Article
Materials Science, Multidisciplinary
A. Makarochkin, E. Yahel, G. Makov
Summary: Tungsten and tungsten alloys are used as structural materials in nuclear facilities due to their excellent mechanical and thermal properties. Blistering, as a primary failure mechanism, may shorten the erosion lifetime of components. Recent studies have found larger blisters formed from MeV proton irradiation compared to keV irradiation. A model of blister growth under irradiation, combining plate bending and crack propagation mechanisms, is developed. The model is evaluated by comparing with experimental results from MeV proton irradiation on tungsten. The effect of irradiation on material properties is discussed in the context of the model and experimental results.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yu-Hong Lai, Jun-Ding Zheng, Si-Cheng Lu, Yin-Kuo Wang, Chun-Gang Duan, Pu Yu, Yun-Zhe Zheng, Rong Huang, Li Chang, Ming-Wen Chu, Ju-Hung Hsu, Ying-Hao Chu
Summary: In condensed matter physics, oxide materials exhibit diverse and intriguing physical properties, making the development of functional oxides an important field of study. This research focuses on stabilizing PbSnO3 thin films with different orientations using a heteroepitaxial approach supported by theoretical calculations. Through X-ray diffraction and transmission electron microscopy, the structural information of the thin films is revealed. The electrical characterizations confirm the anticipated antiferroelectric behavior, including double hysteresis and butterfly loops. The study also investigates the phase transition and determines the transition temperatures based on temperature-dependent structural and electrical characterizations. Furthermore, scanning transmission electron microscopy provides atomic resolution images, revealing the microscopic antiferroelectric order. This work represents a significant breakthrough in synthesizing epitaxial PbSnO3 thin films and comprehensively understanding their anisotropic antiferroelectric behavior.
Article
Multidisciplinary Sciences
Ilaria Fratelli, Andrea Ciavatti, Enrico Zanazzi, Laura Basirico, Massimo Chiari, Laura Fabbri, John E. Anthony, Alberto Quaranta, Beatrice Fraboni
Summary: The study demonstrates that flexible organic detectors based on thin films can directly detect 5-MeV protons and convert their energy into electrical current for measurement. These sensors can measure the dose of protons in real time and also in integration mode, with high sensitivity and a low limit of detection. The detectors proposed in this study show potential for use as proton dosimeters in various fields, including medical proton therapy.
Article
Physics, Applied
Xueting Liu, Ning Liu, Guoqiang Zhang, Limin Zhang, Tieshan Wang
Summary: By analyzing the results of proton irradiation experiments on GaAs materials with different proton energies, it was found that Si-doped GaAs has lower structural stability compared to intrinsic GaAs but exhibits more stable optical properties. These findings contribute to a better understanding of the effects of proton irradiation on GaAs materials.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Mythili Surendran, Huandong Chen, Boyang Zhao, Arashdeep S. Thind, Shantanu Singh, Thomas Orvis, Huan Zhao, Jae-Kyung Han, Han Htoon, Megumi Kawasaki, Rohan Mishra, Jayakanth Ravichandran
Summary: This study reports the direct epitaxial thin film growth of chalcogenide perovskite BaZrS3 by pulsed laser deposition, showing smooth film surfaces and strong potential for photovoltaic applications. The films exhibit clear epitaxial relationship with the substrate, and photodetector devices demonstrate fast and efficient photo response, making BaZrS3 a promising candidate for ultrathin front absorbers in tandem solar cells.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Takumi Sakagami, Reika Ota, Jun Kano, Naoshi Ikeda, Tatsuo Fujii
Summary: Epitaxial YbFe2O4-delta films with nearly single-domain structure were successfully fabricated using RF magnetron sputtering method, displaying coupling between magnetization and electric polarization. Improved oxygen stoichiometry was achieved by controlling oxygen partial pressure during deposition, resulting in sharp ferrimagnetic transition with transition temperature increasing linearly with decreasing PO2. The electron diffraction pattern confirmed the presence of three-dimensional charge order in the stoichiometric films, consistent with behavior of bulk crystals.
Article
Multidisciplinary Sciences
Jijie Huang, Weijin Chen
Summary: This article summarizes the methods for fabricating high-quality flexible oxide thin films with novel functionalities and applications, and introduces various functionalities and applications of these films.
