We have investigated the exchange bias in CVD grown epitaxial CrO2/Cr2O3 bilayer thin
films using hysteresis loops and resonant RF transverse susceptibility. M-H loops indicated an
enhanced coercivity without appreciable loop shift and the transverse susceptibility in CrO2/Cr2O3
bilayers revealed features associated with both the ferromagnetic and antiferromagnetic phases. In
addition, TS yielded large anisotropy constant (Keff) values depending on the fraction of Cr2O3
present. The large anisotropy fields observed cannot be accounted for by the variable thickness of
CrO2 alone and are indicative of possible exchange coupling between CrO2 and Cr2O3 phases that
significantly affects the effective magnetic anisotropy.
Formation mechanism of Ruddlesden-Popper-type antiphase boundaries during the kinetically limited growth of Sr rich SrTiO3 thin films
