Domain Structure Analyses of Tetragonal BaTiO<sub>3</sub> Single Crystal by Scanning Second-Harmonic Generation Microscopy: Birefringence Effect on Second-Harmonic Generation Polarization Diagram

Kaneshiro, Junichi; Uesu, Yoshiaki

doi:10.1143/jjap.50.09ne11

Cited by 8 publications

(5 citation statements)

References 30 publications

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“…In contrast to single crystalline substrates, where domain sizes can span multiple micrometers, we found domain sizes in the order of one micrometer or below. [ 25 ] Further, one finds mainly two dominant crystal orientations as indicated by the identical colors. Opposite orientations are indistinguishable.…”

Section: Bto Thin Film Characterizationmentioning

confidence: 98%

“…To find the domain distribution as shown in Figure 6, we analyzed the polarization dependence of second harmonic generation (SHG) in BTO by a fully-automated homemade nonlinear microscope system described elsewhere. [25,26] The experimental setup involved focusing a polarized tunable Ti:Sapphire laser onto the thin-film, while imaging the emitted SHG signal using a 20x objective. By rotating the polarizer, a series of images was acquired, and subsequently overlapped to create a composite image of the illuminated spot.…”

Section: Domain Orientationmentioning

confidence: 99%

See 1 more Smart Citation

PLD Epitaxial Thin‐Film BaTiO₃ on MgO − Dielectric and Electro‐Optic Properties

Winiger,

Keller,

Moor

et al. 2023

Adv Materials Inter

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The study demonstrates high‐quality pulsed‐laser‐deposited (PLD) barium titanate (BTO) thin‐films on a magnesium oxide substrate. The frequency response of the relative permittivity (dielectric constant) and the linear electro‐optical coefficient (Pockels coefficient) are measured. At 0.2 GHz, the Pockels coefficient is fitted to be r42 ≈ 1030 pm V−1. It decreases to ≈390 pm V−1 at 10 GHz after which it remains constant up to 70 GHz. The unbiased BTO permittivity is measured to be εa ≈ 7600 at 0.2 GHz, dropping to ≈1100 at 67 GHz, while the biased BTO had a permittivity εa ≈ 2000 at 0.2 GHz, dropping to ≈500 at 67 GHz. These results fill an important experimental characterization gap for high‐speed BTO applications and show the high quality of PLD‐grown BTO films. Lastly, the material's crystalline quality is characterized and the domain distribution is imaged. The findings enable the design and fabrication of a new generation of BTO‐based components for sensing and communications.

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Section: Bto Thin Film Characterizationmentioning

confidence: 98%

Section: Domain Orientationmentioning

confidence: 99%

PLD Epitaxial Thin‐Film BaTiO₃ on MgO − Dielectric and Electro‐Optic Properties

Winiger,

Keller,

Moor

et al. 2023

Adv Materials Inter

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“…Figure a shows a schematic of the top view of a - and c -domains . Apart from that, there is a possibility of the formation of subdomains with 90° in-plane polarization alignment inside the a -domain, which can be defined as a 1 - and a 2 -domains (Figure b). ,, Such domain structure is expected to stabilize only in thin films under specific epitaxial strain. ,− Unlike a - and c -domains, the direction of the polarization in these subdomain structures cannot be distinguished from the atomic force microscopy (AFM), optical topographic images.…”

Section: Introductionmentioning

confidence: 99%

Optical Control of In-Plane Domain Configuration and Domain Wall Motion in Ferroelectric and Ferroelastic Materials

Dwij,

De,

Kunwar

et al. 2024

ACS Appl. Mater. Interfaces

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The sensitivity of ferroelectric domain walls to external stimuli makes them functional entities in nanoelectronic devices. Specifically, optically driven domain reconfiguration with in-plane polarization is advantageous and thus is highly sought. Here, we show the existence of in-plane polarized subdomains imitating a single domain state and reversible optical control of its domain wall movement in a single-crystal of ferroelectric BaTiO 3 . Similar optical control in the domain configuration of nonpolar ferroelastic material indicates that long-range ferroelectric polarization is not essential for the optical control of domain wall movement. Instead, flexoelectricity is found to be an essential ingredient for the optical control of the domain configuration, and hence, ferroelastic materials would be another possible candidate for nanoelectronic device applications.

