RT Journal Article
T1 Spin-dependent magnetoresistance of ferromagnet/superconductor/ferromagnet La_(0.7)Ca_(0.3)MnO_(3)/YBa_(2)Cu_(3)O_(7-δ)/La_(0.7)Ca_(0.3)MnO_(3) trilayers
A1 Visani, C.
A1 Peña, V.
A1 Garcia Barriocanal, Javier
A1 Arias Serna, Diego
A1 Sefrioui, Zouhair
A1 León Yebra, Carlos
A1 Santamaría Sánchez-Barriga, Jacobo
A1 Nemes, Norbert Marcel
A1 García Hernández, M.
A1 Martínez, J. L.
A1 te Velthuis, S. G. E.
A1 Hoffmann, A.
AB We report on large magnetoresistance in ferromagnet/superconductor/ferromagnet trilayer structures made of La_(0.7)Ca_(0.3)MnO_(3) and YBa_(2)Cu_(3)O_(7). We find that the shape and height of the magnetoresistance peaks are not modified when the relative orientation of current and magnetic field is changed from parallel to perpendicular. Furthermore, we find that the temperature shift of the resistance curves is independent of current and of the sweep rate of the magnetic field. These observations favor the view that the magnetoresistance phenomenon originates in the spin dependent transport of quasiparticles transmitted from the ferromagnetic electrodes into the superconductor, and rule out interpretations in terms of spontaneous vortices or anisotropic magnetoresistance of the ferromagnetic layers.
PB American Physical Society
SN 1098-0121
YR 2007
FD 2007-02
LK https://hdl.handle.net/20.500.14352/51413
UL https://hdl.handle.net/20.500.14352/51413
LA eng
NO © 2007 The American Physical Society. Work supported by MCYT MAT 2005-06024. Work at Argonne Laboratory was sponsored by the U.S. Department of Energy, Office of Basic Energy Science under Contract No. DE-AC02-06CH11357. N.N.M. is supported by the Juan de la Cierva Program of the Spanish Ministry of Education.
NO MCYT
NO U.S. Department of Energy, Office of Basic Energy Science
NO Spanish Ministry of Education under program "Juan de la Cierva"
DS Docta Complutense
RD 9 abr 2025