TY - JOUR
T1 - Origin of the inverse spin-switch behavior in manganite/cuprate/manganite trilayers
AU - Nemes, N. M.
AU - García-Hernández, M.
AU - Te Velthuis, S. G E
AU - Hoffmann, A.
AU - Visani, C.
AU - Garcia-Barriocanal, J.
AU - Peña, V.
AU - Arias, D.
AU - Sefrioui, Z.
AU - Leon, C.
AU - Santamaría, J.
PY - 2008/9/19
Y1 - 2008/9/19
N2 - We studied ferromagnet/superconductor/ferromagnet trilayers based on La0.7 Ca0.3 MnO3 manganite and YBa2 Cu3 O7-δ (YBCO) high- Tc 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.
AB - We studied ferromagnet/superconductor/ferromagnet trilayers based on La0.7 Ca0.3 MnO3 manganite and YBa2 Cu3 O7-δ (YBCO) high- Tc 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.
UR - https://www.scopus.com/pages/publications/52949150836
UR - https://www.scopus.com/pages/publications/52949150836#tab=citedBy
U2 - 10.1103/PhysRevB.78.094515
DO - 10.1103/PhysRevB.78.094515
M3 - Article
AN - SCOPUS:52949150836
SN - 1098-0121
VL - 78
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 9
M1 - 094515
ER -