Ferroelectric and optical properties of single crystal BaZnF4

Vı́llora, Encarnación G.; Shimamura, Kiyoshi; Jing, Fangli; Medvedev, Andrey; Takekawa, Shunji; Kitamura, Kenji

doi:10.1063/1.2737365

Cited by 16 publications

(8 citation statements)

References 11 publications

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“…P-E data obtained at room temperature under an applied field of 100 kV cm −1 at 1 kHz showed a linear dielectric response and no evidence of ferroelectric switching (see ESI †). The coercive field for isostructural BaMgF 4 is known to increase dramatically with frequency, 19,20 suggesting a high nucleation energy for switching. In order to investigate this, measurements were repeated at lower frequencies (down to 0.1 Hz).…”

Section: Electrical Propertiesmentioning

confidence: 99%

Structural and dielectric studies of the phase behaviour of the topological ferroelectric La_1−xNd_xTaO₄

et al. 2015

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The layered perovskite LaTaO(4) has been prepared in its polar orthorhombic polymorphic form at ambient temperature. Although no structural phase transition is observed in the temperature interval 25° C < T < 500 °C, a very large axial thermal contraction effect is seen, which can be ascribed to an anomalous buckling of the perovskite octahedral layer. The non-polar monoclinic polymorph can be stabilised at ambient temperature by Nd-doping. A composition La(0.90)Nd(0.10)TaO(4) shows a first-order monoclinic-orthorhombic (non-polar to polar) transition in the region 250° C < T < 350 °C. Dielectric responses are observed at both the above structural events but, despite the 'topological ferroelectric' nature of orthorhombic LaTaO(4), we have not succeeded in obtaining ferroelectric P-E hysteresis behaviour. Structural relationships in the wider family of A(n)B(n)X(3n+2) layered perovskites are discussed.

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Section: Electrical Propertiesmentioning

confidence: 99%

Structural and dielectric studies of the phase behaviour of the topological ferroelectric La_1−xNd_xTaO₄

et al. 2015

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“…All the BaMF 4 compounds are piezoelectric at ambient conditions. Owing to their higher transparency when compared with oxides, these fluorides can be used as optical materials (Villora et al, 2007;Zeng et al, 2007;Kannan et al, 2008). The extrapolated transition temperatures to a hypothetic paraelectric phase were estimated to lie above the melting points (Didomenico et al, 1969).…”

Section: Introductionmentioning

confidence: 99%

Ternary fluorides BaMF₄ (M = Zn, Mg and Mn) at low temperatures

Posse¹,

Grzechnik²,

Friese³

2009

Acta Crystallogr Sect B

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Ternary fluorides BaMF4 (M = Zn, Mg, Mn) have been studied in the temperature range from 300 to 10 K using synchrotron and laboratory powder and single-crystal diffraction. The first two compounds are stable down to 10 K, while the third one undergoes a phase transition to an incommensurately modulated structure at approximately 250 K. The modulated phase is stable down to 10 K. The magnetic anomalies at 45 and 27 K observed previously in BaMnF4 are exclusively reflected in the behavior of the gamma component of the q vector, which assumes an irrational value of approximately 0.395 A(-1) at the temperature corresponding to the onset of the magnetic ordering and then stays constant down to 10 K. Mn-Mn distances do not indicate any structural response to the magnetic ordering. The formation of the modulated phase can be explained on the basis of simple geometrical criteria. The incorporation of the large Mn cation in the octahedral sheets implies an increase of the cavity in which the Ba ion is incorporated. This leads to the formation of the modulated structure to adapt the coordination sphere around Ba in such a way that the bond-valence sums can be kept close to the ideal value of two. With further lowering of the temperature, the charge balance around the Ba ion requires an increasingly anharmonic character of the modulation function of Ba, until finally at 10 K a crenel-like shape is assumed for the modulation of this atom.

