Article
Chemistry, Multidisciplinary
Tianyu Li, Shiqing Deng, Hui Liu, Shengdong Sun, Hao Li, Shuxian Hu, Shi Liu, Xianran Xing, Jun Chen
Summary: The study presents a method for driving paraelectrics into ferroelectric states by introducing M/O-deficient perovskite nanoregions, successfully achieving strong ferroelectricity in a prototype paraelectric strontium titanate homoepitaxial film. This method paves the way for creating ferroelectricity in various paraelectrics and generating emergent physical properties, opening up new possibilities in material design.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Ariany Bonadio, Fernando P. Sabino, Andre L. M. Freitas, Marissol R. Felez, Gustavo M. Dalpian, Jose A. Souza
Summary: The stability and maintenance of the crystal structure are the main concerns in using organic-inorganic perovskites in photovoltaic devices. This study explores the tetragonal and cubic phases of MAPbI3 at room temperature, revealing the importance of organic cations in the structural phase transition. The perovskite cubic phase exhibits higher electrical resistivity, faster charge carrier lifetime, and greater light absorption in the green region compared to the tetragonal phase.
INORGANIC CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
M. Tyunina, N. Nepomniashchaia, V. Vetokhina, A. Dejneka
Summary: Sustainable and environmentally friendly strontium titanate thin films demonstrate unprecedented elasto-optic properties, achieving a nearly twofold increase in elasto-optic coefficients compared to cubic STO. These films show excellent transparency and a high index of refraction, indicating potential as a platform for future sustainable acousto-optic materials.
Article
Materials Science, Multidisciplinary
Rasheed Atif
Summary: In this work, the atomic-scale migration in (001) terminated SrTiO3 reconstructed surface was investigated by sputtering and annealing the single crystal multiple times in ultra-high vacuum (UHV) and imaging using scanning tunneling microscope (STM). It was found that an atom-vacancy hopping was observed in square diline at room temperature, which ceased when the sample was annealed at higher temperature, resulting in a more compact network of nanolines.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Physical
Yaoxiang Jiang, Xin Wu, Jianguo Niu, Yunpeng Zhou, Ning Jiang, Fei Guo, Bo Yang, Shifeng Zhao
Summary: Switchable polarization behavior at room temperature is achieved in [(La2NiMnO6)/(La2CoMnO6)](n) double-perovskite magnetic superlattice films by engineering a microstructure with gradient strains, while the ferromagnetic Curie temperature does not show rapid decrease.
Article
Nanoscience & Nanotechnology
P. Homm, M. Menghini, J. W. Seo, S. Peters, J-P Locquet
Summary: The study demonstrates a room temperature Mott metal-insulator transition in 1.5% Cr-doped and pure V2O3 thin films by controlling phase transitions through epitaxial strain. The engineered in-plane lattice constant serves as a tunable parameter for stabilization of structure and properties, leading to unique features unseen in bulk materials. This approach offers a radical new way to create the next generation of Mott devices.
Article
Chemistry, Physical
S. Lokesh Amith, K. Gurunathan
Summary: This work reports a hybrid material-based gas sensor using SnO2 calcinated at two different temperatures and made a composite with reduced graphene oxide (rGO) and polypyrrole (PPy) nanosheets. The ternary hybrid exhibited excellent electronic and structural properties and improved gas sensing performance, especially for ammonia gas.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Dejian Chen, Decai Huang, Mingwei Yang, Kunyuan Xu, Jie Hu, Feixiang Xu, Sisi Liang, Haomiao Zhu
Summary: This study successfully demonstrates the scalable and low-cost preparation of metastable beta-CsPbI3 nanocrystals at room temperature in seconds, showing good monodispersity, narrow-band far-red emission, and high photoluminescence quantum yield. The crystallization dynamics of the nanocrystals were revealed through spectroscopic analysis, and a preliminary indirect X-ray detector based on these nanocrystals was demonstrated.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Materials Science, Ceramics
Chukwudalu Okafor, Kuan Ding, Xiandong Zhou, Karsten Durst, Juergen Roedel, Xufei Fang
Summary: A simple method is reported to mechanically tailor dislocation densities in single-crystal SrTiO3 by increasing the number of indenting cycles using a millimeter-sized Brinell indenter. This approach creates large and crack-free plastic zones over hundreds of micrometers, opening new opportunities in the area of dislocation-tuned functional and mechanical studies.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
A. D. Rata, J. Herrero-Martin, I. Maznichenko, F. M. Chiabrera, R. T. Dahm, S. Ostanin, D. Lee, B. Jalan, P. Buczek, I Mertig, A. Ernst, A. M. Ionescu, K. Doerr, N. Pryds, D-S Park
Summary: This research demonstrates the tunable magnetism in perovskite strontium titanate (STO) thin films by controlling atomic charge defects of titanium and oxygen vacancies. The magnetism can be adjusted by altering the growth conditions and controlling charged defects, providing crucial progress in the design of magnetic STO films for spin-based electronic applications.
