2 O 7 film by the pulsed laser Deposition (PLD) method contained less in-plane mosaic spread than the Gd 2 Zr 2 O 7 film alone. PLD-CeO 2 /IBAD-Gd 2 Zr 2 O 7 films are therefore considered promising candidates for use as buffer layers in superconductor tapes.
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development of y 123 coated conductors by ion beam Assisted Deposition
Physica C-superconductivity and Its Applications, 2002Co-Authors: K Kakimoto, Yasuhiro Iijima, Takashi SaitohAbstract:Abstract Continuous Deposition of Gd2Zr2O7 films was carried out on 10 mm width Hastelloy tapes by ion-beam-Assisted Deposition (IBAD). They were uniformly deposited with the in-plane mosaic spread (Δφ) of 10–12° in the 15 m length and of 16–18° in the 60 m length, at a production rate of 1.0 m/h. In an optimized sample, Ic of 140 A and Jc of 1.2 MA/cm2 were obtained at the length of 8 cm. Continuous Deposition of Y-123 films was performed by pulsed laser Deposition on long IBAD template tapes at a tape speed of 1.0 m/h. Ic of 50.0 A and Jc of 0.42 MA/cm2 were obtained at the length of 9.6 m with Δφ for the Y-123 film was 9°. Furthermore, Ic of 50.0 A and Jc of 1.0 MA/cm2 were obtained in a 8 cm Y-123 sample with Δφ of 8° at a tape speed of 4.0 m/h.
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growth structure of yttria stabilized zirconia films during off normal ion beam Assisted Deposition
Journal of Materials Research, 1998Co-Authors: Yasuhiro Iijima, Mariko Hosaka, Nobuo Tanabe, Nobuyuki Sadakata, Takashi Saitoh, Osamu Kohno, K TakedaAbstract:Biaxially aligned YSZ thin films with strong [100] fiber texture were formed on a polycrystalline Ni-based alloy by off-normal ion-beam-Assisted Deposition. Growth structures were characterized by x-ray diffraction (XRD), transmission electron microscopy (TEM), atomic force microscopy (AFM), etc., and the alignment mechanism was discussed using a selective growth model. Peculiar structural evolution of the crystalline orientation was observed and its development was well described by an exponential equation. It was explained as a collaboration of an anisotropic growth condition and epitaxial crystallization. The [100] fiber texture was formed by columnar structures of diameter of 30–100 nm, which were composed of 5–10 nm diameter crystallites. Very smooth surfaces were observed by AFM imaging with a roughness of 2–3 nm and a peculiar ripple structure. The origin of the azimuthal alignment was discussed with emphasis on the surface structure of YSZ films produced using ion-beam-Assisted Deposition (IBAD) and the etching rate measurements of (100) surfaces of YSZ single crystals.
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biaxial alignment control of yba 2 cu 3 o 7 x films on random ni based alloy with textured yttrium stabilized zirconia films formed by ion beam Assisted Deposition
Journal of Materials Research, 1997Co-Authors: Yasuhiro Iijima, Mariko Hosaka, Nobuo Tanabe, Nobuyuki Sadakata, Takashi Saitoh, Osamu Kohno, K TakedaAbstract:Biaxially aligned YBa 2 Cu 3 O 7− x (YBCO) films were fabricated on random Ni-based alloy tapes with yttrium stabilized-zirconia (YSZ) buffer layers deposited by ion-beam-Assisted Deposition (IBAD). Ar + ion bombardment was found to have two significant effects on the crystalline structure of the YSZ buffer layers: to align a [100] axis with the substrate normal and a [111] axis with the bombarding beam axis. The resulting YSZ films were biaxially aligned on the random polycrystalline tapes, and the azimuthal distribution of the a - and b -axes of YBCO films on the top of the YSZ films was restricted to 10° FWHM. A critical current density ( J c ) of 1.13 × 10 6 A/cm 2 (77 K, 0 T) was obtained, and 1.1 × 10 5 A/cm 2 was maintained at 5 T (77 K, B⊥c). The existence of both intrinsic and extrinsic pinning properties was clearly observed in the angular dependence of J c with B⊥I. The longitudinal field effect on J c was clearly observed, which indicated straight transport currents. This is evidence for strongly coupled current paths that demonstrate the bulk pinning properties of YBCO.
