Article
Physics, Applied
R. Ghosh, A. Barik, M. R. Sahoo, Sweta Tiwary, P. D. Babu, S. D. Kaushik, P. N. Vishwakarma
Summary: This work reports the simultaneous observation of converse magnetoelectric (CME) and direct magnetoelectric (DME) effects in LaYFe2O6. The study found that LaYFe2O6 has a double perovskite structure and exhibits magnetoelectric properties at higher temperatures. The material has high magnetoelectric coefficients, which opens up new possibilities for magnetoelectric-based applications.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Analytical
Dmitri A. Burdin, Dmitri V. Chashin, Nikolai A. Ekonomov, Leonid Y. Fetisov, Vladimir L. Preobrazhensky, Yuri K. Fetisov
Summary: This study investigates the low-frequency magnetoelectric (ME) effects in heterostructures consisting of a layer of antiferromagnetic hematite & alpha;-Fe2O3 crystal with easy-plane anisotropy and a piezoelectric layer. The results show that the frequency tuning of the hematite crystal is linearly related to the increase in the bias field, reaching up to 37%. The frequency tuning of the hematite-PVDF heterostructure is 24% with a ME coefficient of 58 mV/(Oe & BULL;cm). The frequency tuning of the hematite-piezoceramic heterostructure is 4.4% with a ME coefficient of 4.8 V/(Oe & BULL;cm). Additionally, efficient generation of the second voltage harmonic is observed in the hematite-piezoceramic heterostructure.
Article
Engineering, Electrical & Electronic
Rui Chen, Tingyu Deng, Ziyun Chen, Yuhang Wang, Wenning Di, Li Lu, Jie Jiao, Haosu Luo
Summary: This study aims to develop a highly sensitive device for measuring the dc magnetic field. By designing a pair of highly consistent ME sensors and an intelligent differential configuration, we successfully eliminated even-order harmonic components of the output voltage and concurrently superimposed odd-order harmonic components. With a high responsivity of the first harmonic component to the dc magnetic field, we achieved a low detection limit of 0.8 nT.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Physical
S. Dinesh Kumar, Shashaank Gupta, Atal Bihari Swain, V Subramanian, Myoor K. Padmanabhan, Roop L. Mahajan
Summary: The magnetoelectric bilayer composite Sm-doped Pb(Mg1/3Nb2/3)-PbTiO3/NiFe2O4 exhibits a high converse magnetoelectric coefficient and low eddy current losses, making it suitable for ME devices operating in the converse mode. This composite shows excellent performance in voltage to current conversion and magnetic switch applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Shumpei Fujii, Takamasa Usami, Yu Shiratsuchi, Adam M. Kerrigan, Amran Mahfudh Yatmeidhy, Shinya Yamada, Takeshi Kanashima, Ryoichi Nakatani, Vlado K. Lazarov, Tamio Oguchi, Yoshihiro Gohda, Kohei Hamaya
Summary: Research shows that electric-field control can be used to control the magnetization vectors of ferromagnetic electrodes in multiferroic heterostructures. By combining the ferromagnetic Heusler alloy Co2FeSi with the ferroelectric oxide Pb(Mg1/3Nb2/3)O-3-PbTiO3 (PMN-PT), nonvolatile and repeatable magnetization vector switchings can be achieved. This approach has the potential to reduce write power in spintronic memory architectures.
NPG ASIA MATERIALS
(2022)
Article
Chemistry, Analytical
Julius Schmalz, Elizaveta Spetzler, Jeffrey McCord, Martina Gerken
Summary: In this study, magnetoelectric cantilevers consisting of strain-coupled magnetostrictive and piezoelectric layers are investigated for magnetic field measurements. The cantilevers are electrically excited and operated in a special mechanical mode, with resonance frequencies above 500 kHz, exhibiting high-quality factors and a promising limit of detection. Strategies for eliminating external effects and design guidelines to minimize unwanted oscillations are proposed.
