Improvement of the superconducting transition and demagnetization factor in YBa2Cu3O7-δ single crystals by laser cutting

Anand Bhattacharya, Daniel E. Grupp, Allen M. Goldman, Ulrich Welp

Research output: Contribution to journalArticlepeer-review

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Single crystals of YBa2Cu3O7-δ 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.

Original languageEnglish (US)
Pages (from-to)1792-1794
Number of pages3
JournalApplied Physics Letters
Issue number12
StatePublished - Sep 16 1996


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