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Comment on "Giant Electromechanical Coupling of Relaxor Ferroelectrics Controlled by Polar Nanoregion Vibrations"

Published

Author(s)

Peter M. Gehring, Zhijun NMN Xu, C. Stock, Guangyong NMN Xu, Daniel E Parshall, Leland Weldon Harriger, C. A. Gehring, Xiaobing Li, Haosu Luo

Abstract

Manley et al. (Science Advances, 16 September 2016, p.e1501814) report a splitting of a transverse acoustic phonon branch below Tc in the relaxor ferroelectric Pb[(Mg1/3Nb2/3)1-xTix]O3 with x=0.30 using neutron scattering methods. They argue that this occurs because these phonons hybridize with local, harmonic lattice vibrations associated with polar nanoregions. We show that this splitting vanishes when the measurement is made using a different neutron wavelength. It is therefore spurious.
Citation
Science Advances
Volume
5
Issue
3

Keywords

Relaxors, PMN-xPT, Ferroelectricity, Piezoelectricity, Phonons, Neutron Scattering

Citation

, P. , , Z. , Stock, C. , , G. , , D. , , L. , , C. , Li, X. and Luo, H. (2019), Comment on "Giant Electromechanical Coupling of Relaxor Ferroelectrics Controlled by Polar Nanoregion Vibrations", Science Advances, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=924853 (Accessed June 13, 2021)
Created March 22, 2019, Updated October 2, 2019