Nature of the well screened state in hard X-ray Mn 2p core-level photoemission measurements of La1-xSrxMnO3 films.
Using hard x-ray (HX; hnu=5.95 keV) synchrotron photoemission spectroscopy (PES), we study the intrinsic electronic structure of La(1-x)Sr(x)MnO(3) (LSMO) thin films. Comparison of Mn 2p core-levels with soft x-ray (SX; hnu approximately 1000 eV) PES shows a clear additional well-screened feature only in HX PES. Takeoff-angle dependent data indicate its bulk (> or =20 A) character. The doping and temperature dependence track the ferromagnetism and metallicity of the LSMO series. Cluster model calculations including charge transfer from doping-induced states show good agreement, confirming this picture of bulk properties reflected in Mn 2p core-levels using HX PES.
Horiba
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K
Soft X-Ray Spectroscopy Laboratory, RIKEN/SPring-8, Mikazuki-cho, Hyogo 679-5148, Japan. horiba@spring8.or.jp
Taguchi
M
M
Chainani
A
A
Takata
Y
Y
Ikenaga
E
E
Miwa
D
D
Nishino
Y
Y
Tamasaku
K
K
Awaji
M
M
Takeuchi
A
A
Yabashi
M
M
Namatame
H
H
Taniguchi
M
M
Kumigashira
H
H
Oshima
M
M
Lippmaa
M
M
Kawasaki
M
M
Koinuma
H
H
Kobayashi
K
K
Ishikawa
T
T
Shin
S
S