Article
Materials Science, Multidisciplinary
Yi Wei, Zhuo Liu, Dianguo Xu, Lei Dong, Gang Li, Yunming Wang, Feng Fan, Xudong Meng, Jianmin Song
Summary: This paper investigates the resistive switching phenomenon in Pt/BiFeO3/La0.5Sr0.5CoO3 heterostructures, and it is found that the heterostructures exhibit ferroelectricity and resistive switching effects, which are caused by space-charge-limited conduction mechanism, as confirmed by X-ray diffraction and atomic force microscopy analysis.
Article
Chemistry, Physical
Ming Zheng, Pengfei Guan, Heliang Fan
Summary: This study investigates the influence of mechanical strain on the magnetic properties of CuFe2O4 films by altering the curvature. It is found that strain can significantly enhance the magnetization and exhibit strain tunable magnetic anisotropy and excellent mechanical antifatigue properties.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Sheng-Kai Tong, Ji-Hong Chang, Yong-Han Hao, Ming-Ru Wu, Da-Hua Wei, Yu-Lun Chueh
Summary: By investigating the application of insulating layers of different thicknesses in NiFe2O4 resistive switching memristors, it was found that a 200 nm thick insulating layer provides optimal performance, allowing stable operation at room temperature with excellent switching properties and reproducibility, resulting in high resolution and reversibility.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Pankaj Solanki, Mayur Vala, Dhananjay Dhruv, Sandip V. Bhatt, Bharat Kataria
Summary: This study describes the synthesis and electrical transport properties of GdMnO3/Al-doped ZnO and GdMnO3/ZnO heterostructures grown by vacuum deposition. The structures of the samples are confirmed by XRD and the surface topography is analyzed using AFM. The electrical properties and resistive switching behavior are investigated through Hall measurements and current-voltage characteristics. Raman spectroscopy is used to study the vibrational modes of the MnO6 octahedra. The results provide insight into the conduction mechanisms and resistive switching behavior of these heterostructures.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Jun Li, Zhen-Xun Tang, Xin-Gui Tang, Qiu-Xiang Liu, Yan-Ping Jiang
Summary: This study compares the resistive switching characteristics of amorphous and polycrystalline Bismuth ferrite thin films, finding that the amorphous sample shows better performance in resistive switching. However, the polycrystalline sample exhibits favorable photovoltaic response and good stability. Moreover, the conduction mechanism is closely related to defects such as oxygen vacancies.
Article
Chemistry, Physical
Hongyan Qi, Weixin Wu, Xinqi Chen, Hee Chul Lee
Summary: In this study, BiFeO3/La0.7Sr0.3MnO3 heterostructures were successfully synthesized and stable bipolar resistive switching characteristics regulated by ferroelectric polarization reversal were observed. The conduction mechanism followed the Schottky emission model, and the memristive behavior was explained by the modulation effect on the depletion region width and Schottky barrier height caused by ferroelectric polarization reversal.
Article
Materials Science, Ceramics
M. Kamran, M. Anis-ur-Rehman
Summary: This study investigates the electrical properties of cerium-doped Co-ferrite nanoparticles and discovers their resistive switching effect. With increasing cerium substitution, the resistance, drift mobility, and dielectric constant decrease, while the activation energy increases. The study also finds that the sample with a cerium composition of x = 0.25 exhibits a larger hysteresis loop, making it suitable for nonvolatile ReRAM applications.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Applied
Shangradhanva E. Vasisth, Juan C. Nino
Summary: The research team successfully fabricated core-shell nanowires using a combination of bottom-up and top-down techniques, and demonstrated both bipolar and complementary resistive switching modes. These results are significant for the use of synaptic elements in neuromorphic network architectures.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Jaeyoung Jeon, Kitae Eom, Minkyung Lee, Sungkyu Kim, Hyungwoo Lee
Summary: Collective control of oxygen vacancies in oxide heterostructures enables reliable and gradual resistive switching, offering a new approach for developing next-generation non-volatile memory devices.