J R Groves - One of the best experts on this subject based on the ideXlab platform.
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biaxially textured photovoltaic film crystal silicon on ion beam Assisted Deposition caf2 seed layers on glass
Energy and Environmental Science, 2012Co-Authors: J R Groves, B M Clemens, Vincenzo Lasalvia, F S Hasoon, Howard M Branz, Charles W TeplinAbstract:We grow biaxially textured heteroepitaxial crystal silicon (c-Si) films on display glass as a low-cost photovoltaic material. We first fabricate textured CaF2 seed layers using ion-beam Assisted Deposition, then coat the CaF2 with a thin, evaporated epitaxial Ge buffer and finally deposit heteroepitaxial silicon on the Ge. The silicon is grown by hot-wire chemical vapor Deposition, a high-rate, scalable epitaxy technology. Electron and X-ray diffraction confirm the biaxial texture of the CaF2 and epitaxial growth of the subsequent layers. Transmission electron microscopy reveals columnar silicon grains about 500 nm across. We fabricate a proof-of-concept epitaxial film c-Si solar cell with an open circuit voltage of 375 mV that is limited by minority carrier lifetime.
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biaxial texture development in the ion beam Assisted Deposition of magnesium oxide
Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms, 2012Co-Authors: J R Groves, Vladimir Matias, L Stan, R F Depaula, Robert H Hammond, B M ClemensAbstract:Low-energy ion-beam irradiation (<1 keV) during the concurrent Deposition of cubic oxide materials results in the growth of crystallographically textured thin films. A model system, magnesium oxide (MgO), has been successfully used as a biaxially textured template film for the heteroepitaxial Deposition of many materials with texture dependent properties like high temperature superconductors, tunable microwave materials, and ferroelectrics. Here, we present data on the initial nucleation of biaxial crystallographic texture in this model system using an in situ quartz crystal microbalance (QCM) substrate combined with in situ reflected high-energy electron diffraction (RHEED). Correlation of mass uptake with the RHEED images of the growing surface shows that the development of crystallographic biaxial texture in this material system occurs suddenly as the initially polycrystalline MgO films reaches a critical film thickness of 2 nm. This texture continues to improve during subsequent growth. A simple model shows that the effect is not due simply to coverage effects. We use a combination of in situ RHEED and ex situ transmission electron microscopy to further elucidate the mechanism of this sudden texture formation. We present a physical model to describe this behavior and explain the role of ion-to-atom arrival ratio and underlying nucleation surface on texture development.
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growth of thick yba2cu3o7 δ films carrying a critical current of over 230 a cm on single lamno3 buffered ion beam Assisted Deposition mgo substrates
Journal of Materials Research, 2003Co-Authors: M Paranthaman, J R Groves, Raymond F. Depaula, P N Arendt, S R Foltyn, L Stan, T Aytug, D K Christen, Hsinglin Wang, Terry G. HolesingerAbstract:A single LaMnO 3 buffer layer was developed for the growth of superconducting thick YBa 2 Cu 3 O 7 - δ (YBCO) films on polycrystalline Ni-alloy substrates where a biaxially textured MgO layer, produced by ion-beam Assisted Deposition (IBAD), was used as a template. Using pulsed laser Deposition, a 1.65-μm-thick YBCO film with a critical current density of 1.4 x 10 6 A/cm 2 in self field at 75 K was achieved on sputtered LaMnO 3 -buffered IBAD MgO substrates. This corresponds to a critical current (I c ) of 231 A/cm-width. This result demonstrates the possibility of using both LaMnO 3 buffer and IBAD MgO template for producing high current density YBCO-coated conductors.
