Article
Engineering, Electrical & Electronic
Xiaoyan Zhang, Xu Yang, Zhaopeng Wang, Qi Pan, Baojin Chu, Ruzhong Zuo
Summary: In this work, the composition and sintering temperature of BiFeO3-based ceramics were optimized to improve the piezoelectric response, mechanical quality factor, ferromagnetic property, and magnetoelectric response. A significant increase in the magnetoelectric coefficient alpha(E) was achieved with Mn doping content of 0.75 mol% and sintering temperature of 1030 degrees C.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
D. G. Farkas, D. Szaller, I Kezsmarki, U. Nagel, T. Room, L. Peedu, J. Viirok, J. S. White, R. Cubitt, T. Ito, R. S. Fishman, S. Bordacs
Summary: The magnetic-field dependence of THz absorption and nonreciprocal directional dichroism spectra of BiFeO3 was investigated, revealing optical selection rules of spin-wave excitations and the effects of in-plane magnetic fields on cycloidal q vectors. Changes in strength and frequency of spin-wave modes were observed with the orientation and length of the q vector, with experimental data compared to linear spin-wave theory to identify relevant spin-polarization coupling terms for the optical magnetoelectric effect.
Article
Mechanics
Zhi-Ming Hu, Yu Su, Jackie Li
Summary: In this paper, a two-level micromechanics model is established to study the nonlinear magnetoelectric effects of multiferroic composites; By treating the ferromagnetic and ferroelectric materials in two phases, the overall effective properties of the composite are calculated and analyzed; The feasibility of the theoretical model is verified by comparing the results with existing experimental data.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Physics, Condensed Matter
Naveen Kumar, Hemant Singh, Satyendra Prakash Pal, Sonu Sarraf, K. L. Yadav, Amit Kumar
Summary: BiFeO3 is an attractive multiferroic ceramic for device application. The study calculated the magnetoelectric coupling coefficient of single-phase BiFeO3 ceramic using theoretical method instead of direct measurement of voltage. An applied magnetic field raises the capacitance of the pellet of BiFeO3, which gives the values of magnetoelectric coupling coefficient.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Multidisciplinary Sciences
Louis Ponet, S. Artyukhin, Th. Kain, J. Wettstein, Anna Pimenov, A. Shuvaev, X. Wang, S. -w. Cheong, Maxim Mostovoy, Andrei Pimenov
Summary: This study demonstrates a method to reverse the electric polarization of multiferroic materials by applying and removing a magnetic field, which requires two cycles to bring the system back to its original configuration. During this process, the system visits four states with different magnetic configurations, with half of the spins undergoing unidirectional full-circle rotation in increments of about 90 degrees. Therefore, this material exhibits a peculiar magnetoelectric switching behavior that converts the variations of the magnetic field into circular spin motion.
Article
Chemistry, Multidisciplinary
Hyeon Jun Lee, Youngjun Ahn, Samuel D. Marks, Deepankar Sri Gyan, Eric C. Landahl, Jun Young Lee, Tae Yeon Kim, Sanjith Unithrattil, Sae Hwan Chun, Sunam Kim, Sang-Youn Park, Intae Eom, Carolina Adamo, Darrell G. Schlom, Haidan Wen, Sooheyong Lee, Ji Young Jo, Paul G. Evans
Summary: The study finds that optical excitation can generate ultrafast stress in the classical multiferroic material BiFeO3. The time scale of stress generation is determined by the dynamics of the excited electronic states and the coupling between electronic configuration and structure. The experimental results provide insights into stress generation mechanisms and point to new applications of nanoscale multiferroics and related ferroic complex oxides.
Article
Engineering, Electrical & Electronic
Gaochao Zhao, Chengbing Pan, Wei Dong, Peng Tong, Jie Yang, Xuebin Zhu, Lihua Yin, Wenhai Song, Yuping Sun
Summary: By co-doping with Cr-Mn, BFC-BTM ceramics achieve a gradual structural transformation from rhombohedral to pseudo-cubic phase, establishing morphotropic phase boundaries. Improved piezoelectric and magnetoelectric properties are observed in samples near the MPB.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Alireza Jalouli, Shenqiang Ren
Summary: Incorporating molecular magnets and molecular ferroelectrics allows for the achievement of magnetoelectric effect at room temperature, a topic of interest in materials science. Experimental results showed that applying an electric field to the composite material led to about 6% change in magnetization at room temperature, and a shift in the resonance magnetic field in ferromagnetic resonance measurement.
