Exchange biasing and magnetoresistance (MR) behaviors have been investigated in La0.67Ca0.33MnO3/La0.5Ca 0.5MnO3 bilayers with specially designed interfacial structures. The exchange coupling is found to be strongly related to interfacial structures. Exchange field HE decreases as the cooling field Hfc increases at high Hfc region. Especially, the coercivity HC is enhanced by exchange coupling for bilayers with rough interface, while it is reduced for relatively smooth interface. Also, large low-field MR has been achieved by introducing regular in-plane grain boundaries, and a biasing of R-H loop has been observed.
|Original language||English (US)|
|Number of pages||5|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - Apr 1 2000|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics