Vortex Phase Diagram in Bi_2Sr_2CaCu_2O_<8+δ> with Damage Tracks Created by 30 MeV Fullerene Irradiation(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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Using 30 MeV C_<60> fullerene irradiation, we have produced latent tracks of diameter 20 nm and length 200 nm, near the surface of single crystalline Bi_2Sr2CaCu_2O_<8+δ>. A preliminary transmission electron microscopy study shows evidence for a very high density of deposited energy, and the ejection of material from the track core in very thin specimens. The latent tracks reveal themselves to be exceptionally strong pinning centers for vortices in the superconducting mixed state. Both the critical current density and magnetic irreversibility line are significantly enhanced. The irradiated crystals present salient features of the (B, T) phase diagram of vortex matter both of pristine crystals, such as the first order vortex phase transition, and the exponential Bose-glass line characteristic of heavy ionirradiated crystals. We show that the latter is manifestly independent of the pinning potential.
- 社団法人日本物理学会の論文
- 2004-10-15
著者
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VAN DER
Laboratry for Applied Physical Chemistry and Environmental Technology
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Kes P.
Kamerlingh Onnes Laboratory Leiden Univ.
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Kes P.
Kamerlingh Onnes Laboratorium Leiden University
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Li Ming
Department Of Internal Medicine And Molecular Science Graduate School Of Medicine B5 Osaka Universit
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Van Der
Laboratoire Des Solides Irradies
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Della-negra S.
Institut De Physique Nucleaire
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Li M
Shanghai Inst. Of Ceramics Chinese Acad. Of Sci. Shanghai Chn
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ISHIKAWA N.
Laboratoire des Solides Irradies
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DUNLOP A.
Laboratoire des Solides Irradies
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JASKIEROWICZ G.
Laboratoire des Solides Irradies
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LI Ming
Kamerlingh Onnes Laboratorium, Leiden University
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Li M
Inst. Of Zoology Chinese Acad. Of Sci. Beijing Chn
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