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Title: Raman study of the soft mode in ferroelectric PbDPO 4
Authors: Lockwood, D.J.
Ohno, N.
Kuok, M.H. 
Arend, H.
Issue Date: 20-Apr-1986
Citation: Lockwood, D.J., Ohno, N., Kuok, M.H., Arend, H. (1986-04-20). Raman study of the soft mode in ferroelectric PbDPO 4. Journal of Physics C: Solid State Physics 19 (11) : L233-L237. ScholarBank@NUS Repository.
Abstract: The low-frequency Raman spectrum of PbDPO 4 has been studied as a function of temperature between 10 and 484K (T C ≃450K). A soft mode was observed whose frequency exhibits a weak temperature dependence (from 79.5 cm -1 at 10K to about 67 cm -1 at TC). Comparison with results from earlier measurements of the equivalent mode in PbHPO 4 shows that it cannot be the tunnelling mode predicted by theory. The authors conclude that the soft mode does not drive the ferroelectric transition in either PbHPO 4 or PbDPO 4. © 1986 The Institute of Physics.
Source Title: Journal of Physics C: Solid State Physics
ISSN: 00223719
Appears in Collections:Staff Publications

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