Article
Engineering, Electrical & Electronic
Hai Zhou, Changbao Xu, Caijiang Lu, Xueling Jiang, Ziyan Zhang, Jingqi Wang, Xiaobing Xiao, Mingyong Xin, Lei Wang
Summary: This study investigates the transient magnetoelectric response of the symmetric TerfenolD/PZT/Terfenol-D laminate structure under different transient current driving, revealing damping oscillation phenomena. The results suggest that the ME composite is an ideal lightning current sensing device.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Mechanics
Yang Shi, Baoxin Lei, Yongkun Wang, Junjie Ye
Summary: This paper presents an analytical model to evaluate the self-bias magnetoelectric effect of magnetization-graded magnetoelectric composites under extensional-bending coupled vibration. The results indicate the availability of self-bias magnetic field in the composites, which can enhance the self-bias magnetoelectric coupling and adjust the resonance frequency by applying tensile stress or increasing the thickness of the high-permeability layer.
COMPOSITE STRUCTURES
(2022)
Article
Optics
Ao Gao, Jingfu Ye, Chenxi Tu, Yi Liu, Shiliang Qu
Summary: This paper proposes a scheme called under-sampled length spectrum retrieval (ULSR) for fiber Fabry-Perot (F-P) cavity refractive index (RI) demodulation. Unlike the wavelength spectrum method, ULSR can detect physical quantities using only a monochromatic laser and photodetectors, eliminating the need for wideband lasers or expensive infrared spectrometers. By fabricating eight F-P cavities of different lengths to sample the cavity length spectrum, the RI of F-P cavity fillings can be demodulated using the obtained under-sampled length spectrum. The ULSR system achieves an index measurement accuracy of 1 x 10-4 in the glucose solution index range of 1.3294-1.3746 at a wavelength λ = 1.55μm. Higher accuracy and a wider range of index demodulation are expected with more than eight F-P cavities. The proposed scheme has the advantages of low system complexity, low cost, high reliability, high detecting accuracy, and wide detecting range, making it very promising for the wide application of F-P cavity sensors. Additionally, ULSR releases wavelength freedom, making it a strong candidate for multiplexed sensing based on wavelength division multiplexing.
Article
Engineering, Electrical & Electronic
Yong Zhao, Xi-xin Wang, Ri-qing Lv, Hong-kun Zheng, Yi-fan Zhou, Mao-qing Chen
Summary: The magnetic field measurement method using magnetic fluid and Fabry-Perot interferometer shows higher sensitivity and shorter response time. Experimental results demonstrate great potential for applications due to the sensor's high sensitivity, good repeatability, short response time, and low cost.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Chemistry, Analytical
L. Y. Fetisov, M. V. Dzhaparidze, D. V. Savelev, D. A. Burdin, A. V. Turutin, V. V. Kuts, F. O. Milovich, A. A. Temirov, Y. N. Parkhomenko, Y. K. Fetisov
Summary: This paper explores the potential of creating magnetic field sensors using the direct magnetoelectric (ME) effect in a monolithic heterostructure of amorphous ferromagnetic material/langatate. The authors deposited layers of 1.5 mu m-thick FeCoSiB amorphous ferromagnetic material on the surface of langatate single crystal using magnetron sputtering. They obtained a linear conversion ME coefficient of 76.6 V/(Oe center dot cm) at the resonance frequency of 107 kHz. Furthermore, they observed the nonlinear ME effect of voltage harmonic generation with increasing excitation magnetic field, generating second and third harmonics with efficiencies of about 6.3 V/(Oe(2)center dot cm) and 1.8 V/(Oe(3)center dot cm), respectively. The monolithic heterostructure exhibited a hysteresis dependence of ME voltage on a permanent magnetic field due to the presence of ff-Fe iron crystalline phases in the magnetic layer. At the resonance frequency, the structure demonstrated a sensitivity to AC magnetic field of 4.6 V/Oe, a minimum detectable magnetic field of approximately 70 pT, and a low level of magnetic noise of 0.36 pT/Hz(1/2), indicating its potential for use in ME magnetic field sensors.