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“…The mostly used SHG technology to verify the symmetry of a sample is the SHG anisotropy pattern, which is also called SHG polarization diagram. Previous researches have mainly related its variation to structural changing and even determined domain structures and symmetries of samples by mapping their SHG anisotropy patterns 3 , 4 , 11 . A set of papers from the group of Venkatraman Gopalan have used SHG to reveal the domain variety of perovskite ferroelectrics and their nonlinear properties 2 , 9 , 12 , 13 .…”

Section: Introductionmentioning

confidence: 99%

Direct evidence of correlation between the second harmonic generation anisotropy patterns and the polarization orientation of perovskite ferroelectric

Wang

Jin

et al. 2017

Sci Rep

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For ferroelectric materials, where the polar state breaks the inversion symmetry, second harmonic generation is a useful tool to prove their ferroelectric properties. However, the correlation between the anisotropy patterns and the polarization orientation of the ferroelectric domains has not been clarified yet. In this work, we systematically investigated this correlation in a typical perovskite oxide ferroelectric, Barium Titanate (BaTiO3) crystal, by second harmonic generation and the piezoresponse force microscopy technique. The evolution of polarization-dependent anisotropy patterns proves that there is a linear relationship between the rotation angle of second harmonic generation anisotropy patterns and the polarization angle of BaTiO3 single crystals. It is a direct evidence illustrating that the polarization of BaTiO3 crystal can be qualitatively identified in 0°–180° by second harmonic generation technology. This work gives a glance at improving a nonintrusive and convenient method to identify the polarization of perovskite ferroelectric materials.

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Domain Structure Analyses of Tetragonal BaTiO₃ Single Crystal by Scanning Second-Harmonic Generation Microscopy: Birefringence Effect on Second-Harmonic Generation Polarization Diagram

Cited by 8 publications

References 30 publications

PLD Epitaxial Thin‐Film BaTiO₃ on MgO − Dielectric and Electro‐Optic Properties

PLD Epitaxial Thin‐Film BaTiO₃ on MgO − Dielectric and Electro‐Optic Properties

Optical Control of In-Plane Domain Configuration and Domain Wall Motion in Ferroelectric and Ferroelastic Materials

Direct evidence of correlation between the second harmonic generation anisotropy patterns and the polarization orientation of perovskite ferroelectric

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Domain Structure Analyses of Tetragonal BaTiO3 Single Crystal by Scanning Second-Harmonic Generation Microscopy: Birefringence Effect on Second-Harmonic Generation Polarization Diagram

Cited by 8 publications

References 30 publications

PLD Epitaxial Thin‐Film BaTiO3 on MgO − Dielectric and Electro‐Optic Properties

PLD Epitaxial Thin‐Film BaTiO3 on MgO − Dielectric and Electro‐Optic Properties

Optical Control of In-Plane Domain Configuration and Domain Wall Motion in Ferroelectric and Ferroelastic Materials

Direct evidence of correlation between the second harmonic generation anisotropy patterns and the polarization orientation of perovskite ferroelectric

Contact Info

Product

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Domain Structure Analyses of Tetragonal BaTiO₃ Single Crystal by Scanning Second-Harmonic Generation Microscopy: Birefringence Effect on Second-Harmonic Generation Polarization Diagram

PLD Epitaxial Thin‐Film BaTiO₃ on MgO − Dielectric and Electro‐Optic Properties

PLD Epitaxial Thin‐Film BaTiO₃ on MgO − Dielectric and Electro‐Optic Properties