TY - JOUR
T1 - Enhancement of dielectric constant of BaTiO3 nanoparticles studied by resonant x-ray emission spectroscopy
AU - Nakajima, Nobuo
AU - Oki, Megumi
AU - Isohama, Yoichi
AU - Maruyama, Hiroshi
AU - Tezuka, Yasuhisa
AU - Ishiji, Kotaro
AU - Iwazumi, Toshiaki
AU - Okada, Kozo
PY - 2012/12/28
Y1 - 2012/12/28
N2 - The nanoscopic origin of the enhancement of the dielectric constant of BaTiO3 nanoparticles was investigated by means of Ti Kβ resonant x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer excitations were observed, one of which disappeared as the particle size (d) was reduced, while the other remained unchanged. This is consistent with the fact that tetragonality was also reduced with decreasing d. The origin of the large enhancement in the dielectric constant is briefly discussed from a microscopic point of view.
AB - The nanoscopic origin of the enhancement of the dielectric constant of BaTiO3 nanoparticles was investigated by means of Ti Kβ resonant x-ray emission spectroscopy. Two inelastic peaks due to charge-transfer excitations were observed, one of which disappeared as the particle size (d) was reduced, while the other remained unchanged. This is consistent with the fact that tetragonality was also reduced with decreasing d. The origin of the large enhancement in the dielectric constant is briefly discussed from a microscopic point of view.
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U2 - 10.1103/PhysRevB.86.224114
DO - 10.1103/PhysRevB.86.224114
M3 - Article
AN - SCOPUS:84871810323
SN - 1098-0121
VL - 86
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 22
M1 - 224114
ER -