[18] Thin film growth and magnetic anisotropy of epitaxial Sr_0.775Y_0.225CoO_3-delta

Epitaxially oriented (100) and (111) Sr_0.775Y_0.225CoO_3−δ thin films were grown on single crystal (100) and (111) SrTiO₃ substrates by the pulsed laser deposition method. We observed the relatively small strain and the ferromagnetism with the relatively large grains in the epitaxial (111)Sr_0.775Y_0.225CoO_3−δ thin film at room temperature. However, the epitaxial (100) Sr_0.775Y_0.225CoO_3−δ thin film showed the relatively high strain along the in-plane orientation and the superparamagnetic property with the relative small grains.