Non-universal glass scaling behavior in transport properties of YBa2Cu3Oy films with columnar defects

T. Nojima; M. Katakura; S. Okayasu; N. Kobayashi

doi:10.1016/S0921-4534(02)01503-4

Non-universal glass scaling behavior in transport properties of YBa₂Cu₃O_y films with columnar defects

T. Nojima, M. Katakura, S. Okayasu, N. Kobayashi

Institute for Materials Research (IMR) (institute affiliation only)

Research output: Contribution to journal › Article

10 Citations (Scopus)

Abstract

Vortex phase diagrams have been studied on heavy-ion irradiated YBa₂Cu₃O_y films by the measurements of current-voltage (I-V) characteristics, resistance R and critical current density J_c as a function of magnetic field B parallel to the columnar defects. In the scaling analyses of the I-V data, we find the non-universal nature of the glass transition. The dynamic critical exponent z, which is almost constant at high fields, shows an anomalous peak and the glass transition line T_g(B) reveals an upturn behavior at B ∼ B_φ/3 with B_φ the matching field, where we also observe step-like behavior both in R(B) and J_c(B) curves. These results indicate the existence of a temperature-independent boundary in the B-T plane at which the dissipation mechanism changes.

Original language	English
Pages (from-to)	593-597
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	378-381
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0921-4534(02)01503-4
Publication status	Published - 2002 Oct 1

Keywords

Bose glass transition
Columnar defects
I-V characteristics
Vortex glass transition
YBaCuO films

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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Nojima, T., Katakura, M., Okayasu, S., & Kobayashi, N. (2002). Non-universal glass scaling behavior in transport properties of YBa₂Cu₃O_y films with columnar defects. Physica C: Superconductivity and its applications, 378-381(PART 1), 593-597. https://doi.org/10.1016/S0921-4534(02)01503-4

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abstract = "Vortex phase diagrams have been studied on heavy-ion irradiated YBa2Cu3Oy films by the measurements of current-voltage (I-V) characteristics, resistance R and critical current density Jc as a function of magnetic field B parallel to the columnar defects. In the scaling analyses of the I-V data, we find the non-universal nature of the glass transition. The dynamic critical exponent z, which is almost constant at high fields, shows an anomalous peak and the glass transition line Tg(B) reveals an upturn behavior at B ∼ Bφ/3 with Bφ the matching field, where we also observe step-like behavior both in R(B) and Jc(B) curves. These results indicate the existence of a temperature-independent boundary in the B-T plane at which the dissipation mechanism changes.",

keywords = "Bose glass transition, Columnar defects, I-V characteristics, Vortex glass transition, YBaCuO films",

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T1 - Non-universal glass scaling behavior in transport properties of YBa2Cu3Oy films with columnar defects

AU - Nojima, T.

AU - Katakura, M.

AU - Okayasu, S.

AU - Kobayashi, N.

PY - 2002/10/1

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N2 - Vortex phase diagrams have been studied on heavy-ion irradiated YBa2Cu3Oy films by the measurements of current-voltage (I-V) characteristics, resistance R and critical current density Jc as a function of magnetic field B parallel to the columnar defects. In the scaling analyses of the I-V data, we find the non-universal nature of the glass transition. The dynamic critical exponent z, which is almost constant at high fields, shows an anomalous peak and the glass transition line Tg(B) reveals an upturn behavior at B ∼ Bφ/3 with Bφ the matching field, where we also observe step-like behavior both in R(B) and Jc(B) curves. These results indicate the existence of a temperature-independent boundary in the B-T plane at which the dissipation mechanism changes.

AB - Vortex phase diagrams have been studied on heavy-ion irradiated YBa2Cu3Oy films by the measurements of current-voltage (I-V) characteristics, resistance R and critical current density Jc as a function of magnetic field B parallel to the columnar defects. In the scaling analyses of the I-V data, we find the non-universal nature of the glass transition. The dynamic critical exponent z, which is almost constant at high fields, shows an anomalous peak and the glass transition line Tg(B) reveals an upturn behavior at B ∼ Bφ/3 with Bφ the matching field, where we also observe step-like behavior both in R(B) and Jc(B) curves. These results indicate the existence of a temperature-independent boundary in the B-T plane at which the dissipation mechanism changes.

KW - Bose glass transition

KW - Columnar defects

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KW - Vortex glass transition

KW - YBaCuO films

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