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high critical current density yba 2 cu 3 o 7δ thick films using ion beam Assisted Deposition mgo bi axially oriented template layers on nickel based superalloy substrates
Journal of Materials Research, 2001Co-Authors: J R Groves, Raymond F. Depaula, Terry G. Holesinger, P N Arendt, S R Foltyn, Q X Jia, H Kung, E J Peterson, P C Dowden, L StanAbstract:Nickel-based superalloys have been coated with magnesium oxide (MgO) using ion-beam-Assisted Deposition (IBAD). This technique produced a well-oriented bi-axially textured MgO template layer with a Ф scan full width half maximum of 6.4°. The layer architecture for these samples was as follows: polished hastelloy C276/amorphous Si 3 N 4 /IBAD MgO/ pulsed laser deposited (PLD) Y 2 O 3 –ZrO 2 /PLD CeO 2 /PLD YBa 2 Cu 3 O 7?δ . The subsequent heteroepitaxial PLD of 1.5-mm-thick YBCO showed a nominal critical current density of over 1 MA/cm 2 (75 K, self-field) along a microbridge and had an in-plane mosaic spread of 4.8° and an out-of-plane spread of 1.3°. These results compare well with our earlier work using IBAD yttria-stabilized zirconia (YSZ) as a template layer and indicate that IBAD MgO is a suitable substitute. Furthermore, these results suggest that IBAD MgO could be adapted to and increase the feasibility of a continuous process to fabricate longer lengths of coated conductors at speeds 100 times faster than that previously realized with IBAD YSZ.
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High-current Y-Ba-Cu-O coated conductor using metal organic chemical-vapor Deposition and ion-beam-Assisted Deposition
IEEE Transactions on Applied Superconductivity, 2001Co-Authors: Venkat Selvamanickam, G. Carota, J R Groves, Uthamalingam Balachandran, Philipp Arendt, Magdalena Chudzik, M. Funk, N. Vo, Pradeep Haldar, Rogério DepaulaAbstract:YBa2Cu2Ox (YBCO) films have been deposited on buffered metal substrates by metal organic chemical-vapor Deposition (MOCVD), Nickel alloy substrates with biaxially-textured yttria-stabilized zirconia (YSZ) buffer layers deposited by ion-beam-Assisted Deposition (IBAD) were used. A liquid-static precursor delivery system was designed, constructed, and used in the MOCVD facility at Intermagnetics for the reported work, At 77 K, under self-field conditions, we achieved a critical current (I-c) of 97.5 A In YBCO film grown by MOCVD on an IBAD substrate. This I-c corresponds to a critical current density of 1.3 MA/cm(2) and 130 A/cm width of tape.
S R Foltyn - One of the best experts on this subject based on the ideXlab platform.
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polymer Assisted Deposition of metal oxide films
Nature Materials, 2004Co-Authors: Quanxi Jia, T M Mccleskey, Anthony K Burrell, Y Lin, Gavin E Collis, Haiyan Wang, S R FoltynAbstract:Metal oxides are emerging as important materials for their versatile properties such as high-temperature superconductivity, ferroelectricity, ferromagnetism, piezoelectricity and semiconductivity. Metal-oxide films are conventionally grown by physical and chemical vapour Deposition. However, the high cost of necessary equipment and restriction of coatings on a relatively small area have limited their potential applications. Chemical-solution Depositions such as sol-gel are more cost-effective, but many metal oxides cannot be deposited and the control of stoichiometry is not always possible owing to differences in chemical reactivity among the metals. Here we report a novel process to grow metal-oxide films in large areas at low cost using polymer-Assisted Deposition (PAD), where the polymer controls the viscosity and binds metal ions, resulting in a homogeneous distribution of metal precursors in the solution and the formation of uniform metal-organic films. The latter feature makes it possible to grow simple and complex crack-free epitaxial metal-oxides.
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growth of thick yba2cu3o7 δ films carrying a critical current of over 230 a cm on single lamno3 buffered ion beam Assisted Deposition mgo substrates
Journal of Materials Research, 2003Co-Authors: M Paranthaman, J R Groves, Raymond F. Depaula, P N Arendt, S R Foltyn, L Stan, T Aytug, D K Christen, Hsinglin Wang, Terry G. HolesingerAbstract:A single LaMnO 3 buffer layer was developed for the growth of superconducting thick YBa 2 Cu 3 O 7 - δ (YBCO) films on polycrystalline Ni-alloy substrates where a biaxially textured MgO layer, produced by ion-beam Assisted Deposition (IBAD), was used as a template. Using pulsed laser Deposition, a 1.65-μm-thick YBCO film with a critical current density of 1.4 x 10 6 A/cm 2 in self field at 75 K was achieved on sputtered LaMnO 3 -buffered IBAD MgO substrates. This corresponds to a critical current (I c ) of 231 A/cm-width. This result demonstrates the possibility of using both LaMnO 3 buffer and IBAD MgO template for producing high current density YBCO-coated conductors.
