Gm. Roesler et al., MAGNETIZATION-RELATED TRANSPORT ANOMALIES IN METAL FERROMAGNETIC INSULATOR HETEROSTRUCTURES, Journal of applied physics, 76(10), 1994, pp. 6437-6439
Magnetoresistance measurements have been performed on epitaxial, metal
/ferromagnetic insulator bilayers. They are more sensitive to magnetic
behavior at the interface of such structures than magnetization measu
rements. It is clear from the magnetoresistance data that previously r
eported slope discontinuities in the resistance versus temperature of
such heterostructures are magnetic in origin. These studies demonstrat
e that the conduction electrons of the metal are coupled to the spins
in the magnetic insulator, and act as probes of the magnetic state at,
the interface between the two materials. An example of the usefulness
of this probe is shown by magnetoresistance measurements on a Ag/EuO b
ilayer.