TY - JOUR
T1 - Ultrafast control of magnetization by photocarrier injection in La 0.9Sr0.1MnO3/SrTiO3 heterostructures
AU - Yada, Hiroyuki
AU - Matsubara, Masakazu
AU - Yamada, Hiroyuki
AU - Sawa, Akihito
AU - Matsuzaki, Hiroyuki
AU - Okamoto, Hiroshi
PY - 2011/4/11
Y1 - 2011/4/11
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.83.165408
DO - 10.1103/PhysRevB.83.165408
M3 - Article
AN - SCOPUS:79961114338
SN - 0163-1829
VL - 83
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 16
M1 - 165408
ER -