Magnetic field and orientation dependence of vortex motion in YBa2Cu3O7/PrBa2Cu3O 7 multilayers

Fusao Ichikawa, Bairu Zhao, Tetsuji Uchiyama, Ryohei Kawabata, Teruhide Koga, Takeshi Arai, Takeshi Fukami, Takafumi Aomine, Ji Jun Sun, Bo Xu, Lin Li

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Abstract

We have studied the vortex motion in YBa2Cu3O7/PrBa2Cu3O 7 (YBCO/PBCO) multilayers by measuring the magnetic field H and orientation dependence of the average activation energy Ū. The Ū of YBCO(24 Å)/PBCO(96 Å) multilayer system shows a logarithmic H dependence in the field region of 0.1-4 T. The H direction dependence of Ū shows that all Ū versus H sin φ of experimental points fall on the same line, Ū versus H (φ = 90°), in the whole applied field and orientation regions. Here, φ is the angle between H and the film plane under the condition of H ⊥ the transport current. These results suggest two dimensional vortex motion in the YBCO(24 Å)/PBCO(96 Å) multilayers. The deviations from the logH dependence at low fields (H < 0.1 T) and high fields (H > 4 T) are observed. The deviation at low fields is discussed on the basis of the interaction between vortices. The H dependence of Ū seems to follow a power-law behaviour in the high field. This suggests a possibility of coupling between the YBCO layers.

Original languageEnglish
Pages (from-to)275-280
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume264
Issue number3-4
DOIs
Publication statusPublished - Jun 15 1996

All Science Journal Classification (ASJC) codes

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

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    Ichikawa, F., Zhao, B., Uchiyama, T., Kawabata, R., Koga, T., Arai, T., Fukami, T., Aomine, T., Sun, J. J., Xu, B., & Li, L. (1996). Magnetic field and orientation dependence of vortex motion in YBa2Cu3O7/PrBa2Cu3O 7 multilayers. Physica C: Superconductivity and its applications, 264(3-4), 275-280. https://doi.org/10.1016/0921-4534(96)00279-1