A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Search for spin-polarization effects in La(0.7)Mn(0.3)Ca(3)O(3)/YBa(2)Cu(3)O(7-delta) thin-film bilayers
Tekijät: Deng X, Joshi M, Chakalova R, Colclough MS, Palai R, Tse YY, Jones IP, Huhtinen H, Muirhead CM
Kustantaja: AMER PHYSICAL SOC
Julkaisuvuosi: 2008
Lehti:: Physical Review B
Tietokannassa oleva lehden nimi: PHYSICAL REVIEW B
Lehden akronyymi: PHYS REV B
Artikkelin numero: ARTN 144528
Vuosikerta: 77
Numero: 14
Sivujen määrä: 10
ISSN: 1098-0121
DOI: https://doi.org/10.1103/PhysRevB.77.144528
Tiivistelmä
We describe a search for the effects of spin-polarized electrons in thin-film bilayers consisting of the high temperature superconductor YBa(2)Cu(3)O(7-delta) and the colossal magnetoresistive material La(0.7)Ca(0.3)MnO(3) by using penetration depth and critical current measurements. The work differs from that described in other works in that the YBa(2)Cu(3)O(7-delta) is grown with its c-axis lying in the plane of the thin film in order to investigate the effects of proximity suppression and also the injection of a spin-polarized current along the a/b-planes of the YBa(2)Cu(3)O(7-delta). We see a number of effects including field dependence of the average penetration depth and apparent suppression of the critical current by an injected current, with a gain greater than unity, but we argue that these are explicable in terms of a combination of heating and current summation, without any need to invoke the spin-polarization of the injected current.
We describe a search for the effects of spin-polarized electrons in thin-film bilayers consisting of the high temperature superconductor YBa(2)Cu(3)O(7-delta) and the colossal magnetoresistive material La(0.7)Ca(0.3)MnO(3) by using penetration depth and critical current measurements. The work differs from that described in other works in that the YBa(2)Cu(3)O(7-delta) is grown with its c-axis lying in the plane of the thin film in order to investigate the effects of proximity suppression and also the injection of a spin-polarized current along the a/b-planes of the YBa(2)Cu(3)O(7-delta). We see a number of effects including field dependence of the average penetration depth and apparent suppression of the critical current by an injected current, with a gain greater than unity, but we argue that these are explicable in terms of a combination of heating and current summation, without any need to invoke the spin-polarization of the injected current.
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