Anisotropic scaling in YBa2Cu3O7 crystals with columnar defects

Details Anisotropic scaling in YBa2Cu3O7 crystals with columnar defects Anisotropic scaling in YBa2Cu3O7 crystals with columnar defects

2003-12-16

arxiv.org/abs/cond-mat/0312405v1

J. Low Temp. Phys. 135, 157 (2004)

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures, to be published in J. Low Temp. Phys

Scientific paper

10.1023/B:JOLT.0000016979.93781.

We explore the interplay between the mass anisotropy and the uniaxial pinning of tilted columnar defects (CD) in a YBa2Cu3O7 single crystal. At high temperatures T and fields H a sharp peak in the irreversible magnetization Mi at the direction of the tracks signals the presence of the CD. At low T such a peak is not observed, and the influence of the CD appears only as a perturbation to the angular dependence due to the anisotropy. We show that at low T and high H the uniaxial effects due to CD can be recovered by performing an anisotropic rescaling. As expected, this scaling fails at low H.

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