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Continuous electropolishing of Hastelloy substrates for ion-beam Assisted Deposition of MgO
Superconductor Science and Technology, 2003Co-Authors: S. Kreiskott, Paul N. Arendt, S R Foltyn, Lawrence E. Bronisz, Vladimir MatiasAbstract:We demonstrate the applicability of continuous electropolishing for the preparation of metal tapes for ion-beam Assisted Deposition of MgO for the fabrication of in-plane textured template layers. These templates are used for the fabrication of second generation high temperature superconducting wires utilizing YBa2Cu3O7−δ coatings on metallic substrates. Surface roughness values below 1 nm and local slopes of less than 1° could be achieved with the electropolishing process. Mean surface roughness values are lower with the use of electropolishing and slopes of surface roughness inclines are significantly reduced compared to the best results of mechanical polishing (3.5 nm and 5°, respectively). The cost-effective process of electropolishing shows great promise for the fabrication of second generation high temperature superconducting wire.
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high critical current density yba 2 cu 3 o 7δ thick films using ion beam Assisted Deposition mgo bi axially oriented template layers on nickel based superalloy substrates
Journal of Materials Research, 2001Co-Authors: J R Groves, Raymond F. Depaula, Terry G. Holesinger, P N Arendt, S R Foltyn, Q X Jia, H Kung, E J Peterson, P C Dowden, L StanAbstract:Nickel-based superalloys have been coated with magnesium oxide (MgO) using ion-beam-Assisted Deposition (IBAD). This technique produced a well-oriented bi-axially textured MgO template layer with a Ф scan full width half maximum of 6.4°. The layer architecture for these samples was as follows: polished hastelloy C276/amorphous Si 3 N 4 /IBAD MgO/ pulsed laser deposited (PLD) Y 2 O 3 –ZrO 2 /PLD CeO 2 /PLD YBa 2 Cu 3 O 7?δ . The subsequent heteroepitaxial PLD of 1.5-mm-thick YBCO showed a nominal critical current density of over 1 MA/cm 2 (75 K, self-field) along a microbridge and had an in-plane mosaic spread of 4.8° and an out-of-plane spread of 1.3°. These results compare well with our earlier work using IBAD yttria-stabilized zirconia (YSZ) as a template layer and indicate that IBAD MgO is a suitable substitute. Furthermore, these results suggest that IBAD MgO could be adapted to and increase the feasibility of a continuous process to fabricate longer lengths of coated conductors at speeds 100 times faster than that previously realized with IBAD YSZ.
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ion beam Assisted Deposition of bi axially aligned mgo template films for ybco coated conductors
IEEE Transactions on Applied Superconductivity, 1999Co-Authors: J R Groves, Raymond F. Depaula, Terry G. Holesinger, P N Arendt, S R Foltyn, E J Peterson, C P Wang, J Y Coulter, R W Springer, R H HammondAbstract:We report the results of experiments with ion-beam-Assisted Deposition (IBAD) of MgO using in-situ monitoring with Reflected High-Energy Electron Diffraction (RHEED). Strips of polished Haynes 242 and Inconel 625 nickel-based super-alloys have been used as substrates for these experiments. The in-plane texture of the MgO, as measured by X-ray /spl phi/ scan, resulted in FWHM values between 11 and 15/spl deg/. Using pulsed-laser Deposition, the IBAD MgO template films were then overcoated with buffer layer films and a final superconducting film of YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta//. The best superconducting transport properties measured on these YBCO films were: an Ic (75 K, self-field, 1 cm wide) of 41.6 A, and a narrow-bridge J/sub c/ (1.35 /spl mu/m thick film) of 0.46 MA/cm/sup 2/.
