Pinning enhancements in YBCO films via nanoengineered LaMnO3 :MgO composite cap layer

O. Polat; T. Aytug; M. Paranthaman; K. Kim; A. R. Lupini; H. M. Meyer; X. Qiu; J. R. Thompson; D. K. Christen; V. Selvamanickam

doi:10.1109/TASC.2010.2081333

Pinning enhancements in YBCO films via nanoengineered LaMnO₃ :MgO composite cap layer

O. Polat, T. Aytug, M. Paranthaman, K. Kim, A. R. Lupini, H. M. Meyer, X. Qiu, J. R. Thompson, D. K. Christen, V. Selvamanickam

Research output: Contribution to journal › Article › peer-review

Abstract

In the present work, composite LaMnO₃ MgO (LMO:MgO) cap buffer layers with varying MgO contents 5 vol% up to 75 vol% have been grown on homo-epi MgO/IBAD(MgO) substrates to enhance the performance of YBa ₂Cu₃O_7-x (YBCO) films. Results showed formation of phase separated MgO nanocolumns within the LMO matrix. The impact of these nanocolumns on the superconducting properties of YBCO films deposited using pulsed laser deposition (PLD) on the nanostructured layer was investigated by electrical transport measurements. Such YBCO films showed better in-field performance compared to that of YBCO films on standard LMO cap films. In particular, measurements of the field-angle dependence revealed c-axis correlated pinning for YBCO films on these composite cap layers. The present results demonstrate a practical approach to obtain high performance superconducting wires.

Original language	English
Article number	5640685
Pages (from-to)	3171-3174
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	21
Issue number	3 PART 3
DOIs	https://doi.org/10.1109/TASC.2010.2081333
State	Published - Jun 2011

Funding

Sample compositional characterization (HMM) was conducted at the Shared Research Equipment (SHaRE) user facility, which is sponsored at Oak Ridge National Laboratory by the Office of Basic Energy Sciences, Division of Scientific User Facilities, U.S. Department of Energy. Manuscript received August 01, 2010; accepted September 21, 2010. Date of publication November 18, 2010; date of current version May 27, 2011. This work was supported by the Office of Electricity Delivery and Energy Reliability, Advanced Cables and Conductors Program, (TA, MP, KK, DKC, JRT, SC), and Materials Sciences and Engineering Division, Office of Basic Energy Sciences, U.S. Department of Energy, (OP, MP, ARL).

Funders	Funder number
Division of Scientific User Facilities
Office of Basic Energy Sciences
U.S. Department of Energy
Office of Electricity Delivery and Energy Reliability
Oak Ridge National Laboratory
Division of Materials Sciences and Engineering

Keywords

IBAD-MgO
Index Terms-Critical current density
LMO:MgO buffer layers
PLD-YBCO
Phase separation

Access to Document

10.1109/TASC.2010.2081333

Cite this

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title = "Pinning enhancements in YBCO films via nanoengineered LaMnO3 :MgO composite cap layer",

abstract = "In the present work, composite LaMnO3 MgO (LMO:MgO) cap buffer layers with varying MgO contents 5 vol% up to 75 vol% have been grown on homo-epi MgO/IBAD(MgO) substrates to enhance the performance of YBa 2Cu3O7-x (YBCO) films. Results showed formation of phase separated MgO nanocolumns within the LMO matrix. The impact of these nanocolumns on the superconducting properties of YBCO films deposited using pulsed laser deposition (PLD) on the nanostructured layer was investigated by electrical transport measurements. Such YBCO films showed better in-field performance compared to that of YBCO films on standard LMO cap films. In particular, measurements of the field-angle dependence revealed c-axis correlated pinning for YBCO films on these composite cap layers. The present results demonstrate a practical approach to obtain high performance superconducting wires.",

keywords = "IBAD-MgO, Index Terms-Critical current density, LMO:MgO buffer layers, PLD-YBCO, Phase separation",

author = "O. Polat and T. Aytug and M. Paranthaman and K. Kim and Lupini, {A. R.} and Meyer, {H. M.} and X. Qiu and Thompson, {J. R.} and Christen, {D. K.} and V. Selvamanickam",

year = "2011",

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AU - Polat, O.

AU - Aytug, T.

AU - Paranthaman, M.

AU - Kim, K.

AU - Lupini, A. R.

AU - Meyer, H. M.

AU - Qiu, X.

AU - Thompson, J. R.

AU - Christen, D. K.

AU - Selvamanickam, V.

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N2 - In the present work, composite LaMnO3 MgO (LMO:MgO) cap buffer layers with varying MgO contents 5 vol% up to 75 vol% have been grown on homo-epi MgO/IBAD(MgO) substrates to enhance the performance of YBa 2Cu3O7-x (YBCO) films. Results showed formation of phase separated MgO nanocolumns within the LMO matrix. The impact of these nanocolumns on the superconducting properties of YBCO films deposited using pulsed laser deposition (PLD) on the nanostructured layer was investigated by electrical transport measurements. Such YBCO films showed better in-field performance compared to that of YBCO films on standard LMO cap films. In particular, measurements of the field-angle dependence revealed c-axis correlated pinning for YBCO films on these composite cap layers. The present results demonstrate a practical approach to obtain high performance superconducting wires.

AB - In the present work, composite LaMnO3 MgO (LMO:MgO) cap buffer layers with varying MgO contents 5 vol% up to 75 vol% have been grown on homo-epi MgO/IBAD(MgO) substrates to enhance the performance of YBa 2Cu3O7-x (YBCO) films. Results showed formation of phase separated MgO nanocolumns within the LMO matrix. The impact of these nanocolumns on the superconducting properties of YBCO films deposited using pulsed laser deposition (PLD) on the nanostructured layer was investigated by electrical transport measurements. Such YBCO films showed better in-field performance compared to that of YBCO films on standard LMO cap films. In particular, measurements of the field-angle dependence revealed c-axis correlated pinning for YBCO films on these composite cap layers. The present results demonstrate a practical approach to obtain high performance superconducting wires.

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