Article
Materials Science, Ceramics
Lixin Zhang, Bin Xie, Wei Chen, Lining Fan, Hui Zheng, Qiong Wu, Peng Zheng, Liang Zheng, Yang Zhang
Summary: In this study, Pt/Ni0.5Zn0.5Fe2O4/Pt (Pt/NZFO/Pt) sandwich structure material with different NZFO film thicknesses were synthesized on an Al2O3 substrate using the pulsed laser deposition method. The resistive switching characteristics of the Pt/NZFO/Pt composite films were investigated, and it was found that they exhibited excellent resistive switching behavior with adjustable set/reset voltage, large memory window, and good retention. The resistive switching mechanism was attributed to the formation and rupture of conducting path by oxygen vacancies. The thickness of the NZFO film could regulate the resistive switching behavior to meet different potential applications.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Milena Cervo Sulzbach, Huan Tan, Saul Estandia, Jaume Gazquez, Florencio Sanchez, Ignasi Fina, Josep Fontcuberta
Summary: Researchers have found that ferroelectric and resistive switching behavior can be observed in 2 nm thick epitaxial Hf0.5Zr0.5O2 (HZO) tunnel junctions. These devices exhibit memristive and spike-timing-dependent plasticity behavior, with good retention.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Physical
Yoonho Ahn, Jong Yeog Son
Summary: This study investigated the resistive switching characteristics of NiO nanodots and found that as the thickness of NiO nanodots decreased, the forming voltage, SET, and RESET voltages also decreased, leading to more stable forming voltage distribution. These findings provide valuable insights for the development of future NiO nanodot resistive random access memory devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Applied
Xuepeng Xiang, Jingjing Rao, Zuyun He, Mengzhen Zhou, Qicheng Huang, Yuan Gao, Zhen Fan, Xinwei Wang, Yan Chen
Summary: The uniaxial strain of SrCoO2.5 (SCO) thin film can be controlled by low-energy helium irradiation, leading to improved resistive switching performance. The device irradiated with 1 x 10(14) ions/cm(2) shows the best performance.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Wanxuan Xie, Yang Zhong, Dehui Wang, Lun Zhong, Lu Han, Qiongfen Yang, Wenjing Jie
Summary: This study demonstrates the co-existence of digital and analog resistive switching in synaptic memristors based on 2D BiOI nanosheets. The memristors show typical bipolar resistive switching behaviors and can emulate learning-forgetting experience and Pavlov's dog experiment.
MATERIALS & DESIGN
(2023)
Article
Biochemistry & Molecular Biology
Zhifei Liu, Yaqi Tan, Xuefeng Ruan, Jing Guo, Wei Li, Jiajun Li, Hongyu Ma, Rui Xiong, Jianhong Wei
Summary: In this study, bismuth ferrite-based composites were synthesized by a facile and quick hydrothermal method combined with spark plasma sintering (SPS). The SPS-assisted synthesized samples exhibited significantly enhanced photoelectric and photocatalytic performance.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Haboussi Mohamed, Vijay Gunasekaran, Jeyaraj Pitchaimani, Vasudevan Rajamohan, Gourav Kotriwar, Ganapathi Manickam
Summary: In this study, the effect of curvilinear fiber reinforcement on damping of composite plates is comprehensively investigated using a higher-order shear flexible model. The proposed model is validated and the results show that the damping performance of the curvilinear fibers plate is better than the conventional composite laminate. The study also reveals that the damping increases with the skew angle of the plate. Overall, this research demonstrates the suitability of variable stiffness composite structures for safe design under dynamic/impact loading conditions.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
Haidong Lu, Yueze Tan, Leonie Richarz, Jiali He, Bo Wang, Dennis Meier, Long-Qing Chen, Alexei Gruverman
Summary: Piezoresponse force microscopy (PFM) is used to investigate the electromechanical behavior of the head-to-head (H-H) and tail-to-tail (T-T) domain walls on the non-polar surfaces of three uniaxial ferroelectric materials. It is found that the crystal at the H-H and T-T domain walls exhibit an out-of-plane deformation even in the absence of the out-of-plane polarization component due to a specific form of the piezoelectric tensor. The dominant contribution comes from the counteracting shear strains on both sides of the domain walls, regardless of the materials' symmetry.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Electrochemistry
Sarita Yadav, Aditya Sharma Ghrera, Ambika Devi, Abhimanyu Rana
Summary: The fabrication of high-performance supercapacitors involves selecting suitable electrode materials, optimizing morphology, and using an efficient synthesis approach. This study utilizes a integrated synthesis approach to improve the electrochemical stability of nickel cobaltite (NiCo2O4). The resulting hierarchical flower-like NiCo2O4@TiN nanosheets grown on nickel foam exhibit high specific capacity, excellent rate capability, and cycling stability, making them suitable for the fabrication of supercapacitor devices.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Saman Bagheri, Jehad Abourahma, Haidong Lu, Nataliia S. Vorobeva, Shengyuan Luo, Alexei Gruverman, Alexander Sinitskii
Summary: This paper demonstrates a high-yield fabrication of electromechanical devices based on individual suspended monolayer MXene flakes. The devices show stable electromechanical responses and high electrical conductivity.
Article
Physics, Applied
C. J. McCluskey, A. Kumar, A. Gruverman, I. Luk'yanchuk, J. M. Gregg
Summary: Ferroelectric domain walls usually have enhanced electrical conductivity, but in lead germanate, head-to-head and tail-to-tail walls are electrically insulating. Recent studies suggest that this is because polar divergence is obviated by domain bifurcation and suspected local dipolar rotation. A study using tomographic piezoresponse force microscopy on triglycine sulfate confirms that mutual domain bifurcation and suspected local dipolar rotation are not unique to lead germanate and may be widely present in other uniaxial ferroelectrics.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Michael J. Loes, Alexey Lipatov, Nataliia S. Vorobeva, Haidong Lu, Jehad Abourahma, Dmitry S. Muratov, Alexei Gruverman, Alexander Sinitskii
Summary: In this study, the decoration of two-dimensional (2D) materials with MAPbI3 nanoparticles is shown to enhance their visible light photoresponse. The approach was demonstrated using 2D SnS2, which has limited absorption in the visible range. Field-effect transistors based on the decorated SnS2 showed increased photoresponse throughout the visible spectrum. The decorated devices exhibited stable and reproducible photoswitching behavior.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Bobby G. Sumpter, Kunlun Hong, Rama K. Vasudevan, Ilia Ivanov, Rigoberto Advincula
Summary: With new instrumentation design, robotics, and in-operando hyphenated analytical tool automation, the intelligent discovery of synthesis pathways is becoming feasible, potentially bridging the gap for the scale-up of new materials.
