We investigated photocontrol of magnetization in oxide heterostructures consisting of a perovskite manganite La0.9Sr0.1MnO 3 and a titanate SrTiO3 (STO) by time-resolved magneto-optical Kerr effect measurements. On photoexcitation of STO, the magnetization of the manganite increases within 0.2 ps and persists for ∼500 ps. This ultrafast magnetization is ascribed to rapid hole injection from STO into the manganite due to strong band bending of STO near the interface, while the long lifetime of the magnetization is attributed to a delay in electron injection to the manganite layer. The photocarrier dynamics across the interface is discussed in detail.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2011 Apr 11|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics