D. Nuzhnyy, P. Vanĕk, J. Petzelt, V. Bovtun, M. Kempa, I. Gregora, M. Savinov, R. Krupková, V. Studnička, M. Samoylovich, A. Rinkevich, A. Belyanin, S. М. Klescheva
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Properties of BaTiO3 confined in opal matrices — lattice packings of nanospheres silica dioxide
Using the sol-gel technique, BaTiO3 was embedded in opal matrices that are the lattice packings of silica dioxide nanospheres for the first time. The room-temperature IR and Raman spectra clearly show characteristic vibrational modes of the ferroelectrically distorted TiO6 octahedra without any long-range order. Raman spectra bring evidence of a diffuse ferroelectric phase transition in the opal-BaTiO3 composite.
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