Strong vortex pinning in Co-doped BaFe2 As2 single crystal thin films

C. Tarantini; S. Lee; Y. Zhang; J. Jiang; C. W. Bark; J. D. Weiss; A. Polyanskii; C. T. Nelson; H. W. Jang; C. M. Folkman; S. H. Baek; X. Q. Pan; A. Gurevich; E. E. Hellstrom; C. B. Eom; D. C. Larbalestier

doi:10.1063/1.3383237

Strong vortex pinning in Co-doped BaFe₂ As₂ single crystal thin films

C. Tarantini, S. Lee, Y. Zhang, J. Jiang, C. W. Bark, J. D. Weiss, A. Polyanskii, C. T. Nelson, H. W. Jang, C. M. Folkman, S. H. Baek, X. Q. Pan, A. Gurevich, E. E. Hellstrom, C. B. Eom, D. C. Larbalestier

electron Microscopy and Microanalysis

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

68 Scopus citations

Abstract

We report the field and angular dependences of J_c of truly epitaxial Co-doped BaFe₂ As₂ thin films grown on SrTiO₃ / (La,Sr) (Al,Ta) O₃ with different SrTiO ₃ template thicknesses. The films show J_c comparable to single crystals and a maximum pinning force F_p (0.6 T_c) >5 GN/ m³ at H/H_irr ∼0.5 indicative of strong high-field vortex pinning. Due to the strong correlated c-axis pinning, J _c for field along the c-axis exceeds J_c for H||a _b plane, inverting the expectation of the H_c2 anisotropy. High resolution transmission electron microscopy reveals that the strong vortex pinning is due to a high density of nanosize columnar defects.

Original language	English
Article number	142510
Journal	Applied Physics Letters
Volume	96
Issue number	14
DOIs	https://doi.org/10.1063/1.3383237
State	Published - 2010

Funding

Work at NHMFL was supported under NSF Cooperative Agreement No. DMR-0084173, by the State of Florida, and by AFOSR Grant No. FA9550-06-1-0474. Work at the University of Wisconsin was supported by funding from the DOE Office of Basic Energy Sciences under Award No. DE-FG02-06ER46327. TEM work at the University of Michigan was supported by the DOE Grant No. DE-FG02-07ER46416. TEM facility was supported by NSF.

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Tarantini, C., Lee, S., Zhang, Y., Jiang, J., Bark, C. W., Weiss, J. D., Polyanskii, A., Nelson, C. T., Jang, H. W., Folkman, C. M., Baek, S. H., Pan, X. Q., Gurevich, A., Hellstrom, E. E., Eom, C. B., & Larbalestier, D. C. (2010). Strong vortex pinning in Co-doped BaFe₂ As₂ single crystal thin films. Applied Physics Letters, 96(14), Article 142510. https://doi.org/10.1063/1.3383237

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title = "Strong vortex pinning in Co-doped BaFe2 As2 single crystal thin films",

abstract = "We report the field and angular dependences of Jc of truly epitaxial Co-doped BaFe2 As2 thin films grown on SrTiO3 / (La,Sr) (Al,Ta) O3 with different SrTiO 3 template thicknesses. The films show Jc comparable to single crystals and a maximum pinning force Fp (0.6 Tc) >5 GN/ m3 at H/Hirr ∼0.5 indicative of strong high-field vortex pinning. Due to the strong correlated c-axis pinning, J c for field along the c-axis exceeds Jc for H||a b plane, inverting the expectation of the Hc2 anisotropy. High resolution transmission electron microscopy reveals that the strong vortex pinning is due to a high density of nanosize columnar defects.",

author = "C. Tarantini and S. Lee and Y. Zhang and J. Jiang and Bark, {C. W.} and Weiss, {J. D.} and A. Polyanskii and Nelson, {C. T.} and Jang, {H. W.} and Folkman, {C. M.} and Baek, {S. H.} and Pan, {X. Q.} and A. Gurevich and Hellstrom, {E. E.} and Eom, {C. B.} and Larbalestier, {D. C.}",

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doi = "10.1063/1.3383237",

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volume = "96",

journal = "Applied Physics Letters",

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AU - Tarantini, C.

AU - Lee, S.

AU - Zhang, Y.

AU - Jiang, J.

AU - Bark, C. W.

AU - Weiss, J. D.

AU - Polyanskii, A.

AU - Nelson, C. T.

AU - Jang, H. W.

AU - Folkman, C. M.

AU - Baek, S. H.

AU - Pan, X. Q.

AU - Gurevich, A.

AU - Hellstrom, E. E.

AU - Eom, C. B.

AU - Larbalestier, D. C.

PY - 2010

Y1 - 2010

N2 - We report the field and angular dependences of Jc of truly epitaxial Co-doped BaFe2 As2 thin films grown on SrTiO3 / (La,Sr) (Al,Ta) O3 with different SrTiO 3 template thicknesses. The films show Jc comparable to single crystals and a maximum pinning force Fp (0.6 Tc) >5 GN/ m3 at H/Hirr ∼0.5 indicative of strong high-field vortex pinning. Due to the strong correlated c-axis pinning, J c for field along the c-axis exceeds Jc for H||a b plane, inverting the expectation of the Hc2 anisotropy. High resolution transmission electron microscopy reveals that the strong vortex pinning is due to a high density of nanosize columnar defects.

AB - We report the field and angular dependences of Jc of truly epitaxial Co-doped BaFe2 As2 thin films grown on SrTiO3 / (La,Sr) (Al,Ta) O3 with different SrTiO 3 template thicknesses. The films show Jc comparable to single crystals and a maximum pinning force Fp (0.6 Tc) >5 GN/ m3 at H/Hirr ∼0.5 indicative of strong high-field vortex pinning. Due to the strong correlated c-axis pinning, J c for field along the c-axis exceeds Jc for H||a b plane, inverting the expectation of the Hc2 anisotropy. High resolution transmission electron microscopy reveals that the strong vortex pinning is due to a high density of nanosize columnar defects.

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DO - 10.1063/1.3383237

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VL - 96

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 14

M1 - 142510

ER -

Strong vortex pinning in Co-doped BaFe₂ As₂ single crystal thin films

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