Effect of proton irradiation and annealing on the critical current density in YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} single crystals
- Argonne National Lab., IL (United States)
We have studied the effect of annealing up to 350{degrees}C on the critical current densities in YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} single crystals that were irradiated with 3.5 MeV protons to a fluence of 1 {times} 10{sup 16} p+/cm{sup 2}. Large enhancements in the critical current densities, determined from DC-magnetization measurements, were observed immediately after irradiation at all temperatures for magnetic field orientations both parallel and perpendicular to the c-axis. These crystals were then annealed at room temperature, 100, 200, 300, and 350{degrees}C, and the critical current densities were determined after each annealing step. The annealing above room temperature resulted in a reduction of the critical current densities for both directions of the magnetic field. The transition temperatures, determined from low field DC-magnetization measurements at each stage of the measurement sequence, decreased by about 0.5 K following the irradiation and recovered to their original value after annealing at higher temperatures. We propose a defect model to explain the observed pining and its anisotropy observed in this work and earlier work on electron and neutron irradiated YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} single crystals.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 205923
- Report Number(s):
- ANL/MSD/PP-82087; ON: DE96006138
- Resource Relation:
- Other Information: PBD: Jan 1994
- Country of Publication:
- United States
- Language:
- English
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