RT Journal Article
T1 Origin of the inverse spin-switch behavior in manganite/cuprate/manganite trilayers
A1 Nemes, Norbert Marcel
A1 García Hernández, M.
A1 te Velthuis, S. G. E.
A1 Hoffmann, A.
A1 Visani, C.
A1 Garcia Barriocanal, Javier
A1 Peña, V.
A1 Arias Serna, Diego
A1 Sefrioui, Zouhair
A1 León Yebra, Carlos
A1 Santamaría Sánchez-Barriga, Jacobo
AB We studied ferromagnet/superconductor/ferromagnet trilayers based on La_(0.7)Ca_(0.3)MnO_(3) manganite and YBa_(2)Cu_(3)O_(7−δ) (YBCO) high-T_(c) cuprate with magnetoresistance and magnetization measurements. We find an inverse superconducting spin-switch behavior, where superconductivity is favored for parallel alignment of the magnetization in the ferromagnetic layers. We argue that this inverse superconducting spin switch originates from the transmission of spin-polarized carriers into the superconductor. In this picture, the thickness dependence of the magnetoresistance yields the spin-diffusion length in YBCO as 13 nm. A comparison of bilayers and trilayers allows ruling out the effect of the stray fields of the domain structure of the ferromagnet as the source of the inverse superconducting spin switch.
PB American Physical Society
SN 1098-0121
YR 2008
FD 2008-09
LK https://hdl.handle.net/20.500.14352/51403
UL https://hdl.handle.net/20.500.14352/51403
LA eng
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NO © 2008 The American Physical Society. This work was supported by MAT 2005 under Contract No. 06024 C02 01-02, the Joint US-Spain World Materials Proposal  NSF MWN Proposal DMR Contract No. 0709584 and MEC MAT 2007 Contract No. 30922-E, and by the US-DOE BES under Contract No. DE-AC02-06CH11357. N.M.N. acknowledges the “Ramon y Cajal” contract of the MICINN.
NO MAT 2005
NO Joint US-Spain World Materials Proposal  NSF MWN Proposal DMR
NO MEC MAT 2007
NO US-DOE BES
NO MICINN Spain under contract "Ramon y Cajal"
DS Docta Complutense
RD 8 may 2024