Discrimination between photodoping- and heat-induced magnetization changes in Nd0.52Sr0.48MnO3 using a heterostructure with SrTiO3

Hiroyuki Yada, Masakazu Matsubara, Hiroyuki Matsuzaki, Hiroyuki Yamada, Akihito Sawa, Hiroshi Okamoto

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number045114
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number4
DOIs
Publication statusPublished - 2011 Jul 12

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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