Fig. 1: Bulk crystal, structural, and optical characterizations of slow-quenching Lu:Hf0.6Zr0.4O2. | Nature Communications

Fig. 1: Bulk crystal, structural, and optical characterizations of slow-quenching Lu:Hf0.6Zr0.4O2.

From: Unlocking the phase evolution of the hidden non-polar to ferroelectric transition in HfO2-based bulk crystals

Fig. 1

a Schematic diagram of the eutectoid reaction existing in the temperature-dependent phase diagram of Lu doped HfO2. The symbols of m, c, and t correspond to the monoclinic, cubic, and tetragonal phases, respectively. b Photograph of the as-grown Lu:Hf0.6Zr0.4O2 (9.25 at.%) crystal with a dimension of φ3 × 60 mm3. c Room-temperature XRD data of the Lu:Hf0.6Zr0.4O2 crystals with different Lu doping concentrations. The light blue shaded regions (at 38.7°, 53.5°, and 55.7°) represent the diffraction peaks observed in the o phase that are not present in the t phase. d Room-temperature Raman spectra of the Lu:Hf0.6Zr0.4O2 crystals. The shaded regions correspond to the characteristic peaks of t (273 cm−1) and o-AFE (367 cm−1) phases, respectively. e Intensity ratio (I273/I367) between the Raman peaks at 273 cm−1 (for the t phase) and 367 cm−1 (for the o-AFE phase) for different Lu:Hf0.6Zr0.4O2 crystals.

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