Article
Materials Science, Coatings & Films
Falko Jahn, Steffen Weissmantel
Summary: Boron carbide is a super-hard material suitable for wear resistant coatings. Its hardness is significantly influenced by substrate temperature, with little effect from laser fluence.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
C. Cachoncinlle, E. Millon, X. Portier, C. Hebert, J. Perriere, M. Nistor
Summary: This paper reports on the angular distribution of various properties of a zinc oxide film obtained by pulsed laser deposition on a large SiO2/Si substrate. The film exhibits anisotropy in its structural and physical properties along the substrate. The composition and microstructure of the film also varies in different regions of the substrate.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Microscopy
Shanshan Chen, Yixiao Jiang, Tingting Yao, Ang Tao, Xuexi Yan, Fang Liu, Chunlin Chen, Xiuliang Ma, Hengqiang Ye
Summary: epsilon-Fe2O3 has attracted significant interest in the field of magnetoelectric materials due to its promising physical properties. In this study, epsilon-Fe2O3 (001) thin films were successfully epitaxially grown on SrTiO3 (111) substrates using pulsed laser deposition. The factors that significantly affect the epitaxial growth of epsilon-Fe2O3 thin films, such as oxygen pressure, deposition and annealing temperatures, and laser beam energy, were investigated. The results showed that the epsilon-Fe2O3 thin films exhibited strong magnetic anisotropy, a coercivity of 600 Oe, and an indirect band gap of 3.26 eV.
Article
Materials Science, Multidisciplinary
Feng Wang, Ding Zhang, Yuanjing Zhang, Han Li, Shuting Yang, Qinghui Yang, Huaiwu Zhang
Summary: BaFe12O19 thin films with perpendicular magnetic anisotropy were deposited on GGG (111) substrates using pulsed laser deposition. The effects of annealing temperature on the microstructural, magnetic, and microwave properties of the films were investigated. The results showed that higher annealing temperatures led to better crystallization, higher perpendicular orientation, smoother surface morphology, and improved magnetic properties of the films. The films annealed at 1100°C exhibited a narrow ferromagnetic resonance linewidth and lower microwave loss.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jun Kasahara, Tsukasa Katayama, Akira Chikamatsu, Yosuke Hamasaki, Tetsuya Hasegawa
Summary: In this study, the hexagonal Gd phase of rare-earth iron oxide was synthesized via epitaxial stabilization, resulting in a highly crystalline film. The film exhibited weak ferromagnetism with a lower Neel temperature compared to previously reported films.
Article
Chemistry, Physical
Yongjian Luo, Zhenxun Tang, Xiaozhe Yin, Chao Chen, Zhen Fan, Minghui Qin, Min Zeng, Guofu Zhou, Xingsen Gao, Xubing Lu, Jiyan Dai, Deyang Chen, Jun -Ming Liu
Summary: This study demonstrates that ferroelectric properties can be observed in non-capped dopant-free HfO2 thin films by adjusting the deposition temperature, oxygen pressure, and thickness. A maximum polarization strength of 14.7 mu C/cm(2) was achieved in a 7.4 nm-thick film, suggesting a new method for fabricating high-quality ferroelectric HfO2 thin films.
