Magnetic-field penetration depth and the lower critical field of the quasi-two-dimensional superconductor<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Bi</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Sr</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml

Maeda, Akiko; Shibauchi, T.; Kondo, Naoko; Uchinokura, K.; Kobayashi, Makoto

doi:10.1103/physrevb.46.14234

Cited by 35 publications

(6 citation statements)

References 24 publications

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“…Numerous experiments on Bi2212 have suggested nonuniformity in its electronic properties. These include broad linewidths seen in inelastic neutron scattering experiments 16 , residual low-energy excitations in the superconducting state observed in penetration depth measurements 17 , finite spin susceptibility at low temperatures observed in NMR studies 18 , and short quasiparticle lifetimes detected by complex conductivity experiments 19 . The most recent of these are STM/STS measurements 2 that purport to directly image patch-shaped, electronically inhomogeneous regions.…”

Section: Discussionmentioning

confidence: 99%

Effect of chemical inhomogeneity in bismuth-based copper oxide superconductors

et al. 2004

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We examine the effect on the superconducting transition temperature (Tc) of chemical inhomogeneities in Bi2Sr2CuO 6+δ and Bi2Sr2CaCu2O 8+δ single crystals. Cation disorder at the Sr crystallographic site is inherent in these materials and strongly affects the value of Tc. Partial substitution of Sr by Ln (Ln = La, Pr, Nd, Sm, Eu, Gd, and Bi) in Bi2Sr1.6Ln0.4CuO 6+δ results in a monotonic decrease of Tc with increasing ionic radius mismatch. By minimizing Sr site disorder at the expense of Ca site disorder, we demonstrate that the Tc of Bi2Sr2CaCu2O 8+δ can be increased to 96 K. Based on these results we discuss the effects of chemical inhomogeneity in other bulk high-temperature superconductors.

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Section: Discussionmentioning

confidence: 99%

Effect of chemical inhomogeneity in bismuth-based copper oxide superconductors

et al. 2004

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“…The last equation comes from the combination of Eqs. (5) and (6). The above expansion is correct, since the equations corresponding to greater powers of H 0 are such that convergence is guaranteed.…”

Section: One Order Parameter -Conventional Superconductorsmentioning

confidence: 88%

“…Hardy et al observed linear T-dependence at low temperatures in YBCO [3] and Bonn et al observed a crossover from linear-T to T 2 upon Zn doping [4]. Also a T 2 behavior has been observed on BSCCO by Maeda et al [5]. The linear field-dependence is predicted by the d-wave scenario, according to Xu et al [6].…”

Section: Introductionmentioning

confidence: 93%

Nonlinear magnetization in superconductors withs+dordering

Betouras

Joynt

1998

Phys. Rev. B

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The nonlinear magnetization is considered within the Ginzburg-Landau theoretical framework, in the Meissner regime. A calculational method in the case of conventional superconductors (one order parameter) is developed and this method is extended for the case of two order parameters (s+d mixing).It is confirmed that corrections to the penetration depth, in the mean field analysis, are of the order of H 0 2 where H 0 is the applied field. We analyze carefully the possible solutions which lead to different scenarios in the physics of the symmetry of the order parameter. The anisotropy in the penetration depth is calculated and the temperature dependence of the magnetization is extracted. We discuss the relevant experimental results in the light of these calculations.

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“…The penetration depth is usually calculated by indirect methods. A lot of experimental methods such as AC susceptibility [1], surface impedance [2], infrared transition and reectivity [3], magnetization in low elds (in * corresponding author; e-mail: wmwoch@agh.edu.pl the Meissner state) [4] as well as in higher elds (in the mixed state) [5], muon spin rotation [6], electron spin resonance (ESR) [7], magnetic force microscopy (MFM) [8] and other have been used to determine the penetration depth in bulk and thin lms superconductors. There are a few direct methods of determining the penetration depths like that presented in the paper [9].…”

Section: Introductionmentioning

confidence: 99%

Penetration Depth of Tl_2Ba_2Ca_2Cu_3O_y and Tl_{0.58}Pb_{0.4}Sr_{1.6}Ba_{0.4}Ca_2Cu_3O_y Bulk Superconductors

et al. 2014

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The penetration depths of bulk Tl2Ba2Ca2Cu3Oy and Tl0.58Pb0.4Sr1.6Ba0.4Ca2Cu3Oy superconductors with the critical temperatures 112 K and 114 K, respectively, were determined from the AC susceptibility measurements. When the samples are in the Meissner state, the dispersive components of AC susceptibility as well as their temperature dependences reect the changes of the penetration depths at various temperatures. In these bulk ceramic superconductors the penetration depths are of the order of few µm and they are comparable to the grains sizes in the ceramics.

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Magnetic-field penetration depth and the lower critical field of the quasi-two-dimensional superconductorBi2Sr2

Cited by 35 publications

References 24 publications

Effect of chemical inhomogeneity in bismuth-based copper oxide superconductors

Effect of chemical inhomogeneity in bismuth-based copper oxide superconductors

Nonlinear magnetization in superconductors withs+dordering

Penetration Depth of Tl_2Ba_2Ca_2Cu_3O_y and Tl_{0.58}Pb_{0.4}Sr_{1.6}Ba_{0.4}Ca_2Cu_3O_y Bulk Superconductors

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