Article
Chemistry, Analytical
Kunyu Sun, Zhihao Jiang, Chengmeng Wang, Dongxuan Han, Zhao Yao, Weihua Zong, Zhejun Jin, Shandong Li
Summary: The magnetoelectric (ME) sensor is a new type of magnetic sensor that has ultrahigh sensitivity for measuring low-frequency weak magnetic fields. In this study, a metglas/PZT-5B ME sensor with a mechanical resonance frequency f(res) of 60.041 kHz was prepared. With the use of a frequency up-conversion technique, the sensor achieved a limit of detection (LOD) under an AC magnetic field lower than 1 nT at 8 Hz, and a minimum LOD of 0.51 nT at 20 Hz. The high-resolution ME sensor at the sub-nT level shows great potential in the field of low-frequency weak magnetic field measurement technology.
Article
Automation & Control Systems
Yongke Yan, Liwei D. Geng, Lujie Zhang, Cong Tu, Rammohan Sriramdas, Hairui Liu, Xiaotian Li, Mohan Sanghadasa, Khai D. T. Ngo, Yu U. Wang, Shashank Priya
Summary: Air-gapped VTIs demonstrate large inductance tunability through electric field modulation of permeability, but there is a tradeoff between tunability and saturation current. The introduction of air gap significantly reduces tunability while increasing saturation current, and the air gap affects the magnetization, permeability, and tunability of VTIs.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Yamei Yue, Qi Wang, Zhenhua Wu, Jianyu Huang, Dezhi Chen, Zheng Ma, Bin Su
Summary: This article introduces an externally magnetic guided soft robot with tactile sensing ability. The robot utilizes a buoy-type magnetoelectric sensor and a driving base to perceive the surroundings and achieve magnetic drive motion. The sensor has high sensitivity and can detect obstacles. Experimental results demonstrate that the soft robot can detect and quickly avoid obstacles.
APPLIED MATERIALS TODAY
(2022)
Article
Chemistry, Analytical
Xiao Zhou, Yangfan Ruan, Xingang Mou, Yuhao Yuan, Yi He
Summary: A novel dual-magnet structure is proposed in this study, which increases the effective magnetic field by allowing the magnetic induction lines to enter the working air-gap directly. This design improves the sensitivity of a velocity sensor and enhances its ability to detect weak signals.
Review
Nanoscience & Nanotechnology
Cunzheng Dong, Xianfeng Liang, Jingya (Lilyn) Gao, Huaihao Chen, Yifan He, Yuyi Wei, Mohsen Zaeimbashi, Alexei Matyushov, Changxing Sun, Nian X. Sun
Summary: This article provides an overview of the applications of thin film ME sensors in biomagnetic measurement, including different types of sensors, coupling structures, materials selection, fabrication processes, and mechanisms, as well as performance and noise analysis. In addition, real-time applications of ME sensors in detecting magnetic fields from different parts of the human body are showcased.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Engineering, Biomedical
Adam Khalifa, Seyed Mahdi Abrishami, Mohsen Zaeimbashi, Alexander D. Tang, Brian Coughlin, Jennifer Rodger, Sydney S. Cash, Nian X. Sun
Summary: This study proposes a new concept of noninvasive focal stimulation of deep brain regions using temporal interference of two high-frequency magnetic fields. The experimental results show that regions affected by only one high-frequency magnetic field have low C-Fos expression, while regions affected by two fields interfering to create a low-frequency envelope display a significant increase in C-Fos expression.
