Article
Mechanics
Chien-hong Lin, Ying-Zhao Lin
Summary: Two micromechanical formulations were established for analyzing nonlinear magnetoelectric coupling in composite materials with different connectivities. The study showed that the magnetoelectric coupling in the composites can be modulated by the connectivity and constituent proportion, and the field-dependent magnetoelectric responses lead to significant differences between linear and nonlinear predictions.
COMPOSITE STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Jakub Grotel, Tomasz Pikula, Rafal Mech
Summary: This paper presents a study on the magnetoelectric (ME) properties of PZT/Terfenol-D composite with varying number of layers. The composite consists of piezoelectric and magnetostrictive phases mechanically coupled together. The research observed relatively strong room-temperature magnetoelectric coupling effects between the piezoelectric and magnetostrictive phases, and detected multiple, grouped signal peaks with band-like characteristics, which could be an important step towards wider commercial use of the materials.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Multidisciplinary
Yun Zhou, Siyu Yang, Yongjie Yi, Cheng Lan, Jianfeng Wang, Long Xu
Summary: An electret film and a magnetostrictive rod were combined to create a magnetoelectric sensing system. Dynamic magnetoelectric measurement was used to study the voltage output of the system, showing a significant non-bias-field magnetoelectric response. Both the capacitance and magnetoelectric voltage coefficient were affected by the AC and DC magnetic field. The ME voltage coefficient exhibited a step decrease with an increase in the DC field, with a maximum tunability of 99.8%.
Article
Chemistry, Analytical
Juntae Kim, Ickjin Kwon
Summary: In this paper, an optimal design method for a high-efficiency DC-DC boost converter is proposed for RF energy harvesting IoT sensors. By analyzing and modeling the losses, a method for obtaining the optimal design parameters by minimizing the total loss according to different input voltages is proposed. The designed DC-DC boost converter achieves high power conversion efficiency at different input voltages.
Article
Energy & Fuels
Deepak Kumar, Tavishi Tewary
Summary: The world is currently focusing on achieving energy security and sustainable development through the utilization of cleaner energy resources. Hybrid energy systems have emerged as a promising source to augment existing energy infrastructure and reduce the impact of challenges posed by energy scarcities.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Physics, Applied
Deepa Xavier, S. Dinesh Kumar, V Subramanian
Summary: This study employs a magnetoelectric (ME) layered composite consisting of a thick film of P(VDF-TrEE) piezoelectric polymer and a 48% nickel-iron (48%NiFe) alloy, achieving a ME coupling coefficient (alpha(ME)) as high as 1002 mV cm(-1) Oe(-1). The experimental results are supported by theoretical analysis and simulation using COMSOL (R) Multiphysics. The voltage measurement from the laminate composite demonstrates its potential as an efficient ME-based energy harvester, outperforming a comparable P(VDF-TrEE)/nickel bilayer laminate by 54%.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Analytical
Yanfei Wei, Xin Yang, Yukai Chen, Zhihe Zhang, Haobin Zheng
Summary: This paper investigates the significant impact of loss effect in smart materials on transducers and proposes improved circuit and finite element models for the more predictable design of high-power giant magnetostrictive transducers.
Article
Multidisciplinary Sciences
Seok Bin Kwon, Jung Hyeon Yoo, Seung Hee Choi, MinYoung Na, Bo Young Kim, Seon Young Lee, Ho-Jung Jeong, Wan Ho Kim, Seoung Hyok Park, Ho Shin Yoon, Bong Kyun Kang, Young Hyun Song, Dae Ho Yoon
Summary: This study investigates the characteristics of a ceramic phosphor synthesized by high-frequency induction heated press (HFP) sintering for the converter of a high-power laser diode-based automobile headlamp, and demonstrates that the HFP method can produce ceramic phosphors with remarkable optical properties.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Junwei Li, Yuexing Zhang, Ting Liang, Xue Bai, Yunsong Pang, Xiangliang Zeng, Qinghua Hu, Wendian Tu, Zhenqiang Ye, Guoping Du, Rong Sun, Xiaoliang Zeng
Summary: With the advancement of microprocessors, heat dissipation has become a critical issue. Researchers have developed a thermal interface material with high thermal conductivity and excellent elastic compliance, suitable for high-performance computing needs.
CHEMISTRY OF MATERIALS
(2021)
Article
Engineering, Multidisciplinary
Sonia Bradai, Slim Naifar, Carlo Trigona, Salvatore Baglio, Olfa Kanoun
Summary: The research proposes a method of using RMSHI circuits for voltage rectification, which effectively utilizes low output voltages from electromagnetic transducers under weak vibration conditions. Through experimental verification, the electromagnetic transducer tested in a noisy environment showed high energy income capability. Additionally, by adding magnetoelectric transducers to the bistable structure, the performance of the electromagnetic transducer under random vibration conditions was significantly improved.