Article
Computer Science, Artificial Intelligence
Sergei Kalinin, Rama Vasudevan, Yongtao Liu, Ayana Ghosh, Kevin Roccapriore, Maxim Ziatdinov
Summary: Microscopy provides an ideal experimental environment for the development and deployment of active Bayesian and reinforcement learning methods. By utilizing domain-specific deployable algorithms and static datasets, machine learning methods can be applied to microscopy and chemical imaging, accelerating real-world ML applications and scientific progress.
MACHINE LEARNING-SCIENCE AND TECHNOLOGY
(2023)
Article
Computer Science, Artificial Intelligence
Arpan Biswas, Rama Vasudevan, Maxim Ziatdinov, Sergei Kalinin
Summary: Unsupervised and semi-supervised ML methods like VAE are widely used in physics, chemistry, and materials sciences for disentangling representations and finding latent manifolds in complex experimental data. This study explores a latent Bayesian optimization approach for hyperparameter trajectory optimization in unsupervised and semi-supervised ML, demonstrated by joint-VAE with rotational invariances. The method is applied to finding joint discrete and continuous rotationally invariant representations in the MNIST database and a plasmonic nanoparticles material system.
MACHINE LEARNING-SCIENCE AND TECHNOLOGY
(2023)
Article
Computer Science, Artificial Intelligence
S. V. Venkatakrishnan, Chris M. Fancher, Maxim Ziatdinov, Rama Vasudevan, Kyle Saleeby, James Haley, Dunji Yu, Ke An, Alex Plotkowski
Summary: Neutron diffraction is a useful technique for mapping residual strains in dense metal objects. In this paper, the authors propose an object adaptive sampling strategy to measure the significant points first and predict the next most informative positions to measure. They demonstrate the real-time measure-infer-predict workflow on additively manufactured steel parts, leading to faster strain mapping with useful real-time feedback.
MACHINE LEARNING-SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Sarita Yadav, Aditya Sharma Ghrera, Abhimanyu Rana, Ambika Devi
Summary: Supercapacitors, known for their high power density compared to batteries, face the challenge of lower electrical energy density. To tackle this, researchers are exploring new nanostructured electrode materials, particularly metal oxides and composites. This study highlights the importance of current collectors in the electrochemical performance of supercapacitor electrodes and investigates the contribution made by different current collectors.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Correction
Chemistry, Multidisciplinary
Anchal Rana, Aditya Yadav, Govind Gupta, Abhimanyu Rana
Summary: Correction has been made for the article 'Infrared sensitive mixed phase of V7O16 and V2O5 thin-films' by Anchal Rana et al., which provides an analysis of the corrected content and conclusions.
Article
Chemistry, Multidisciplinary
Anchal Rana, Aditya Yadav, Govind Gupta, Abhimanyu Rana
Summary: We present an efficient method of growing infrared (IR) sensitive mixed phase of V7O16 and V2O5 thin films at low temperatures. The mixed phase can be stabilized by annealing amorphous VxOy at 300-400 degrees C, and is fully converted into V2O5 after annealing at 450 degrees C. The optical transmission of the films increases with the content of V2O5, while the electrical conductivity and optical bandgap decrease. The IR sensitivity is explained by plasmonic absorption by the V7O16 degenerate semiconductor.
Article
Multidisciplinary Sciences
Marti Checa, Addis S. Fuhr, Changhyo Sun, Rama Vasudevan, Maxim Ziatdinov, Ilia Ivanov, Seok Joon Yun, Kai Xiao, Alp Sehirlioglu, Yunseok Kim, Pankaj Sharma, Kyle P. Kelley, Neus Domingo, Stephen Jesse, Liam Collins
Summary: Unraveling local dynamic charge processes is essential for progress in various fields. Researchers have developed high-speed sparse scanning Kelvin probe force microscopy, enabling sub-second imaging of nanoscale charge dynamics and enhancing understanding of material heterogeneities.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Darshika Khone, Sandeep Kumar, Mohammad Balal, Sudipta Roy Barman, Sunil Kumar, Abhimanyu Singh Rana
Summary: Highly transparent resistive-switching devices were fabricated and their characteristics could be tuned by adjusting the top electrode and film thickness.
SCIENTIFIC REPORTS
(2023)