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“…11 BMF is a nonlinear crystal which exhibits an extraordinary transparency range extending from the deep ultraviolet (UV) (126 nm) to the midinfrared (IR) (13 μm). 12,13 This offers an exceptional advantage for optical devices operating in the UV and mid-IR, where other nonlinear materials cannot be used. Regarding its photonic applications, quasiphase-matched frequency conversion processes in both visible and UV spectral region have been recently reported in periodically poled BMF crystals being the shortest converted wavelength obtained in the UV at 368 nm.…”

Section: Introductionmentioning

confidence: 99%

“…Pure (undoped) BMF crystals were first grown back in the 1970s by both Bridgman and Czochralski techniques, and the main optical, elastic, and electric properties of BMF were reported. 12,16,17 The crystal structure consists of distorted MgF 6 octahedra sharing corners to form puckered sheets parallel to (010) plane. These are linked by Ba 2+ ions.…”

Section: Introductionmentioning

confidence: 99%

Local environment of optically active Nd3+ions in the ultratransparent BaMgF4ferroelectric crystal

et al. 2012

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A comprehensive study of the site location of Nd 3+ ions in the BaMgF 4 ultratransparent ferroelectric crystal is presented. By combining different low-temperature optical spectroscopies and electron paramagnetic resonance, the crystal field energy levels of Nd 3+ ions and the gyromagnetic factors are experimentally determined. These results are employed to perform the crystal field analysis of Nd 3+ ions considering a Cs point symmetry. The crystal field calculation yields a small root-mean-square deviation of 18 cm −1 and reveals a large crystal field strength (621 cm −1 ), verifying the assignment of the Ba 2+ cationic site as the location for Nd 3+ ions in this fluoride host. The results suggest a slight displacement of Nd 3+ from the barium regular site with a rearrangement of the fluorine ions around it. The work gives a deep insight into the properties of the Nd 3+ -doped BaMgF 4 crystal, a ferroelectric widely ultra-transparent material with potential applications as optical device operating in the Vacuum Ultraviolet-Ultraviolet and midinfrared spectral regions.

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Ferroelectric and optical properties of single crystal BaZnF4

Abstract: Articles you may be interested inElectrical properties of BaTiO3 based -MFIS heterostructure: Role of semiconductor channel carrier concentration AIP Advances 4, 057131 (2014); 10.1063/1.4880496 Ferroelectric properties of ruthenium-doped lead zinc niobate-lead titanate single crystal

Cited by 16 publications

References 11 publications

Structural and dielectric studies of the phase behaviour of the topological ferroelectric La_1−xNd_xTaO₄

Structural and dielectric studies of the phase behaviour of the topological ferroelectric La_1−xNd_xTaO₄

Ternary fluorides BaMF₄ (M = Zn, Mg and Mn) at low temperatures

Local environment of optically active Nd3+ions in the ultratransparent BaMgF4ferroelectric crystal

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Ferroelectric and optical properties of single crystal BaZnF4

Abstract: Articles you may be interested inElectrical properties of BaTiO3 based -MFIS heterostructure: Role of semiconductor channel carrier concentration AIP Advances 4, 057131 (2014); 10.1063/1.4880496 Ferroelectric properties of ruthenium-doped lead zinc niobate-lead titanate single crystal

Cited by 16 publications

References 11 publications

Structural and dielectric studies of the phase behaviour of the topological ferroelectric La1−xNdxTaO4

Structural and dielectric studies of the phase behaviour of the topological ferroelectric La1−xNdxTaO4

Ternary fluorides BaMF4 (M = Zn, Mg and Mn) at low temperatures

Local environment of optically active Nd3+ions in the ultratransparent BaMgF4ferroelectric crystal

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Structural and dielectric studies of the phase behaviour of the topological ferroelectric La_1−xNd_xTaO₄

Structural and dielectric studies of the phase behaviour of the topological ferroelectric La_1−xNd_xTaO₄

Ternary fluorides BaMF₄ (M = Zn, Mg and Mn) at low temperatures