TY - JOUR
T1 - Discrimination between photodoping- and heat-induced magnetization changes in Nd0.52Sr0.48MnO3 using a heterostructure with SrTiO3
AU - Yada, Hiroyuki
AU - Matsubara, Masakazu
AU - Matsuzaki, Hiroyuki
AU - Yamada, Hiroyuki
AU - Sawa, Akihito
AU - Okamoto, Hiroshi
PY - 2011/7/12
Y1 - 2011/7/12
N2 - Photodoping-induced magnetization changes in perovskite-type Nd 0.52Sr0.48MnO3 (NSMO) film and a NSMO/SrTiO3 (STO) heterostructure were investigated by probing time-resolved magneto-optical Kerr effects. The NSMO film exhibited a photoinduced magnetization increase in several tens of picoseconds due to the thermal effect after rapid (<200 fs) photocarrier recombination. The heterostructure, by contrast, produced a magnetization increase in 200 fs due to both rapid injection of photogenerated holes from the STO layer to the NSMO layer and the delay in recombination of electrons and holes separated in the two layers. The heterostructure is a useful system for exploring photodoping-induced phenomena in correlated electron oxides since it enables discrimination between photodoping- and heat-induced effects.
AB - Photodoping-induced magnetization changes in perovskite-type Nd 0.52Sr0.48MnO3 (NSMO) film and a NSMO/SrTiO3 (STO) heterostructure were investigated by probing time-resolved magneto-optical Kerr effects. The NSMO film exhibited a photoinduced magnetization increase in several tens of picoseconds due to the thermal effect after rapid (<200 fs) photocarrier recombination. The heterostructure, by contrast, produced a magnetization increase in 200 fs due to both rapid injection of photogenerated holes from the STO layer to the NSMO layer and the delay in recombination of electrons and holes separated in the two layers. The heterostructure is a useful system for exploring photodoping-induced phenomena in correlated electron oxides since it enables discrimination between photodoping- and heat-induced effects.
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U2 - 10.1103/PhysRevB.84.045114
DO - 10.1103/PhysRevB.84.045114
M3 - Article
AN - SCOPUS:79961239779
SN - 1098-0121
VL - 84
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 4
M1 - 045114
ER -