2011
DOI: 10.1134/s1063776111050177
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Electron transport in hybrid superconductor heterostructures with manganite interlayers

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Cited by 15 publications
(14 citation statements)
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“…This is much larger than the coherence length of the ferromagnets ξ F ß5 nm estimated for LSMO and SRO films [36]. Control measurements of the mesa structure with only the LSMO [17] or the SRO layer [36] showed that the critical current is absent (except in cases of pinholes) if the SRO and LSMO films are thicker than several nanometers. The critical current density j C decreases by an order of magnitude, when increasing d M from 8.5 to 53 nm.…”
Section: Josephson Current In Mesa Structuresmentioning
confidence: 88%
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“…This is much larger than the coherence length of the ferromagnets ξ F ß5 nm estimated for LSMO and SRO films [36]. Control measurements of the mesa structure with only the LSMO [17] or the SRO layer [36] showed that the critical current is absent (except in cases of pinholes) if the SRO and LSMO films are thicker than several nanometers. The critical current density j C decreases by an order of magnitude, when increasing d M from 8.5 to 53 nm.…”
Section: Josephson Current In Mesa Structuresmentioning
confidence: 88%
“…[14,15] reported evidence of long-range triplet superconducting correlations from Andreev reflections in structures with a La 0.7 Ca 0.3 MnO 3 ferromagnetic layer. Other experiments on similar structures, however, did not reveal superconducting currents (beyond those transmitted through pinholes) [16,17].…”
Section: Introductionmentioning
confidence: 99%
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“…After the transition to the ferromagnetic state of the LMO layer at temperature T < 140 K, a spin-polarized current appears in the mesastructure [3] and magnetic field affects the tunneling conductivity due to spin polarization [14]. The observed value of magnetoresistance of mesa-structure is typical for manganites [12] and took place only at temperatures below the critical temperature of bilayer Au-Nb. With an increase of dc bias voltage above 3 mV (about twice higher than the niobium energy gap), the conductivity of the mesa-structure no longer depends on magnetic field [16].…”
Section: Fig1mentioning
confidence: 85%
“…Hybrid mesa-structures were prepared from epitaxial films of superconducting cuprate YBa 2 Cu 3 O x (YBCO) and manganite LaMnO 3 (LMO) -materials having good chemical and crystalline compatibility [12]. The top superconducting electrode was thin film bilayer consisting of Nb and Au film, providing the contact with LMO manganite.…”
Section: Methodsmentioning
confidence: 99%