TY - JOUR
T1 - X-ray absorption magnetic circular dichroism of (La,Ce) MnO3 thin films
AU - Yanagida, Takeshi
AU - Saitoh, Yuji
AU - Takeda, Yukiharu
AU - Fujimori, Atsushi
AU - Tanaka, Hidekazu
AU - Kawai, Tomoji
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2009/4/1
Y1 - 2009/4/1
N2 - Creating a bipolarity of semiconductors has been a key technology to develop recent advanced semiconductor devices. Such bipolarity for manganese oxides, of which "hole-doped manganites" exhibit a rich variety of electric transport and magnetic properties, has been of great importance. Although theoretical calculation predicts the presence of ferromagnetic "electron-doped manganites" with doping tetravalent cations, the ferromagnetic origin in experiments has been controversial due to the lack of direct experimental evidence. Here, we investigate the ferromagnetism in (La,Ce) MnO3 thin films by measuring the magnetic circular dichroism in soft x-ray absorption (XMCD). Despite the presence of Mn2+, i.e., electron doping for manganese, the Mn2+ amount did not correlate with the Curie temperature, indicating the minor magnetic contribution of Mn2+. More crucially XMCD measurements clarified that the ferromagnetism is not caused by the presence of Mn2+ but by self-hole doping for manganese.
AB - Creating a bipolarity of semiconductors has been a key technology to develop recent advanced semiconductor devices. Such bipolarity for manganese oxides, of which "hole-doped manganites" exhibit a rich variety of electric transport and magnetic properties, has been of great importance. Although theoretical calculation predicts the presence of ferromagnetic "electron-doped manganites" with doping tetravalent cations, the ferromagnetic origin in experiments has been controversial due to the lack of direct experimental evidence. Here, we investigate the ferromagnetism in (La,Ce) MnO3 thin films by measuring the magnetic circular dichroism in soft x-ray absorption (XMCD). Despite the presence of Mn2+, i.e., electron doping for manganese, the Mn2+ amount did not correlate with the Curie temperature, indicating the minor magnetic contribution of Mn2+. More crucially XMCD measurements clarified that the ferromagnetism is not caused by the presence of Mn2+ but by self-hole doping for manganese.
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U2 - 10.1103/PhysRevB.79.132405
DO - 10.1103/PhysRevB.79.132405
M3 - Article
AN - SCOPUS:66049143484
VL - 79
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 1098-0121
IS - 13
M1 - 132405
ER -