JOURNAL OF NEURAL ENGINEERING
(2023)
Article
Physics, Applied
Ruoda Zheng, Victor Estrada, Nishanth Virushabadoss, Alexandria Will-Cole, Adrian Acosta, Jinzhao Hu, Wenzhong Yan, Jane P. Chang, Nian X. Sun, Rashaunda Henderson, Gregory P. Carman, Abdon E. Sepulveda
Summary: This paper presents a 400 MHz magnetoelectric (ME) Lamb wave antenna design for use in the medical implant communication service band. The antenna uses a heterostructure of piezoelectric and magnetostrictive membranes to generate acoustic waves and function as a magnetic dipole. Finite element analysis simulations are used to investigate the piezoelectric, micromagnetic, and magnetic dipole radiation aspects of the antenna. An experimental demonstration shows mechanical resonance and ME coupling, indicating that the design can be used as a tunable oscillator or sensor in A(0) mode. This ME approach provides a solution to the miniaturization problem of traditional current-based implantable antennas.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Analytical
Adam Khalifa, Mehdi Nasrollahpour, Ali Nezaratizadeh, Xiao Sha, Milutin Stanacevic, Nian X. Sun, Sydney S. Cash
Summary: Wireless implantable medical devices have advanced significantly in the past three decades, allowing interaction with the nervous system. To enhance stability, safety, and distribution of these interfaces, a new class of sub-mm scale wireless microelectronic devices is being developed. This research presents a simple technique for fabricating and assembling a wirelessly powered stimulating implant, demonstrating high efficiency in in vivo experiments on an anesthetized rat.
Article
Materials Science, Multidisciplinary
A. R. Will-Cole, James L. Hart, Matthew Matzelle, Adrian Podpirka, Nirjhar Bhattacharjee, Shreya K. Patel, Sarah H. Tolbert, Arun Bansil, Judy J. Cha, Don Heiman, Nian X. Sun
Summary: Bilayer topological insulator/ferromagnet heterostructures show low switching energy and high power efficiency for spintronic applications. This study reveals the reaction between topological insulators and ferromagnetic films, leading to spin-pumping and exchange bias phenomena, and emphasizes the need for further investigation on the complex interfaces.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
A. R. Will-Cole, James L. Hart, Valeria Lauter, Alexander Grutter, Carsten Dubs, Morris Lindner, Timmy Reimann, Nichole R. Valdez, Charles J. Pearce, Todd C. Monson, Judy J. Cha, Don Heiman, Nian X. Sun
Summary: Yttrium iron garnet (YIG) grown by liquid phase epitaxy exhibits unique low-temperature magnetization dynamics, with negligible increase in ferromagnetic resonance linewidth down to 10 K. This is attributed to the absence of rare-earth impurities and the suppression of Gd diffusion from the substrate. Compared to YIG films grown by other deposition methods, liquid phase epitaxy YIG films have a sharper YIG/GGG interface and significantly lower ferromagnetic resonance linewidths below 50 K. These films are ideal for low-temperature experiments/applications that require low magnetic losses.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Gurmeet Singh Lotey, Ankush Kumar Tangra, Mohammed Benali Kanoun, Souraya Goumri-Said, Sanjeev Kumar, Mohinder Pal Garg, Alexandr Tovstolytkin, Nian X. Sun
Summary: Perovskite solar cells using inorganic calcium ferrite as a hole electron layer exhibit superior stability and efficiency compared to organic hole electron layers. Time-resolved photoluminescence spectroscopy shows improved charge extraction and reduced recombination at the interfaces. Theoretical analysis validates the experimental results and uncovers the mechanism behind the observed high-power conversion efficiency.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Acoustics
Cheng Tu, Linqian Qiao, Lei Li, Yu Chen, Xiaosheng Zhang
Summary: This study investigates the strain distributions of fundamental and 1st-order Lamb wave modes in AlN-on-Si resonators and analyzes the effects of vibration mode distortion on resonant frequency and piezoelectric transduction.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2023)
Article
Engineering, Electrical & Electronic
Marco Liserre, Yoann Pascal, Jeffrey McCord, Thiago Pereira, Rainer Adelung, Lukas Zimoch, S. Kaps, Xiaxin Li, Nian X. Sun
Summary: Voltage controlled magnetic components are a promising technology that provides circuit designers with additional optimization freedom. This article reviews technologies for creating controlled magnetics and proposes potential applications, with a focus on a use case involving voltage-controlled inductors in a multiport dc-dc converter.
