Effects of Zn doping on the anisotropic penetration depth of Y<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ba</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">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:

Panagopoulos, C.; Cooper, J. R.; Athanassopoulou, Nikoletta; Chrosch, J.

doi:10.1103/physrevb.54.r12721

Cited by 64 publications

(58 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zn substitution for Cu in the CuO 2 planes of YBCO has attracted a lot of interest, since it leads to a drastic decrease in T c [53] and a strong increase of the penetration depth [54] (superconductivity is destroyed with ∼ 10% of Zn). In addition, this decrease of T c is accompanied by an increase of the isotope coefficient (see Ref.…”

Section: Zn-doped Ybamentioning

confidence: 99%

See 1 more Smart Citation

The Isotope Effect in Superconductors

Bill

Kresin

Wolf

1998

Pair Correlations in Many-Fermion Systems

View full text Add to dashboard Cite

We review some aspects of the isotope effect (IE) in superconductors. Our focus is on the influence of factors not related to the pairing mechanism. After summarizing the main results obtained for conventional superconductors, we review the effect of magnetic impurities, the proximity effect and non-adiabaticity on the value of the isotope coefficient (IC). We discuss the isotope effect of T c and of the penetration depth δ. The theory is applied to conventional and high-T c superconductors. Experimental results obtained for YBa 2 Cu 3 O 7−δ related materials (Zn and Pr-substituted as well as oxygen-depleted systems) and for La 2−x Sr x CuO 4 are discussed.

show abstract

Section: Zn-doped Ybamentioning

confidence: 99%

“…It has been established by several methods (see Refs. [53,54]) that Zn substitution leads to the formation of local magnetic moments (∼ 0.63µ B /Zn, where µ B is the Bohr magneton) in the vicinity of Zn. Fig.…”

Section: Zn-doped Ybamentioning

confidence: 99%

The Isotope Effect in Superconductors

Bill

Kresin

Wolf

1998

Pair Correlations in Many-Fermion Systems

View full text Add to dashboard Cite

show abstract

“…Therefore, the temperature dependence of the depairing term should follow the T-dependence of 1/λ 2 (T) [15], where λ is the (in-plane) London penetration depth. Previous studies [16,17] found an almost linear temperature dependence of 1/λ 2 (T) for pure Y123 superconductors. It is seen from density.…”

Section: P-valuesmentioning

confidence: 99%

Temperature Dependence of the Zero-Field In-Plane Critical Current Density of YBa2Cu3O7-d High-Tc Superconductors

Sarkar¹,

Naqib

2012

J. Sci. Res.

View full text Add to dashboard Cite

The nature of the temperature dependence of the zero-field critical current density, J c0 (T), in the CuO 2 planes has been investigated for c-axis oriented YBa 2 Cu 3 O 7-δ (Y123) thin films over a range of hole content, p. The hole concentration was varied by changing the oxygen deficiency, δ, in the CuO 1-δ chains by annealing the films under different oxygen partial pressures and temperatures. The J c0 (T) values were extracted from the magnetic hysteresis (M-H) loops obtained at different temperatures. From the analysis of the J c0 (T) data for different sample compositions, we have extracted valuable information regarding the nature of the underlying magnetic flux pinning mechanisms in Y123 superconductors. We have found that the oxygen defects play only a secondary role in pinning of the vortices, the superfluid density, on the other hand plays a significant role. The exponent, n, governing the J c0 (T) behavior for a given sample composition showed a systematic behavior as hole contents are changed.

show abstract

“…(32). An approximate solution 36,39 , λ ef f ∼ 0.7λ c in the limit λ c ≫ λ ab can be used to estimate λ c . The systematic error in λ c obtained in such a way is less than ±2.5% even when λ c (0)/λ ab ∼ 4.…”

Section: Techniquementioning

confidence: 99%

“…However, the surface of the sample can be easily contaminated when the bulk polycrystalline sample is ground into fine powder. To obtain a clean surface, we prepared the sample either by grinding the bulk ceramic in an argon atmosphere, or by heat treating the powder after grinding in air 5,9,10,36,37,38 If we assume that all grains are spherical, then λ can be estimated from the magnetization according to the formula…”

Section: Techniquementioning

confidence: 99%