  The list of materials systems displaying both electric and magnetic long
range order is short. Oxides, however, concentrate numerous examples of
multiferroicity with, in some cases, a large magnetoelectric coupling. As a
result, a fruitful research field has emerged contemporaneously with the
consolidation of spintronic. The synergy between multiferroics and spintronics
was meant to be inevitable and hence the characterization of spintronic
functionalities in multiferroic materials is rather abundant. The aim of the
present chapter is to review the oxide heterostructures where magnetoelectric
coupling is demonstrated by means of spintronic functionalities (i.e.
magnetoresistance, anisotropic magnetoresistance, giant magnetoresistance or
tunnel magnetoresistance).
