TY - GEN
T1 - Large magnetoresistance in oxide based ferromagnet / superconductor spin switches
AU - Peña, V.
AU - Nemes, N.
AU - Visani, C.
AU - Garcia-Barriocanal, J.
AU - Bruno, F.
AU - Arias, D.
AU - Sefrioui, Z.
AU - Leon, C.
AU - Te Velthuis, S. G E
AU - Hoffmann, A.
AU - Garcia-Hernandez, M.
AU - Santamaría, J.
PY - 2006
Y1 - 2006
N2 - We report large magnetoresistance (in excess of 1000%) in ferromagnet / superconductor / ferromagnet structures made of La0.7Ca 0.3MnO3 and YBa2Cu3O7 in the current in plane (CIP) geometry. This magnetoresistance has many of the ingredients of the giant magnetoresistance of metallic superlattices: it is independent on the angle between current and magnetic field, depends on the relative orientation of the magnetization in the ferromagnetic layers, and takes very large values. The origin is enhanced scattering at the F/S interface in the anti parallel configuration of the magnetizations. Furthermore, we examine the dependence of the magnetoresistance effect on the thickness of the superconducting layer, and show that the magnetoresistance dies out for thickness in excess of 30 nm, setting a length scale for the diffusion of spin polarized quasiparticles.
AB - We report large magnetoresistance (in excess of 1000%) in ferromagnet / superconductor / ferromagnet structures made of La0.7Ca 0.3MnO3 and YBa2Cu3O7 in the current in plane (CIP) geometry. This magnetoresistance has many of the ingredients of the giant magnetoresistance of metallic superlattices: it is independent on the angle between current and magnetic field, depends on the relative orientation of the magnetization in the ferromagnetic layers, and takes very large values. The origin is enhanced scattering at the F/S interface in the anti parallel configuration of the magnetizations. Furthermore, we examine the dependence of the magnetoresistance effect on the thickness of the superconducting layer, and show that the magnetoresistance dies out for thickness in excess of 30 nm, setting a length scale for the diffusion of spin polarized quasiparticles.
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M3 - Conference contribution
AN - SCOPUS:33646192260
SN - 1558998411
SN - 9781558998414
T3 - Materials Research Society Symposium Proceedings
SP - 95
EP - 102
BT - Degradation Processes in Nanostructured Materials
PB - Materials Research Society
T2 - 2005 Materials Research Society Fall Meeting
Y2 - 28 November 2005 through 2 December 2005
ER -