JOURNAL OF MATERIOMICS
(2022)
Article
Chemistry, Physical
Stefan Andrei Irimiciuc, Sergii Chertopalov, Maksym Buryi, Zdenek Remes, Martin Vondracek, Ladislav Fekete, Michal Novotny, Jan Lancok
Summary: CuI thin films were deposited with controlled morphology, structure, and defect nature in different Ar atmospheres. Band gap tailoring was achieved by controlling the plasma ion kinetic energy. Variation in Ar pressure allowed control over the nature of vacancies. Addition of Ar resulted in preferential scattering and energy losses of Cu ions in the plasma.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Rovena Veronica Pascu, George Epurescu, Iulian Boerasu, Ana -Maria Banici Niculescu, Dumitru Manica, Alexandra Maria Isabel Trefilov, Bogdan Alexandru Sava
Summary: Samarium doped ceria thin films were successfully deposited on Si (100) substrates at 500 and 600 degrees C using Pulsed Laser Deposition. X-ray Diffraction confirmed the presence of Samarium Doped Cerium Oxide crystalline compound in the films. Atomic Force Microscopy and Scanning Electron Microscopy revealed high quality films with low roughness, especially for the sample deposited at 600 degrees C. X-ray Photoelectron Spectroscopy showed an increased proportion of Ce3+ in the deposited films compared to the target. Spectroscopic Ellipsometry analysis calculated a refractive index under 2.2 in the visible and near-infrared domain. Nanoindentation tribometric measurements indicated a decrease in elasticity modulus and hardness with increasing substrate temperature. These films show potential as electrolyte materials for new generation electrochemical devices.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Xiangnan Gong, Menglei Feng, Hong Wu, Hongpeng Zhou, Chunhung Suen, Hanjun Zou, Lijie Guo, Kai Zhou, Shijian Chen, Jiyan Dai, Guoyu Wang, Xiaoyuan Zhou
Summary: This work focuses on improving the quality of highly (100)-oriented SnSe thin films for thermoelectric applications. By controlling key parameters during pulsed-laser deposition and performing vacuum thermal annealing, the film quality was enhanced. The best crystal quality and uniform orientation were achieved on SiO2/Si substrate at 673 K followed by thermal annealing at 673 K for 30 min, showcasing promising Seebeck coefficient and power factor values.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Florin Andrei, Valentin Ion, Ruxandra Birjega, Maria Dinescu, Nicoleta Enea, Dan Pantelica, Maria Diana Mihai, Valentin-Adrian Maraloiu, Valentin Serban Teodorescu, Ioan-Cezar Marcu, Nicu Doinel Scarisoreanu
Summary: The study investigates the formation of self-assembled nanodomains in LaFeO3 epitaxial thin films and their effects on the photoelectrochemical properties, revealing detrimental effects on PEC functional properties when nanopyramids-like domains appear after a thickness threshold. The research provides insights into the structural and stoichiometric features that influence the photocurrent density and onset potential exhibited by LFO photoelectrodes. Moreover, the highest photocurrent density values were observed for the thinnest LFO/Nb:SrTiO3 sample, showing excellent stability over time and unbiased hydrogen evolution from water.
Article
Materials Science, Multidisciplinary
B. M. Silva, J. Oliveira, T. Rebelo, V. B. Isfahani, P. Rocha-Rodrigues, N. Lekshmi, J. H. Belo, F. L. Deepak, A. M. L. Lopes, J. P. Araujo, B. G. Almeida
Summary: Multiferroic Ruddlesden-Popper Ca3Mn2O7 thin films were prepared on SrTiO3 substrates by laser ablation. The films exhibited a ferroelectric phase and an orthorhombic phase, with substrate-induced strain enhancing the multiferroicity. The presence of magnetoelectric interactions and magnetically induced enhancement of dipolar correlations were observed.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Physics, Applied
Anand Kumar Vishwakarma, Bhim Sen Yadav, Anchal Kishore Singh, Sarvesh Kumar, Naresh Kumar
