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Physical Review Letters
Volumn 70, Issue 20, 1993, Pages 3127-3130
Low temperature fluctuations of vortices in layered superconductors
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EID: 3242709533     PISSN: 00319007     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevLett.70.3127     Document Type: Article
Times cited : (42)
References (20)
  • 5
    • 3342950430 scopus 로고
    • Near Hc2 the situation is different: the major contribution comes from the fluctuating order parameter modulus:
    • (1992) Phys. Rev. Lett. , vol.69 , pp. 3563
    • Tešanović, Z.1
  • 9
    • 25944476448 scopus 로고
    • Magnetization measurements on aligned polycrystals, Ref. 10, may underestimate γ since even a small misalignment suppresses the apparent anisotropy. The information available for similar compounds indicates very high values of γ. Torque data on a single crystal Tl 2212 [, ] yield γ approx 300 as a lower bound., 69, 2276, have shown that the original estimate of γ approx 55 for Bi 2212 is probably an underestimate. The two dimensional scaling of the M(H,T) data on Bi 2223 at high temperatures, Ref. 2, suggests a large γ in this material as well. The latter has the same crystal structure as Tl 2223, so that one expects γ to be large in our case., J. C. Martinez et al., Phys. Rev. Lett.
    • (1990) Phys. Rev. B , vol.42 , pp. 6758
    • Farrell, D.E.1
  • 12
    • 84927488655 scopus 로고    scopus 로고
    • The measured field cooled magnetization of the powder, from which the sample was made, determines 4π M(1-N)= 8G at 6 K. Corrected for the randomness, this yields about 16 G for H parallel hat c. The NMR shift we report is about 100 G. Then at low T's, one can set B simeq Happl; this may result in an underestimate of λab(0), but will not change the low temperature behavior. The procedure may not be justifiable at high T's, where B-Happl may be of the same order as the shifts. However, it is the low temperatures which concern us most.
  • 17
    • 33744598099 scopus 로고
    • We take this value for λab(0) as a representative of literature values: 1100 AA, Ref. 7, 1730 AA, Ref. 10, and 1960 AA [, ]. The conclusion on the importance of fluctuations remains valid whichever of these values is chosen.
    • (1991) Z. Phys. B , vol.82 , pp. 9
    • Schilling, A.1

* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.