Crossed Andreev Reflection-Induced Magnetoresistance

Francesco Giazotto, Fabio Taddei, Fabio Beltram, Rosario Fazio
2006 Physical Review Letters  
We show that very large negative magnetoresistance can be obtained in magnetic trilayers in a current-in-plane geometry owing to the existence of crossed Andreev reflection. This spin-valve consists of a thin superconducting film sandwiched between two ferromagnetic layers whose magnetization is allowed to be either parallelly or antiparallelly aligned. For a suitable choice of structure parameters and nearly fully spin-polarized ferromagnets the magnetoresistance can exceed -80%. Our results
more » ... e relevant for the design and implementation of spintronic devices exploiting ferromagnet-superconductor structures.
doi:10.1103/physrevlett.97.087001 pmid:17026324 fatcat:6evkha4xbvhstoed4wgyldkhma