Article
Chemistry, Multidisciplinary
Laura Basirico, Ilaria Fratelli, Matteo Verdi, Andrea Ciavatti, Luisa Barba, Olivia Cesarini, Giorgio Bais, Maurizio Polentarutti, Massimo Chiari, Beatrice Fraboni
Summary: This study presents a flexible proton beam detector based on mixed 3D-2D perovskite films deposited onto thin plastic foils. The detector exhibits excellent flexibility and stable electric transport properties. It demonstrates a stable response to proton irradiation, with high sensitivity and low detection limit.
Article
Multidisciplinary Sciences
Shu Shi, Haolong Xi, Tengfei Cao, Weinan Lin, Zhongran Liu, Jiangzhen Niu, Da Lan, Chenghang Zhou, Jing Cao, Hanxin Su, Tieyang Zhao, Ping Yang, Yao Zhu, Xiaobing Yan, Evgeny Y. Tsymbal, He Tian, Jingsheng Chen
Summary: The authors demonstrate the stabilization of the metastable orthorhombic phase in Hf0.5 Zr0.5O2 films through interface engineering and hole doping.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Xianlong Cheng, Chao Zhou, Baichen Lin, Zhenni Yang, Shanquan Chen, Kelvin H. L. Zhang, Zuhuang Chen
Summary: Fluorite-structured Hf0.5Zr0.5O2 (HZO) thin films have gained attention for their good CMOS-compatibility and robust ferroelectricity. However, the challenges of high leakage current and poor endurance hinder the application of HZO in microelectronic devices. This study investigates the electric properties of Pt/HZO/La0.7Sr0.3MnO3 (LSMO) heterostructures and finds that the leakage mechanism is dominated by Schottky emission. By post-annealing in oxygen atmosphere, the barrier height can be increased, effectively reducing leakage current and improving endurance.
APPLIED MATERIALS TODAY
(2023)
Article
Chemistry, Multidisciplinary
Yogesh Sharma, Binod Paudel, Amanda Huon, Matthew M. Schneider, Pinku Roy, Zachary Corey, Rico Schonemann, Andrew C. Jones, Marcelo Jaime, Dmitry A. Yarotski, Timothy Charlton, Michael R. Fitzsimmons, Quanxi Jia, Michael T. Pettes, Ping Yang, Aiping Chen
Summary: This study investigates the relationship between strain engineering, point defects, and ferromagnetism in actinide epitaxial thin films, and provides new insights into the influence of coupled order parameters on the emergent properties of actinide materials.
Article
Materials Science, Multidisciplinary
Einar B. Thorsteinsson, Arni S. Ingason, Fridrik Magnus
Summary: In this study, the magnetocrystalline anisotropy of Mn2GaC was found to have (0 0 0 1) as the easy plane, providing experimental evidence of the anisotropic properties associated with the nanolaminated structure. Additionally, the noncollinear magnetic state was observed to be unchanged below 50 K, contrary to previous results.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Physics, Applied
E. Nichelatti, V. Nigro, M. Piccinini, M. A. Vincenti, A. Ampollini, L. Picardi, C. Ronsivalle, R. M. Montereali
Summary: This study demonstrates that photoluminescent color centers formed in LiF films and crystals under proton irradiation can be used for proton beam diagnostics and dosimetry. The research shows that the positions of Bragg peaks in LiF films coincide with those expected in silicon substrates, and a small grazing angle of the impinging proton beam can significantly alter the shape of the Bragg curve in the films.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Applied
Yutaro Takeuchi, Ryotaro Okuda, Junta Igarashi, Butsurin Jinnai, Takaharu Saino, Shoji Ikeda, Shunsuke Fukami, Hideo Ohno
Summary: In this study, a thin-film deposition technique for a-few-nanometer-thin L1(0)-MnAl was developed and its structure and magnetic properties were investigated. The results show that L1(0)-MnAl has a large crystalline anisotropy and small spontaneous magnetization, making it a promising material for high-density and high-speed STT-MRAM.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Ankit Kumar, S. K. Singh, Pravin Kumar, A. S. Dhaliwal
Summary: Phase transformations in zirconia thin films induced by ion-beam irradiation have been studied. The structural and morphological properties of the films were modified after irradiation with different fluences. For the as-deposited film, an amorphous phase transformed into a cubic phase with increasing fluence, while for the annealed film, a fraction of cubic phase transformed into a monoclinic phase with increasing fluence. Surface features, such as grain agglomeration and grain boundary diffusion, were observed with increasing fluence.
JOURNAL OF MATERIALS RESEARCH
(2022)
