scholarly journals Phase transition enhanced superior elasticity in freestanding single-crystalline multiferroic BiFeO3 membranes

2020 ◽  
Vol 6 (34) ◽  
pp. eaba5847
Author(s):  
Bin Peng ◽  
Ren-Ci Peng ◽  
Yong-Qiang Zhang ◽  
Guohua Dong ◽  
Ziyao Zhou ◽  
...  
Keyword(s):  
Phase Transition ◽  
Flexible Electronics ◽  
Smart Materials ◽  
Metallic Materials ◽  
Single Crystalline ◽  
Bending Strain ◽  
Multiferroic Bifeo3 ◽  
High Flexibility ◽  
Tetragonal Phase Transition

The integration of ferroic oxide thin films into advanced flexible electronics will bring multifunctionality beyond organic and metallic materials. However, it is challenging to achieve high flexibility in single-crystalline ferroic oxides that is considerable to organic or metallic materials. Here, we demonstrate the superior flexibility of freestanding single-crystalline BiFeO3 membranes, which are typical multiferroic materials with multifunctionality. They can endure cyclic 180° folding and have good recoverability, with the maximum bending strain up to 5.42% during in situ bending under scanning electron microscopy, far beyond their bulk counterparts. Such superior elasticity mainly originates from reversible rhombohedral-tetragonal phase transition, as revealed by phase-field simulations. This study suggests a general fundamental mechanism for a variety of ferroic oxides to achieve high flexibility and to work as smart materials in flexible electronics.

Orthorhombic to tetragonal phase transition in the RBa2Cu3O7−δ system studied by in - situ X-ray powder diffraction measurements

1988 ◽  
Vol 23 (10) ◽  
pp. 1409-1415 ◽  
Author(s):  
Y. Ueda ◽  
A. Mitushima ◽  
H. Toda ◽  
N. Kojima ◽  
M. Yoshikawa ◽  
...  
Keyword(s):  
Phase Transition ◽  
Powder Diffraction ◽  
Tetragonal Phase ◽  
X Ray ◽  
Tetragonal Phase Transition

In situ X-ray diffraction analysis of Pb(Zr0.52Ti0.48)O3 phase transition in CoFe2O4/Pb(Zr0.52Ti0.48)O3 2-2-type bilayer films

2010 ◽  
Vol 25 (S1) ◽  
pp. S45-S47
Author(s):  
Ji-Ning Wang ◽  
Wei-Li Li ◽  
Xiao-Liang Li ◽  
W. D. Fei
Keyword(s):  
Phase Transition ◽  
Diffraction Analysis ◽  
Magnetoelectric Effect ◽  
Bilayer Film ◽  
X Ray Diffraction ◽  
Si Substrate ◽  
X Ray ◽  
Bilayer Films ◽  
Tetragonal Phase Transition

A 2-2-type nanostructure bilayer film of CoFe2O4/Pb(Zr0.52Ti0.48)O3 was successfully prepared on the (111)Pt/Ti/SiO2/Si substrate. The Pb(Zr0.52Ti0.48)O3 layer in the bilayer film is (111) oriented and is a mixture of tetragonal and monoclinic phases. The results from an in situ X-ray diffraction analysis of the multiferroic bilayer film under statistic magnetic field indicate that the monoclinic-tetragonal phase transition was induced by magnetostriction of the CoFe2O4 layer. A large magnetoelectric effect was obtained probably because of the different polarization directions of the tetragonal and monoclinic phases.

scholarly journals Ferroelastic domain structure and phase transition in single-crystalline [PbZn1/3Nb2/3O3]1-x[PbTiO3]x observed via in situ x-ray microbeam

2018 ◽  
Vol 38 (4) ◽  
pp. 1488-1497 ◽  
Author(s):  
Tao Li ◽  
Zehui Du ◽  
Nobumichi Tamura ◽  
Mao Ye ◽  
Saikumar Inguva ◽  
...  
Keyword(s):  
Phase Transition ◽  
Domain Structure ◽  
Single Crystalline ◽  
X Ray

In Situ TEM Observation of Heterogeneous Phase Transition of a Constrained Single-Crystalline Ag2Te Nanowire

