Abstract
Magnetization curves were measured for Bi2Sr2CaCu2O8 crystals which were irradiated with 5.8 GeV Pb ions along the c direction or at 45° with respect to it. Each ion produces continuous columnar that crosses the sample and yields a unidirectional pinning center. The density of the defects in the various samples ranges from 1010 to 2.5 X 1011 ions/cm2. In all the irradiated samples the width of the magnetization curves is found to be the largest for fields along the defects indicating that when the field is at other directions the vortices are tilted away from the defects. This manifests the important role of the Josephson coupling between the CuO2 planes. We also report on accelerated flux escape around zero magnetization and around zero field, particularly in samples with a high dose of irradiation.
| Original language | English |
|---|---|
| Pages (from-to) | 413-419 |
| Number of pages | 7 |
| Journal | Physica A: Statistical Mechanics and its Applications |
| Volume | 200 |
| Issue number | 1-4 |
| DOIs | |
| State | Published - 15 Nov 1993 |
Bibliographical note
Funding Information:It is a pleasure to acknowledgei mportant commentsa nd discussionsw ith L.N. Bulaevskii, L. Bunlachkov, V.B. Geshkenbein and V.M. Vinokur. The work in Israel is partially supportedb y the Ministry of Sciencea nd Technology and by a Grant from the G.I.F., the German-IsraeliF oundation for Scientific Research and Development.