ISSN:
1573-7357
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We studied the critical state field profile using magneto-optical technique in YBa 2 Cu 3 O 7−δ with columnar defects (CDs) when the field is tilted away from CDs. We observed an asymmetric critical state field profile with the current discontinuity line (d-line) considerably away from the center of the sample. The shift of the d-line from the center (Δy) has symmetric hysteresis loop with respect to H = 0. When the field sweep direction is changed, the previous d-line disappears and a new d-line is generated at the opposite side. The shift of the d-line is parallel to the tilting plane of H and toward the direction of the misalignment of H from CDs. We interpret this asymmetry as caused by the in-plane magnetization, which is originated from the alignment of vortices to CDs. The field dependence of Δy is discussed in relation with the correlation length of vortices along CDs.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022529313885
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