Electronic anisotropy, magnetic field-temperature phase diagram and their dependence on resistivity in c-axis oriented MgB2 thin films

S. Patnaik; L. D. Cooley; A. Gurevich; A. A. Polyanskii; J. Jiang; X. Y. Cai; A. A. Squitieri; M. T. Naus; M. K. Lee; J. H. Choi; L. Belenky; S. D. Bu; J. Letteri; X. Song; D. G. Schlom; S. E. Babcock; C. B. Eom; E. E. Hellstrom; D. C. Larbalestier

doi:10.1088/0953-2048/14/6/304

Electronic anisotropy, magnetic field-temperature phase diagram and their dependence on resistivity in c-axis oriented MgB₂ thin films

S. Patnaik^*
, L. D. Cooley
, A. Gurevich
, A. A. Polyanskii
, J. Jiang
, X. Y. Cai
, A. A. Squitieri
, M. T. Naus
, M. K. Lee
, J. H. Choi
, L. Belenky
, S. D. Bu
, J. Letteri
, X. Song
, D. G. Schlom
, S. E. Babcock
, C. B. Eom
, E. E. Hellstrom
, D. C. Larbalestier

^*Corresponding author for this work

Department of Physics

University of Wisconsin-Madison
Pennsylvania State University

Research output: Contribution to journal › Journal article › peer-review

175 Scopus citations

Abstract

An important predicted, but so far uncharacterized, property of the new superconductor MgB₂ is electronic anisotropy arising from its layered crystal structure. Here we report on three c-axis oriented thin films, showing that the upper critical field anisotropy ratio H_c2^∥/H_c2^⊥ is 1.8 to 2.0, the ratio increasing with higher resistivity. Measurements of the magnetic field-temperature phase diagram show that flux pinning disappears at Hl* ≈ 0.8H_c2^⊥(T) in untextured samples. H_c2^∥(0) is strongly enhanced by alloying to 39 T for the highest resistivity film, more than twice that seen in bulk samples.

Original language	English
Pages (from-to)	315-319
Number of pages	5
Journal	Superconductor Science and Technology
Volume	14
Issue number	6
DOIs	https://doi.org/10.1088/0953-2048/14/6/304
State	Published - 2001.06

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Patnaik, S., Cooley, L. D., Gurevich, A., Polyanskii, A. A., Jiang, J., Cai, X. Y., Squitieri, A. A., Naus, M. T., Lee, M. K., Choi, J. H., Belenky, L., Bu, S. D., Letteri, J., Song, X., Schlom, D. G., Babcock, S. E., Eom, C. B., Hellstrom, E. E., & Larbalestier, D. C. (2001). Electronic anisotropy, magnetic field-temperature phase diagram and their dependence on resistivity in c-axis oriented MgB₂ thin films. Superconductor Science and Technology, 14(6), 315-319. https://doi.org/10.1088/0953-2048/14/6/304

@article{7f9fa3e09dfb4944aa5769b2c35ab1f1,

title = "Electronic anisotropy, magnetic field-temperature phase diagram and their dependence on resistivity in c-axis oriented MgB2 thin films",

abstract = "An important predicted, but so far uncharacterized, property of the new superconductor MgB2 is electronic anisotropy arising from its layered crystal structure. Here we report on three c-axis oriented thin films, showing that the upper critical field anisotropy ratio Hc2∥/Hc2⊥ is 1.8 to 2.0, the ratio increasing with higher resistivity. Measurements of the magnetic field-temperature phase diagram show that flux pinning disappears at Hl* ≈ 0.8Hc2⊥(T) in untextured samples. Hc2∥(0) is strongly enhanced by alloying to 39 T for the highest resistivity film, more than twice that seen in bulk samples.",

author = "S. Patnaik and Cooley, \{L. D.\} and A. Gurevich and Polyanskii, \{A. A.\} and J. Jiang and Cai, \{X. Y.\} and Squitieri, \{A. A.\} and Naus, \{M. T.\} and Lee, \{M. K.\} and Choi, \{J. H.\} and L. Belenky and Bu, \{S. D.\} and J. Letteri and X. Song and Schlom, \{D. G.\} and Babcock, \{S. E.\} and Eom, \{C. B.\} and Hellstrom, \{E. E.\} and Larbalestier, \{D. C.\}",

year = "2001",

month = jun,

doi = "10.1088/0953-2048/14/6/304",

language = "English",

volume = "14",

pages = "315--319",

journal = "Superconductor Science and Technology",

issn = "0953-2048",

number = "6",

}

Patnaik, S, Cooley, LD, Gurevich, A, Polyanskii, AA, Jiang, J, Cai, XY, Squitieri, AA, Naus, MT, Lee, MK, Choi, JH, Belenky, L, Bu, SD, Letteri, J, Song, X, Schlom, DG, Babcock, SE, Eom, CB, Hellstrom, EE & Larbalestier, DC 2001, 'Electronic anisotropy, magnetic field-temperature phase diagram and their dependence on resistivity in c-axis oriented MgB₂ thin films', Superconductor Science and Technology, vol. 14, no. 6, pp. 315-319. https://doi.org/10.1088/0953-2048/14/6/304

TY - JOUR

T1 - Electronic anisotropy, magnetic field-temperature phase diagram and their dependence on resistivity in c-axis oriented MgB2 thin films

AU - Patnaik, S.

AU - Cooley, L. D.

AU - Gurevich, A.

AU - Polyanskii, A. A.

AU - Jiang, J.

AU - Cai, X. Y.

AU - Squitieri, A. A.

AU - Naus, M. T.

AU - Lee, M. K.

AU - Choi, J. H.

AU - Belenky, L.

AU - Bu, S. D.

AU - Letteri, J.

AU - Song, X.

AU - Schlom, D. G.

AU - Babcock, S. E.

AU - Eom, C. B.

AU - Hellstrom, E. E.

AU - Larbalestier, D. C.

PY - 2001/6

Y1 - 2001/6

N2 - An important predicted, but so far uncharacterized, property of the new superconductor MgB2 is electronic anisotropy arising from its layered crystal structure. Here we report on three c-axis oriented thin films, showing that the upper critical field anisotropy ratio Hc2∥/Hc2⊥ is 1.8 to 2.0, the ratio increasing with higher resistivity. Measurements of the magnetic field-temperature phase diagram show that flux pinning disappears at Hl* ≈ 0.8Hc2⊥(T) in untextured samples. Hc2∥(0) is strongly enhanced by alloying to 39 T for the highest resistivity film, more than twice that seen in bulk samples.

AB - An important predicted, but so far uncharacterized, property of the new superconductor MgB2 is electronic anisotropy arising from its layered crystal structure. Here we report on three c-axis oriented thin films, showing that the upper critical field anisotropy ratio Hc2∥/Hc2⊥ is 1.8 to 2.0, the ratio increasing with higher resistivity. Measurements of the magnetic field-temperature phase diagram show that flux pinning disappears at Hl* ≈ 0.8Hc2⊥(T) in untextured samples. Hc2∥(0) is strongly enhanced by alloying to 39 T for the highest resistivity film, more than twice that seen in bulk samples.

UR - https://www.scopus.com/pages/publications/0035365582

U2 - 10.1088/0953-2048/14/6/304

DO - 10.1088/0953-2048/14/6/304

M3 - Journal article

AN - SCOPUS:0035365582

SN - 0953-2048

VL - 14

SP - 315

EP - 319

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 6

ER -

Electronic anisotropy, magnetic field-temperature phase diagram and their dependence on resistivity in c-axis oriented MgB₂ thin films

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