Summary: This article investigates the influence of oxygen vacancies and cationic inversion on the magnetic properties of zinc ferrite thin films. The results demonstrate that the saturation magnetization decreases as the oxygen partial pressure increases. Additionally, it is observed that the film grown at 0.16 mbar exhibits the highest magnetization, indicating the presence of the maximum oxygen vacancies.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2023)
Article
Materials Science, Multidisciplinary
Dingzhang Wu, Yule Li, Xiang Liu, Qingming Chen, Zhiyu Li, Hui Zhang
Summary: LCMOA (La0.67Ca0.33MnO3:Ag-0.2) thin films were prepared on LaAlO3 (LAO) single-crystal substrates using pulsed laser deposition (PLD) technique at different deposition times. The metal-insulation transition temperature and temperature coefficient of resistance first increased and then decreased with increasing deposition time. The optimal deposition time was found to be 10 minutes, where the temperature coefficient of resistance was the highest and the metal-insulation transition temperature was close to room temperature. Additionally, the peak value of laser-induced voltage signal reached its maximum at 10 minutes.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Mohamed Oujja, Karima Tabakkouht, Mikel Sanz, Esther Rebollar, Maria Sanchez-Arenillas, Jose F. Marco, Marta Castillejo, Rebeca de Nalda
Summary: Smooth and uniform amorphous SiC films were successfully grown on Si and SrTiO3 substrates using nanosecond pulsed laser deposition. The morphology, crystallinity, and composition of the films were influenced by the laser wavelength and substrate temperature. The films were characterized by various analytical techniques, and optical emission spectroscopy was employed to evaluate the correlation between the plasma characteristics and film growth.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Jakub Holovsky, Eva Horynova, Lukas Horak, Katarina Ridzonova, Zdenek Remes, Lucie Landova, Rupendra Kumar Sharma
Summary: Molybdenum oxide is a material with high bandgap, work function, and other interesting properties. Using Pulsed Laser Deposition, researchers were able to deposit high transparency MoO3 layers from stoichiometric MoO3 and metal Mo targets at different temperatures and oxygen pressures. Optical properties were accurately tracked using Photothermal Deflection Spectroscopy and Spectral Ellipsometry, while crystallinity and surface morphology were monitored using X-ray diffraction and Scanning Electron Microscopy. Increasing temperature led to smoother, denser layers, narrowing bandgap, and increased sub-gap absorption, with crystallization occurring above 400 degrees C. Sub-gap absorption around 1000 nm depended on temperature and weakly on oxygen pressure.
Article
Materials Science, Multidisciplinary
Kawa M. Kaky, M. I. Sayyed, Farah Laariedh, Alyaa H. Abdalsalam, H. O. Tekin, S. O. Baki
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2019)
Article
Chemistry, Analytical
Allaa A. Jabbar, Alwan M. Alwan
VIBRATIONAL SPECTROSCOPY
(2019)
Article
Chemistry, Physical
M. Sayyed, Kawa M. Kaky, M. H. A. Mhareb, Alyaa H. Abdalsalam, Nouf Almousa, Ghada Shkoukani, Mohamed A. Bourham
RADIATION PHYSICS AND CHEMISTRY
(2019)
Article
Chemistry, Physical
Alyaa H. Abdalsalam, Erdem Sakar, Kawa M. Kaky, M. H. A. Mhareb, Betul Ceviz Sakar, M. I. Sayyed, Ali Gurol
RADIATION PHYSICS AND CHEMISTRY
(2020)
Article
Materials Science, Multidisciplinary
Kawa M. Kaky, M. I. Sayyed, Abbas Khammas, Ashok Kumar, Erdem Sakar, Alyaa H. Abdalsalam, Betul Ceviz Sakar, Bunyamin Alim, M. H. A. Mhareb
MATERIALS CHEMISTRY AND PHYSICS
(2020)
Article
Materials Science, Multidisciplinary
Allaa A. Jabbar, Alwan M. Alwan, Mehdi Q. Zayer, Azhar J. Bohan
MATERIALS CHEMISTRY AND PHYSICS
(2020)
Article
Chemistry, Physical
M. Sayyed, Alyaa H. Abdalsalam, Malaa M. Taki, M. H. A. Mhareb, Bunyamin Alim, Ali Baltakesmez, Erdem Sakar
RADIATION PHYSICS AND CHEMISTRY
(2020)
Article
Materials Science, Multidisciplinary
Kadhim R. Gbashi, Malek A. H. Muhi, Allaa A. Jabbar, Natheer B. Mahmood, Raad F. Hasan
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2020)
Article
Materials Science, Ceramics
Kawa M. Kaky, M. Sayyed, M. H. A. Mhareb, Alyaa H. Abdalsalam, K. A. Mahmoud, S. O. Baki, M. A. Mahdi
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2020)