Article
Physics, Multidisciplinary
Bo Han, Ruixue Zhu, Xiaomei Li, Mei Wu, Ryo Ishikawa, Bin Feng, Xuedong Bai, Yuichi Ikuhara, Peng Gao
Summary: Disruptions in symmetry at structural defects such as grain boundaries can lead to the emergence of new properties, as demonstrated by the creation of a two-dimensional antiferrodistortive phase at a specific grain boundary in this study. This localized phase could have important implications for the electrical and optical activity of grain boundaries and potentially offer new strategies for future nanoelectronics.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Laura Maurel, Javier Herrero-Martin, Federico Motti, Hari Babu Vasili, Cinthia Piamonteze, Laura J. Heyderman, Valerio Scagnoli
Summary: By utilizing the magnetostrictive properties of CoFe2O4, reversible room temperature control of the Ti electronic structure in SrTiO3-CoFe2O4 heterostructures was demonstrated by inducing local and reversible strain in the SrTiO3. X-ray absorption spectroscopy showed changes in the energy levels of the Ti 3d orbitals under the influence of external magnetic fields, suggesting lattice distortions that could lead to the development of net electric polarization.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
A. Z. Simoes, P. P. Ortega, M. A. Ramirez, H. Moreno, C. M. Aldao, M. A. Ponce, F. Moura
Summary: This study focuses on the synthesis of LTO thin films via the polymeric precursor method and their deposition onto STO substrates using spin coating. The results demonstrate the coexistence of ferromagnetic and ferroelectric responses in the LTO/STO heterojunctions at room temperature. Magnetoelectric coupling is observed under a DC bias magnetic field, and the dielectric constant is affected by the coupling between magnetic and electric dipoles as well as oxygen octahedra distortion. The film-substrate mismatch significantly influences the system's dielectric properties. Overall, this study provides insights into inducing ferromagnetic/ferroelectric phases and understanding oxygen vacancy dynamics for various electronic devices.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Chemistry, Multidisciplinary
Huimin Zhang, Qinxi Liu, Liangzi Deng, Yanjun Ma, Samira Daneshmandi, Cheng Cen, Chenyu Zhang, Paul M. Voyles, Xue Jiang, Jijun Zhao, Ching-Wu Chu, Zheng Gai, Lian Li
Summary: We report the epitaxial growth of 2D non-van der Waals ferromagnetic bilayer FeSb on SrTiO3(001) substrates stabilized by strong coupling to the substrate, which exhibits in-plane magnetic anisotropy and a Curie temperature above 390 K. Our results open a new avenue for further exploring emergent quantum phenomena from the interplay of ferromagnetism and topology for application in spintronics.
Article
Materials Science, Multidisciplinary
Nina Kuzmic, Sreco Davor Skapin, Mikko Nelo, Heli Jantunen, Matjaz Spreitzer
Summary: This paper describes the fabrication of ceramic upside-down lithium molybdate-strontium titanate (LMO-ST) composites at room temperature, which presents a promising alternative to high-temperature sintering. The composites are based on a high ratio of filler ST and LMO binder, with optimized processing aspects to achieve improved functional properties. Potential applications of these composites in the electroceramics industry are highlighted.
FRONTIERS IN MATERIALS
(2021)
