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Volumn 59, Issue 22, 1999, Pages 14772-14780

Evidence of two-dimensional josephson strings in high-purity (formula presented) single crystals

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EID: 4243657420     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.59.14772     Document Type: Article
Times cited : (7)

References (50)
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    • K. Deligiannis, Ph.D. thesis, University of Southampton, 1998.
    • K. Deligiannis, Ph.D. thesis, University of Southampton, 1998.
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    • Considering that for the unit cell of the Josephson vortex lattice, it is (Formula presented) see also Ref. 28
    • Considering that for the unit cell of the Josephson vortex lattice, it is (Formula presented) see also Ref. 28.
  • 35
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    • It is important to add that lock-in oscillations point out the exact type of the equilibrium vortex lattice experimentally realized. Indeed, theoretically (Ref. 26) it was found that in the case of a parallel to the layers magnetic field, a degeneracy in the free energy of the realized vortex lattice appears. In other words, the primitive cell of the compressed hexagonal lattice can “point” either along the planes (Fig. 33), with a ratio (Formula presented) or vertically to them (Ref. 26), with (Formula presented) However, in the latter case, when one works out the anisotropy parameters similarly to the way we have described above, the resulting anisotropy values are unphysically low: for example, for sample DT0, we get (Formula presented) and (Formula presented) This observed experimental removal of the degeneracy agrees with earlier reports in uniaxial materials [K. Takanaka, Anisotropy Effects in Superconductors, edited by H. W. Weber (Plenum, New York, 1977), p. 93].
    • It is important to add that lock-in oscillations point out the exact type of the equilibrium vortex lattice experimentally realized. Indeed, theoretically (Ref. 26) it was found that in the case of a parallel to the layers magnetic field, a degeneracy in the free energy of the realized vortex lattice appears. In other words, the primitive cell of the compressed hexagonal lattice can “point” either along the planes (Fig. 33), with a ratio (Formula presented) or vertically to them (Ref. 26), with (Formula presented) However, in the latter case, when one works out the anisotropy parameters similarly to the way we have described above, the resulting anisotropy values are unphysically low: for example, for sample DT0, we get (Formula presented) and (Formula presented) This observed experimental removal of the degeneracy agrees with earlier reports in uniaxial materials [K. Takanaka, Anisotropy Effects in Superconductors, edited by H. W. Weber (Plenum, New York, 1977), p. 93].
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    • Blatter, G.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.