2020
DOI: 10.1002/admi.201901604
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Giant Uniaxial Strain Ferroelectric Domain Tuning in Freestanding PbTiO3 Films

Abstract: regenerated much attention to the search for phases that do not exist in the parent bulk materials. [1] Structures such as vortex pairs, super-tetragonal phase, and polar skyrmions have been experimentally reported. [2][3][4][5][6][7][8] In essence, the formation of ferroelectric domain structures strongly relies on the balance between electrostatic and elastic energies which is sensitively affected by film thickness, substrate mismatch strain, depolarization field, cooling rate, etc. [9][10][11][12][13] Previ… Show more

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Cited by 54 publications
(57 citation statements)
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“…In particular, the recently developed water-soluble pseudoperovskite Sr 3 Al 2 O 6 has become widely used as a sacrificial buffer layer in the fabrication of a variety of freestanding, crystalline oxide thin films [23][24][25][26][27][28] . These freestanding films, with millimeter-scale lateral dimensions and down to nanometer-scale thickness, can accommodate much larger strains than their bulk counterparts [29][30][31] . Here, we integrate the freestanding SrTiO 3 films onto a flexible polymer stretching platform to probe the strain-tunable ferroelectric transition in SrTiO 3 30 .…”
mentioning
confidence: 99%
“…In particular, the recently developed water-soluble pseudoperovskite Sr 3 Al 2 O 6 has become widely used as a sacrificial buffer layer in the fabrication of a variety of freestanding, crystalline oxide thin films [23][24][25][26][27][28] . These freestanding films, with millimeter-scale lateral dimensions and down to nanometer-scale thickness, can accommodate much larger strains than their bulk counterparts [29][30][31] . Here, we integrate the freestanding SrTiO 3 films onto a flexible polymer stretching platform to probe the strain-tunable ferroelectric transition in SrTiO 3 30 .…”
mentioning
confidence: 99%
“…[31][32][33][34] While strain is typically introduced by lattice mismatch with a substrate in epitaxial films, released films relax their lattice towards their bulk crystal structure; therefore, different approaches to manipulate properties are required. Mechanical and electric-field manipulation of micrometer-sized freestanding flakes in electron-microscopy experiments [35,36] and straining experiments on polymersupported ultrathin perovskite membranes (restricted to films <10 nm in thickness) [37,38] have demonstrated their exceptional flexibility. Whereas transfer to polymers or electroactive substrates has been exploited to tune magnetic properties, [38][39][40] test the resilience of ferroelectric properties, [41][42][43] or induce ferroelectricity in non-polar materials, [44] deterministic strain control of properties has not been demonstrated on single-crystal ferroelectric membranes.…”
mentioning
confidence: 99%
“…It is expected that on either side of the peak of the ripple, tensile strain will tend to rotate the polarization vectors toward an in‐plane orientation but opposite directions. [ 19,27 ] This can lead to the creation of domain walls separating areas with high and low effective vertical piezoresponse amplitude and phase shift. No crack is formed under such a high deformation, which is a signature of the superelastic nature of freestanding heterostructures and in line with recent reports on freestanding single layer complex oxides.…”
Section: Resultsmentioning
confidence: 99%