Effects of Columnar Defects on the Josephson Plasma Resonance in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub {ital y}}
- Department of Basic Science, The University of Tokyo, 3-8-1, Komaba, Meguro-ku, Tokyo 153 (Japan)
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Effects of columnar defects on the Josephson plasma resonance (JPR) were investigated in heavy-ion irradiated Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub y}. A microwave magnetoabsorption peak caused by the JPR shifted to higher fields with increasing defect densities. The amount of the shift indicated that the interlayer coupling was enhanced even above the matching field of the columnar defects. Another absorption peak was found around the matching field, which we attribute to a novel JPR caused by the nonmonotonic field dependence of the interlayer critical current density. These results indicated that the feature of the vortex system was drastically altered even by small number of columnar defects. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 491666
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 16 Vol. 78; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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