Vortex properties in superconducting Nb/Pd multilayers

Coccorese, C.; Attanasio, C.; Mercaldo, Lucia V.; Salvato, M.; Maritato, L.; Slaughter, J. M.; Falco, C. M.; Prischepa, S. L.

doi:10.1103/physrevb.57.7922

Cited by 21 publications

(24 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In parallel magnetic fields due to the intrinsic pinning and commensurability effect the critical current (when the transport current flows in the layer planes) should be an oscillating function of magnetic field [1,4]. This result was obtained experimentally, as was mentioned above, on alloys with a spatial modulation of the component concentration [2] and on Nb/Ta multilayers [27]. The theoretical results cited above have been obtained mostly for high-T c superconductors.…”

Section: Introductionsupporting

confidence: 59%

See 1 more Smart Citation

Commensurate vortex lattices and oscillation effects in superconducting Mo/Si and W/Si multilayers

Mikhaı̆lov

Yuzephovich

Bomze

et al. 2005

Low Temperature Physics

View full text Add to dashboard Cite

We report experimental results of the vortex lattice structure investigation in the artificial superconducting Mo/Si and W/Si superlattices. The resistance R and critical current I c measurements in parallel magnetic fields have been performed as well as measurements in tilted magnetic fields. At temperatures where condition of strong layering is satisfied the dependences I H c ( ) || and R H ( ) || reveal oscillation behavior. It is shown that the appearance of oscillations and of reentrant behavior (vanishing of resistivity in definite ranges of H || ) are due to the strong intrinsic pinning and to the effect of commensurability between the vortex lattice period and multilayer wavelength. The locations of I H c ( ) || and R H ( ) || extrema correspond to the stable states of a commensurate vortex lattice. Our experimental data are in good quantitative agreement with Ivlev, Kopnin, and Pokrovsky (IKP) theory. It is shown that the values of the commensurability fields depend exclusively on the superlattice period s and anisotropy coefficient g and do not depend on the type of materials used for multilayer preparation. The memory effect, i.e., dependence of the oscillation pattern on the magnetic history of the sample, is observed. It is shown experimentally that the state of the vortex matter in the layered superconductors is essentially different from that of type-II superconductors with a random distribution of the pinning centers. Investigation of oscillation and reentrance behavior may be used as a new tool for vortex lattice arrangement study in layered superconductors. The essential advantage of this method is connected with its simplicity and with the possibility of using it in arbitrary large fields. Investigations of the commensurate states may be used for rather precise determination of the anisotropy coefficient g.

show abstract

Section: Introductionsupporting

confidence: 59%

“…The appearance of nonmonotonic I c vs H || dependence only below the crossover temperature is also reported in Ref. 27.…”

Section: Resultsmentioning

confidence: 66%

Commensurate vortex lattices and oscillation effects in superconducting Mo/Si and W/Si multilayers

Mikhaı̆lov

Yuzephovich

Bomze

et al. 2005

Low Temperature Physics

View full text Add to dashboard Cite

show abstract

“…The idea of commensurability ͑originally contributed by Pippard for explaining the peak effect in type II superconductors 13 ͒ between the period of the multilayer structure and the vortex lattice spacing was put forward to account for the peak effect in the J c (H 0 ) dependencies experimentally observed at the beginning of the seventies by Raffy et al 14,15 However the Ami-Maki solution is valid close to the upper critical magnetic field H c2 and does not explain the observed temperature dependence of the magnetic field H p at which the peak effect occurs. 15,16 Kulić and Rys 9 calculated the J c (H 0 ) dependence in the case of twinning planes considered as perturbations in the range of the magnetic fields H c1 ӶH 0 ӶH c2 , where H c1 is the lower critical magnetic field. Again, their model did not describe the temperature dependence of the H p field.…”

mentioning

confidence: 99%

“…Moreover, analysis show that in the region of the J c (H 0 ) peak effect the fields of the maximum values of the J c and the F p max coincide within the accuracy of a few percents and their temperature dependencies are the same. 16 In this article we apply to the J c (H 0 ) peak effect problem a rather simple interpolation procedure based on the GL theory for S/N multilayers in the case of d N Ϸd S . Dediu et al 17 proposed a version of such a model restoring the temperature dependencies of the upper critical fields, which were obtained in microscopic theories and were in agreement with the experimental results.…”

mentioning

confidence: 99%

Pinning force and peak effect in superconductor/normal-metal multilayers

et al. 2001

Self Cite

View full text Add to dashboard Cite

We analyzed the temperature, the magnetic field, and the normal layer thickness dependencies of the pinning force F p in superconductor/normal metal multilayers in the framework of the Ginzburg-Landau ͑GL͒ theory. In particular, we studied the temperature dependence of the magnetic field H p at which are observed both the peak of the critical current density J c curves versus the external magnetic field H 0 and the maximum pinning force F p max in the F p (H 0 ) dependencies. We show that, well below the critical temperature T c , the magnetic field H p corresponds to the magnetic field H D of the periodic solution of the GL equations and the H D versus temperature dependence well describes the experimental data.

show abstract

“…[2][3][4][5][6][7][8][9][10][11][12] In particular, rather comprehensive understanding of the nature of the dimensional crossover-namely, the transition from three-dimensional ͑3D͒ to two-dimensional ͑2D͒ mode upon a variation of the temperature T-leads to deeper insight into the interaction between the superconducting layers and into the superconducting phase nucleation. [13][14][15] Recently, 16,17 we have shown that the dimensionality of finite S/N multilayers can be influenced by the "odd-even" effect related to the sample finiteness ͑in particular, the number of bilayers, odd or even͒ which determines the nucleation position of the superconducting phase.…”

Section: Introductionmentioning

confidence: 99%

Effect of geometrical symmetry on the angular dependence of the critical magnetic field in superconductor/normal metal multilayers

et al. 2005

Self Cite

View full text Add to dashboard Cite

The angular dependence of the upper critical field, H c ͑⌰͒, for Nb/ Pd multilayers with different geometrical symmetries ͑i.e., with an even or an odd number of bilayers, N bil ͒ and thickness of Nb and Pd layers of the order of superconducting coherence length were investigated ͑the angle ⌰ is here defined from the plane parallel to the sample surface͒. The presence of an angular dimensional crossover at some temperature dependent angle ⌰ * ͑T͒ was established. At angles ⌰Ͻ⌰ * ͑T͒ the multilayers are in two-dimensional mode while at ⌰Ͼ⌰ * ͑T͒ they are in a three-dimensional one. In addition, the sample with odd N bil has a larger value of ⌰ * ͑T͒ with respect to the sample with even N bil . The experimental results have been qualitatively explained in the framework of the Ginzburg-Landau theory. It was shown that the main features of the H c ͑⌰͒ dependences in samples with even and odd N bil values are related to the different localizations of the superconducting order parameter.

show abstract

Vortex properties in superconducting Nb/Pd multilayers

Cited by 21 publications

References 30 publications

Commensurate vortex lattices and oscillation effects in superconducting Mo/Si and W/Si multilayers

Commensurate vortex lattices and oscillation effects in superconducting Mo/Si and W/Si multilayers

Pinning force and peak effect in superconductor/normal-metal multilayers

Effect of geometrical symmetry on the angular dependence of the critical magnetic field in superconductor/normal metal multilayers

Contact Info

Product

Resources

About