Nano Letters ◽  
2010 ◽  
Vol 10 (11) ◽  
pp. 4501-4504 ◽  
Author(s):  
Juneho In ◽  
Youngdong Yoo ◽  
Jin-Gyu Kim ◽  
Kwanyong Seo ◽  
Hyunju Kim ◽  
...  
Keyword(s):  
Phase Transition ◽  
In Situ Tem ◽  
Single Crystalline ◽  
Heterogeneous Phase

Photophysical property change of N-(5-bromo-salicylidene)-3-aminoethylpyridine monohydrated crystals via dehydration phase transition

2021 ◽  
Vol 236 (1-2) ◽  
pp. 43-50
Author(s):  
Haruki Sugiyama
Keyword(s):  
Phase Transition ◽  
Smart Materials ◽  
Uv Light ◽  
Photophysical Properties ◽  
Fluorescence Emission ◽  
Functional Materials ◽  
Intramolecular Proton Transfer ◽  
Uv Light Irradiation ◽  
Colour Changes

Abstract The crystals of N-salicylideneaniline (SA) and SA derivatives are classic functional materials that exhibit reversible colour changes (photochromism) and/or excited-state intramolecular proton transfer (ESIPT) fluorescence emission under ultraviolet (UV) light irradiation. In this study, a novel SA derivative was synthesised with an extended alkyl chain, N-(5-bromo-salicylidene)-3-aminoethylpyridine (5Br-SAEP). The photophysical properties of 5Br-SAEP were characterised in the crystalline state. The monohydrated crystal (1H) of 5Br-SAEP was dehydrated to form the anhydrous crystal (1A) at a relative humidity of less than 76%. The photochromic activity was switched by the dehydration phase transition from the non-photochromic 1H to the photochromic 1A. The quantum yield of fluorescence decreased significantly from 8% in 1H to 3% in 1A. The in situ change of photophysical properties occurred due to the change in the crystal structure. This indicated the potential of the solvated crystals of the SAEP derivatives for applications in novel switching or smart materials.

scholarly journals Phase Transition and Coefficients of Thermal Expansion in Al2−xInxW3O12 (0.2 ≤ x ≤ 1)

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4021
Author(s):  
Andrés Esteban Cerón Cerón Cortés ◽  
Anja Dosen ◽  
Victoria L. Blair ◽  
Michel B. Johnson ◽  
Mary Anne White ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Expansion ◽  
Thermal Shock ◽  
Monoclinic Phase ◽  
Ceramic Materials ◽  
Precipitation Method ◽  
Scanning Calorimetry ◽  
Orthorhombic Crystal ◽  
Co Precipitation

Materials from theA2M3O12 family are known for their extensive chemical versatility while preserving the polyhedral-corner-shared orthorhombic crystal system, as well as for their consequent unusual thermal expansion, varying from negative and near-zero to slightly positive. The rarest are near-zero thermal expansion materials, which are of paramount importance in thermal shock resistance applications. Ceramic materials with chemistry Al2−xInxW3O12 (x = 0.2–1.0) were synthesized using a modified reverse-strike co-precipitation method and prepared into solid specimens using traditional ceramic sintering. The resulting materials were characterized by X-ray powder diffraction (ambient and in situ high temperatures), differential scanning calorimetry and dilatometry to delineate thermal expansion, phase transitions and crystal structures. It was found that the x = 0.2 composition had the lowest thermal expansion, 1.88 × 10−6 K−1, which was still higher than the end member Al2W3O12 for the chemical series. Furthermore, the AlInW3O12 was monoclinic phase at room temperature and transformed to the orthorhombic form at ca. 200 °C, in contrast with previous reports. Interestingly, the x = 0.2, x = 0.4 and x = 0.7 materials did not exhibit the expected orthorhombic-to-monoclinic phase transition as observed for the other compositions, and hence did not follow the expected Vegard-like relationship associated with the electronegativity rule. Overall, compositions within the Al2−xInxW3O12 family should not be considered candidates for high thermal shock applications that would require near-zero thermal expansion properties.

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