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Spectral changes across the phase transitions in KNN.
Temperature dependence of the Raman lines in KNN. Data in the , , , phases are shown as inverted red triangles, black circles, blue squares, and upright magenta triangles.
Comparison of the spectra in the three ferroelectric phases of KNN and KNLN.
Spectra in the lowest-temperature phases in KNLN.
Transition temperatures through the phase sequence in KNN. Columns (a) and (b) were measured while the temperature is rising and falling, respectively, and column (c) is historical data.
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