TY - JOUR
T1 - Giant magnetoresistance in ferromagnet/superconductor superlattices
AU - Peña, V.
AU - Sefrioui, Z.
AU - Arias, D.
AU - Leon, C.
AU - Santamaria, J.
AU - Martinez, J. L.
AU - Te Velthuis, S. G.E.
AU - Hoffmann, A.
PY - 2005/2/11
Y1 - 2005/2/11
N2 - We show magnetoresistance in excess of 1000% in trilayers containing highly spin-polarized La0.7Ca0.3MnO3 and high-T c superconducting YBa2Cu3O7. This large magnetoresistance is reminiscent of the giant magnetoresistance (GMR) in metallic superlattices but with much larger values, and originates at spin imbalance due to the injection of spin-polarized carriers. Furthermore, in contrast to ordinary GMR, the magnetoresistance is intimately related to the superconductivity in the YBa2Cu3O7 layer and vanishes in the normal state. This result, aside from its fundamental importance, may be of interest for the design of novel spintronic devices based on ferromagnet/superconductor structures.
AB - We show magnetoresistance in excess of 1000% in trilayers containing highly spin-polarized La0.7Ca0.3MnO3 and high-T c superconducting YBa2Cu3O7. This large magnetoresistance is reminiscent of the giant magnetoresistance (GMR) in metallic superlattices but with much larger values, and originates at spin imbalance due to the injection of spin-polarized carriers. Furthermore, in contrast to ordinary GMR, the magnetoresistance is intimately related to the superconductivity in the YBa2Cu3O7 layer and vanishes in the normal state. This result, aside from its fundamental importance, may be of interest for the design of novel spintronic devices based on ferromagnet/superconductor structures.
UR - http://www.scopus.com/inward/record.url?scp=18144380298&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=18144380298&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.94.057002
DO - 10.1103/PhysRevLett.94.057002
M3 - Article
C2 - 15783679
AN - SCOPUS:18144380298
VL - 94
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 5
M1 - 057002
ER -