L Stan - One of the best experts on this subject based on the ideXlab platform.
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biaxial texture development in the ion beam Assisted Deposition of magnesium oxide
Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms, 2012Co-Authors: J R Groves, Vladimir Matias, L Stan, R F Depaula, Robert H Hammond, B M ClemensAbstract:Low-energy ion-beam irradiation (<1 keV) during the concurrent Deposition of cubic oxide materials results in the growth of crystallographically textured thin films. A model system, magnesium oxide (MgO), has been successfully used as a biaxially textured template film for the heteroepitaxial Deposition of many materials with texture dependent properties like high temperature superconductors, tunable microwave materials, and ferroelectrics. Here, we present data on the initial nucleation of biaxial crystallographic texture in this model system using an in situ quartz crystal microbalance (QCM) substrate combined with in situ reflected high-energy electron diffraction (RHEED). Correlation of mass uptake with the RHEED images of the growing surface shows that the development of crystallographic biaxial texture in this material system occurs suddenly as the initially polycrystalline MgO films reaches a critical film thickness of 2 nm. This texture continues to improve during subsequent growth. A simple model shows that the effect is not due simply to coverage effects. We use a combination of in situ RHEED and ex situ transmission electron microscopy to further elucidate the mechanism of this sudden texture formation. We present a physical model to describe this behavior and explain the role of ion-to-atom arrival ratio and underlying nucleation surface on texture development.
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growth of thick yba2cu3o7 δ films carrying a critical current of over 230 a cm on single lamno3 buffered ion beam Assisted Deposition mgo substrates
Journal of Materials Research, 2003Co-Authors: M Paranthaman, J R Groves, Raymond F. Depaula, P N Arendt, S R Foltyn, L Stan, T Aytug, D K Christen, Hsinglin Wang, Terry G. HolesingerAbstract:A single LaMnO 3 buffer layer was developed for the growth of superconducting thick YBa 2 Cu 3 O 7 - δ (YBCO) films on polycrystalline Ni-alloy substrates where a biaxially textured MgO layer, produced by ion-beam Assisted Deposition (IBAD), was used as a template. Using pulsed laser Deposition, a 1.65-μm-thick YBCO film with a critical current density of 1.4 x 10 6 A/cm 2 in self field at 75 K was achieved on sputtered LaMnO 3 -buffered IBAD MgO substrates. This corresponds to a critical current (I c ) of 231 A/cm-width. This result demonstrates the possibility of using both LaMnO 3 buffer and IBAD MgO template for producing high current density YBCO-coated conductors.
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high critical current density yba 2 cu 3 o 7δ thick films using ion beam Assisted Deposition mgo bi axially oriented template layers on nickel based superalloy substrates
Journal of Materials Research, 2001Co-Authors: J R Groves, Raymond F. Depaula, Terry G. Holesinger, P N Arendt, S R Foltyn, Q X Jia, H Kung, E J Peterson, P C Dowden, L StanAbstract:Nickel-based superalloys have been coated with magnesium oxide (MgO) using ion-beam-Assisted Deposition (IBAD). This technique produced a well-oriented bi-axially textured MgO template layer with a Ф scan full width half maximum of 6.4°. The layer architecture for these samples was as follows: polished hastelloy C276/amorphous Si 3 N 4 /IBAD MgO/ pulsed laser deposited (PLD) Y 2 O 3 –ZrO 2 /PLD CeO 2 /PLD YBa 2 Cu 3 O 7?δ . The subsequent heteroepitaxial PLD of 1.5-mm-thick YBCO showed a nominal critical current density of over 1 MA/cm 2 (75 K, self-field) along a microbridge and had an in-plane mosaic spread of 4.8° and an out-of-plane spread of 1.3°. These results compare well with our earlier work using IBAD yttria-stabilized zirconia (YSZ) as a template layer and indicate that IBAD MgO is a suitable substitute. Furthermore, these results suggest that IBAD MgO could be adapted to and increase the feasibility of a continuous process to fabricate longer lengths of coated conductors at speeds 100 times faster than that previously realized with IBAD YSZ.