Article
Materials Science, Ceramics
N. A. Gazouly, Ahmed E. Hannora, Hesham A. Yousef, M. A. Sayed, Atif Mossad Ali, M. M. El-Desoky
Summary: The nanostructured BFPT sample synthesized by mechanochemical method exhibits high dielectric permittivity at high temperature and recoverable energy density and energy storage efficiency at room temperature. These samples also show potential for magnetoelectric device applications.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Acoustics
Mingzhi Yang, Xin Yang, Yanfei Wei, Zhihe Zhang, Yukai Chen
Summary: Modeling is crucial for predicting and simulating the performance of transducer design. The equivalent circuit modeling (ECM) is a powerful tool but existing models for Terfenol-D transducers often ignore material losses and magnetic flux leakage. This article proposes an improved SPICE model that considers these factors and validates its effectiveness with experimental results.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Article
Engineering, Multidisciplinary
Idriss Dagal, Burak Akin, Erdem Akboy
Summary: This paper presents a novel hybrid SSPSO algorithm for accurately tracking the global maximum power point (GMPP) of standalone battery charging systems under partial shading conditions. The proposed algorithm outperforms existing techniques in terms of tracking efficiency and provides high-quality tracked power.
AIN SHAMS ENGINEERING JOURNAL
(2022)
Article
Computer Science, Information Systems
Syed Adil Ali Shah, Qurat Ul Ain, Nabeel Ahmed, Muhammad Basim, Young-Gun Pu, Hyungki Huh, Yeonjae Jung, Seokkee Kim, Kang-Yoon Lee
Summary: This article presents a highly efficient electromagnetic energy harvesting system for low frequency applications. The system consists of two stages: an improved EM rectifier utilizing active diodes powered by a passive ac-dc quadrupler, and a step-up dc-dc converter with a soft start circuit and min-max duty generator. The proposed circuit achieves high efficiency and prevents inrush current, improving the overall performance of the system.
Article
Multidisciplinary Sciences
Ehsanur Rahman, Alireza Nojeh
Summary: The working mode of a semiconductor thermionic device depends on material properties and device physics, operating in either the photon enhanced or purely thermionic mode. Photovoltaic technology faces issues with heat generation, while thermionic technology utilizes thermal excitation of electrons to address this challenge.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Applied
Yunping Niu, Hao Ren
Summary: This article introduces a miniaturized LF magnetoelectric (ME) receiving antenna with an integrated DC magnetic bias, which operates by resonance at its mechanical resonant frequency. The antenna achieves higher performance by integrating the miniaturized DC magnetic bias and has potential applications in portable electronics, Internet of things, and underwater communications.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
Haichao Cao, Hao Ren
Summary: This paper reports a silicon oxide based conductive bridging random access memory (CBRAM) with an ultra-low operation voltage, a high switching speed, and an ultra-low resistance at low resistance state (LRS). The CBRAM has potential applications in high-speed, ultra-low voltage, and ultra-low power electronics.
APPLIED PHYSICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Yunping Niu, Hao Ren
Summary: A miniaturized standalone LF magnetoelectric transmitting/receiving antenna pair is proposed in this paper, with integrated magnetic bias to significantly improve the operation range. This antenna, based on mechanical resonance, shows potential for IoT applications with small size and long operation distance.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Jianwei Zhang, Hao Ren, Suren Jayasuriya, Xiao-Jun Tian, Junseok Chae
Summary: This study reports a biological memory effect (BME) in microbial fuel cell (MFC) biosensors, where the response to toxin injections weakens over repeated stimuli. An ordinary differential equation (ODE) model is established and successfully simulates the BME, showing good predictive ability.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Haichao Cao, Xianzheng Lu, Hao Ren
Summary: This paper reports a novel vertically arranged double-electrodes A(0) mode Lamb-wave AlN resonator on SOI substrate with high electromechanical coupling coefficient and figure of merit. The resonator utilizes a sandwich structure and only two vertically arranged electrodes, resulting in higher electric field strength and electromechanical coupling efficiency. The resonant frequency can be defined by photolithography by controlling the width of the silicon layer. The performance of the vertically arranged double-electrodes resonator is significantly better than conventional TFE resonators.
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Zhihao Li, Yunfei Gao, Minkan Chen, Liang Lou, Hao Ren
Summary: In this article, a liquid density sensor based on an aluminum nitride (AlN) piezoelectric micromachined ultrasonic transducer (PMUT) is reported. It addresses the drawbacks of traditional liquid density sensors by utilizing CMOS-compatible AlN as the piezoelectric material and measuring the change in resonant frequency of the PMUT to calculate the liquid density.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)