Improvement of the superconducting transition and demagnetization factor in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystals by laser cutting
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
- Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Single crystals of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} have been cut into disc shapes using an excimer laser. The bulk superconducting transition was found to be sharpened in all cases measured. This is associated with the removal of material at the edges which may be depleted of oxygen or otherwise damaged. The magneto-optical images for one crystal have been correlated with the optical image. The angular dependence of the demagnetizing factor for field applied in the plane was drastically reduced in disc-shaped crystals relative to rectangular ones. The field of first flux entry was also increased. {copyright} {ital 1996 American Institute of Physics.}
- OSTI ID:
- 383722
- Journal Information:
- Applied Physics Letters, Vol. 69, Issue 12; Other Information: PBD: Sep 1996
- Country of Publication:
- United States
- Language:
- English
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