Substrate surface decoration with CeO2 nanoparticles: An effective method for improving flux pinning in YBa2Cu 3O7-δ films

T. Aytug; M. Paranthaman; A. A. Gapud; S. Kang; M. Varela; P. M. Martin; J. M. Raitano; S. W. Chan; J. R. Thompson; D. K. Christen

doi:10.1109/TASC.2007.899492

Substrate surface decoration with CeO₂ nanoparticles: An effective method for improving flux pinning in YBa₂Cu ₃O_7-δ films

T. Aytug, M. Paranthaman, A. A. Gapud, S. Kang, M. Varela, P. M. Martin, J. M. Raitano, S. W. Chan, J. R. Thompson, D. K. Christen

Nanomaterials Chemistry Group

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

10 Scopus citations

Abstract

We have demonstrated Improved critical current density, J_c, in YBa₂Cu₃O_7-δ(YBCO) Alms through a controlled study of substrate surface modifications with nano-sized second-phase pre-formed CeO₂ particles. Nanoparticles were applied to single crystal SrTiO₃ surfaces using suspension-based techniques prior to YBCO film growth. With the introduction of CeO₂ nanoparticles, YBCO films showed more robust field dependence at intermediate fields (J_c ∝ B^-α), where a smaller power law exponent of α ∼ 0.3 is obtained. The self-field J_c (77 K, B ∥ c) values of the YBCO films on reference and CeO₂ modified substrates are 1.1 and 1.9 MA/cm²; and at 1 Tesla 0.1 and 0.52 MA/cm², respectively. Consistent with this α-value, angular field dependent J _c and transmission electron microscopy studies indicate the presence of c-axis aligned correlated defects in these modified samples.

Original language	English
Pages (from-to)	3720-3723
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	17
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2007.899492
State	Published - Jun 2007

Funding

Manuscript received August 18, 2006. This work was supported by the U.S. Department of Energy, Office of Electricity Distribution and Energy Reliability. The research was performed at the Oak Ridge National Laboratory, managed by U.T.-Battelle, LLC for the USDOE under Contract No. DE-AC05-00OR22725. S.-W. Chan and J. M. Raitano acknowledge the support from NSF under DMR 0214650 and MRSEC Program (DMR-0213574) as well as DOE DE-FG02-05ER15730 for the ceria nanoparticles work.

Funders	Funder number
National Science Foundation	DMR 0214650
U.S. Department of Energy	DE-FG02-05ER15730
Office of Electricity Delivery and Energy Reliability
Materials Research Science and Engineering Center, Harvard University	DMR-0213574

Keywords

Coated conductors
Flux pinning
High temperature superconductivity
Nanoparticles
Surface decoration

Access to Document

10.1109/TASC.2007.899492

Cite this

Aytug, T., Paranthaman, M., Gapud, A. A., Kang, S., Varela, M., Martin, P. M., Raitano, J. M., Chan, S. W., Thompson, J. R., & Christen, D. K. (2007). Substrate surface decoration with CeO₂ nanoparticles: An effective method for improving flux pinning in YBa₂Cu ₃O_7-δ films. IEEE Transactions on Applied Superconductivity, 17(2), 3720-3723. https://doi.org/10.1109/TASC.2007.899492

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title = "Substrate surface decoration with CeO2 nanoparticles: An effective method for improving flux pinning in YBa2Cu 3O7-δ films",

abstract = "We have demonstrated Improved critical current density, Jc, in YBa2Cu3O7-δ(YBCO) Alms through a controlled study of substrate surface modifications with nano-sized second-phase pre-formed CeO2 particles. Nanoparticles were applied to single crystal SrTiO3 surfaces using suspension-based techniques prior to YBCO film growth. With the introduction of CeO2 nanoparticles, YBCO films showed more robust field dependence at intermediate fields (Jc ∝ B-α), where a smaller power law exponent of α ∼ 0.3 is obtained. The self-field Jc (77 K, B ∥ c) values of the YBCO films on reference and CeO2 modified substrates are 1.1 and 1.9 MA/cm2; and at 1 Tesla 0.1 and 0.52 MA/cm2, respectively. Consistent with this α-value, angular field dependent J c and transmission electron microscopy studies indicate the presence of c-axis aligned correlated defects in these modified samples.",

keywords = "Coated conductors, Flux pinning, High temperature superconductivity, Nanoparticles, Surface decoration",

author = "T. Aytug and M. Paranthaman and Gapud, {A. A.} and S. Kang and M. Varela and Martin, {P. M.} and Raitano, {J. M.} and Chan, {S. W.} and Thompson, {J. R.} and Christen, {D. K.}",

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Aytug, T , Paranthaman, M, Gapud, AA, Kang, S, Varela, M, Martin, PM, Raitano, JM, Chan, SW, Thompson, JR & Christen, DK 2007, 'Substrate surface decoration with CeO₂ nanoparticles: An effective method for improving flux pinning in YBa₂Cu ₃O_7-δ films', IEEE Transactions on Applied Superconductivity, vol. 17, no. 2, pp. 3720-3723. https://doi.org/10.1109/TASC.2007.899492

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AU - Gapud, A. A.

AU - Kang, S.

AU - Varela, M.

AU - Martin, P. M.

AU - Raitano, J. M.

AU - Chan, S. W.

AU - Thompson, J. R.

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AB - We have demonstrated Improved critical current density, Jc, in YBa2Cu3O7-δ(YBCO) Alms through a controlled study of substrate surface modifications with nano-sized second-phase pre-formed CeO2 particles. Nanoparticles were applied to single crystal SrTiO3 surfaces using suspension-based techniques prior to YBCO film growth. With the introduction of CeO2 nanoparticles, YBCO films showed more robust field dependence at intermediate fields (Jc ∝ B-α), where a smaller power law exponent of α ∼ 0.3 is obtained. The self-field Jc (77 K, B ∥ c) values of the YBCO films on reference and CeO2 modified substrates are 1.1 and 1.9 MA/cm2; and at 1 Tesla 0.1 and 0.52 MA/cm2, respectively. Consistent with this α-value, angular field dependent J c and transmission electron microscopy studies indicate the presence of c-axis aligned correlated defects in these modified samples.

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