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@ARTICLE{Chaturvedi:172563,
author = {Chaturvedi, Smita and Sarkar, Indranil and Shirolkar,
Mandar M. and Jeng, U-Ser and Yeh, Yi-Qi and Rajendra,
Ranguwar and Ballav, Nirmalya and Kulkarni, Sulabha},
title = {{P}robing bismuth ferrite nanoparticles by hard {X}-ray
photoemission: {A}nomalous occurrence of metallic bismuth},
journal = {Applied physics letters},
volume = {105},
number = {10},
issn = {1077-3118},
address = {Melville, NY},
publisher = {American Institute of Physics},
reportid = {PUBDB-2014-03799},
pages = {102910},
year = {2014},
note = {OA},
abstract = {We have investigated bismuth ferrite nanoparticles
(∼75 nm and ∼155 nm) synthesized by a chemical
method, using soft X-ray (1253.6 eV) and hard X-ray (3500,
5500, and 7500 eV) photoelectron spectroscopy. This
provided an evidence for the variation of chemical state of
bismuth in crystalline, phase pure nanoparticles. X-ray
photoelectron spectroscopy analysis using Mg Kα
(1253.6 eV) source showed that iron and bismuth were
present in both Fe3+ and Bi3+ valence states as expected for
bismuth ferrite. However, hard X-ray photoelectron
spectroscopy analysis of the bismuth ferrite nanoparticles
using variable photon energies unexpectedly showed the
presence of Bi0 valence state below the surface region,
indicating that bismuth ferrite nanoparticles are chemically
inhomogeneous in the radial direction. Consistently,
small-angle X-ray scattering reveals a core-shell structure
for these radial inhomogeneous nanoparticles.},
cin = {FS-PEX},
ddc = {530},
cid = {I:(DE-H253)FS-PEX-20130206},
pnm = {PETRA Beamline P09 (POF2-54G14) / INDIA-DESY - INDIA-DESY
Collaboration $(2020_Join2-INDIA-DESY)$},
pid = {G:(DE-H253)POF2-P09-20130405 /
$G:(DE-HGF)2020_Join2-INDIA-DESY$},
experiment = {EXP:(DE-H253)P-P09-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000342758700057},
doi = {10.1063/1.4895672},
url = {https://bib-pubdb1.desy.de/record/172563},
}