IEEE POWER ELECTRONICS MAGAZINE
(2023)
Article
Engineering, Electrical & Electronic
Hwaider Lin, Xiaoling Shi, Carsten Dubs, Mohan Sanghadasa, Nian Sun
Summary: In order to ensure the reliable operation of GPS receivers in complex electromagnetic environments, measures need to be taken against interfering signals. A new compact and passive thin-film frequency selective limiter (TF-FSL) for GPS applications has been demonstrated, showing low insertion loss, low-power rejection threshold, and high interference signal suppression. The TF-FSL utilizes a new transducer structure and the magnetostatic surface wave of a low-damping yttrium iron garnet (YIG) thin film.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Diptashree Das, Ziyue Xu, Mehdi Nasrollahpour, Isabel Martos-Repath, Mohsen Zaeimbashi, Adam Khalifa, Ankit Mittal, Sydney S. Cash, Nian X. Sun, Aatmesh Shrivastava, Marvin Onabajo
Summary: A magnetoelectric antenna can perform wireless energy harvesting and sensing at different frequencies. This article presents a behavioral circuit model for hybrid ME antennas, which can simulate RF energy harvesting and sensing operations during circuit simulations. The ME antenna is connected to a CMOS energy harvester chip for wireless communication in fully integrated implantable devices. The measurements in this paper demonstrate simultaneous low-frequency wireless magnetic sensing and high-frequency wireless energy harvesting with one dual-mode ME antenna. The proposed antenna model can be used for design optimizations in energy harvesting circuits.
IEEE OPEN JOURNAL OF CIRCUITS AND SYSTEMS
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Xianfeng Liang, Huaihao Chen, Zhongqiang Hu, Hwaider Lin, Hui Huang, Jinghong Guo, Dengfeng Ju, Ming Liu, Nian X. Sun
Summary: This paper presents a mechanically driven antenna utilizing the magnetoelectric effect, which provides ground plane immunity. It reviews the development of magnetoelectric antennas, discusses the theory and experimental demonstration of ground plane immunity, and explores further designs and applications for these antennas.
2022 IEEE MTT-S INTERNATIONAL MICROWAVE WORKSHOP SERIES ON ADVANCED MATERIALS AND PROCESSES FOR RF AND THZ APPLICATIONS, IMWS-AMP
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Cunzheng Dong, Yifan He, Min-Gyo Jeong, William Watson, Mohan Sanghadasa, Nian X. Sun
Summary: Magnetoelectric (ME) antennas have been proven to be a promising solution for very low frequency (VLF) communications. In this study, a new type of ME antenna with high quality factor resonator is proposed to enhance the radiation field strength and efficiency for antenna arrays. The experimental results show that the radiation field can be significantly increased by using multiple antenna arrays, and the efficiency of ME antennas can be improved by a square law of the number of arrays.
2022 IEEE INTERNATIONAL SYMPOSIUM ON PHASED ARRAY SYSTEMS & TECHNOLOGY (PAST)
(2022)
Article
Materials Science, Multidisciplinary
A. R. Will-Cole, Chuangtang Wang, Nirjhar Bhattacharjee, Yongmin Liu, N. X. Sun
Summary: The study demonstrated that voltage/electric-field control of ultrafast magnetization dynamics can achieve electronic tuning with reduced power consumption, improved response time, and more compact form factor, potentially driving the next generation of optomagnetic devices. Experimental results showed that magnetization rotation can be achieved with lower electric field without laser heating, and a mixture of volatile and nonvolatile behaviors were observed.
Article
Engineering, Electrical & Electronic
Nirjhar Bhattacharjee, Krishnamurthy Mahalingam, Adrian Fedorko, Alexandria Will-Cole, Jaehyeon Ryu, Michael Page, Michael McConney, Hui Fang, Don Heiman, Nian Xiang Sun
Summary: The effect of crystalline disorder on the interfacial and magnetic properties of topological insulator/ferromagnet heterostructures was investigated. Interesting phenomena such as enhanced magnetic anisotropy and spin-orbit torque were observed, along with the spontaneous exchange bias at low temperatures.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