Article
Physics, Applied
Guoliang Yuan, Rukai Xu, Hanzhou Wu, Yisong Xing, Chen Yang, Rui Zhang, Wenbin Tang, Yiping Wang, Yaojin Wang
Summary: Magnetoelectric (ME) sensors are important tools for detecting weak magnetic fields, but there are currently no high-quality ME sensors available for high-temperature environments. By bonding a specific piezoelectric ceramic and alloy together using an inorganic glue, a high-temperature ME sensor with excellent piezoelectric performance and maximum stress was achieved. The sensor also exhibited high magnetic field detecting precision at different temperatures.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Wan-Rong Geng, Yun-Long Tang, Yin-Lian Zhu, Yu-Jia Wang, Bo Wu, Li-Xin Yang, Yan-Peng Feng, Min-Jie Zou, Tong-Tong Shi, Yi Cao, Xiu-Liang Ma
Summary: This study demonstrates the existence of multi-field-driven magnetoelectric-optical coupling mediated by ferroelastic switching at room temperature. It provides a framework for designing potential multifunctional magnetoelectric devices.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Pittala Suresh, Binoy Krishna Hazra, B. Ravi Kumar, Tirthankar Chakraborty, P. D. Babu, S. Srinath
Summary: The co-substitution of La3+ and Ho3+ in BiFeO3 significantly affects its structural, electrical, and magnetic properties, suppressing impurity phases, promoting grain growth, and notably increasing the dielectric constant. Additionally, the co-substitution improves magnetic properties, with 'Ho' enhancing magnetization values and 'La' increasing the magnetic coercivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Xueying Liu, Chenhai Shen, Xueping Li, Tianxing Wang, Mengjie He, Lin Li, Ying Wang, Jingbo Li, Congxin Xia
Summary: Due to unique magnetoelectric coupling effects, two-dimensional multiferroic van der Waals heterostructures (vdWHs) show great potential for next-generation information processing and storage devices. By designing vdWHs with different stacking patterns, different band alignments and semiconductor transitions can be achieved, providing a possible route to realize nanoscale multifunctional spintronic devices.
Article
Materials Science, Multidisciplinary
Depei Zhang, Sachith Dissanayake, Barry Winn, Masaaki Matsuda, Toshimitsu Ito, Randy Fishman
Summary: Polarized inelastic neutron-scattering experiments were conducted to investigate the anisotropic behavior of low-energy spin-wave excitations in a multiferroic BiFeO3. The study successfully separated magnetic excitation modes below 6 meV in and out of the cycloidal plane, and identified several magnon modes including two anisotropic modes that were previously observed using optical spectroscopies. The research also discovered other magnon modes that are not active in optical measurements.
Article
Chemistry, Physical
Runqing Zhang, Peiju Hu, Lingling Bai, Xing Xie, Huafeng Dong, Minru Wen, Zhongfei Mu, Xin Zhang, Fugen Wu
Summary: In this study, two new stable BiFeO3 structures with large spontaneous polarization were found using an ab initio evolutionary algorithm. The discovery expands the structural diversity of BiFeO3 and holds constructive significance for the study of spontaneous polarization in new structures of multiferroic materials.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Iliana Apostolova, Angel Apostolov, Julia Wesselinowa
Summary: The effects of size and doping concentrations on the magnetic, electric, and optical properties of Tb-doped BiFeO3 nanoparticles were investigated using a microscopic model that considers linear and quadratic magnetoelectric coupling. Improved multiferroic properties and band-gap tuning were observed. The magnetization and polarization increased with decreasing nanoparticle size and increasing Tb-doping substitution. The Neel temperature remained unchanged while the Curie temperature decreased with increasing Tb-doping concentration. Doping-induced magnetoelectric coupling was observed. The dielectric constant was discussed in relation to size, doping, and magnetic field. The band gap decreased with decreasing size or increasing Tb dopants due to competing effects of compressive strain, surface oxygen defects, and Coulomb interactions. Increasing Tb dopants and decreasing nanoparticle size improved the magnetoelectric effect.
Article
Materials Science, Multidisciplinary
S. Omid Sayedaghaee, Sergey Prosandeev, Sergei Prokhorenko, Yousra Nahas, Charles Paillard, Bin Xu, L. Bellaiche
Summary: This study predicts and investigates the emergence of domain-wall-induced electromagnons in systems with ferroelectric domain walls, resulting from dynamical couplings between magnons and optical phonons. These electromagnons induce THz resonances in magnetoelectric responses and can be localized near the domain walls or near the middle of domains. Dispersion analysis reveals the behavior and traces it back to single-domain magnetoelectric modes.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
S. Omid Sayedaghaee, Charles Paillard, Sergey Prosandeev, Sergei Prokhorenko, Yousra Nahas, Bin Xu, L. Bellaiche
Summary: This study reveals that the frequency of electromagnons can be controlled by applying electric fields, and this control is correlated with the local characteristics of polar phonons.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Physics, Multidisciplinary
Xue Ma, Marco Di Gennaro, Matteo Giantomassi, Matthieu J. Verstraete, Bin Xu
Summary: Crossed magneto-thermo-electric coefficients of Fe, Co, and Ni are calculated using Boltzmann's transport theory with an explicit consideration of electron-phonon scattering. The results are compared with experimental data, including electronic band structures, phonon dispersion curves, phonon linewidths, and transport spectral functions. Spin polarization and explicit electron-phonon coupling are found to be crucial for obtaining accurate qualitative results, especially for the effect of spin flipping on resistivity and the delicate behavior of the Seebeck coefficient. The study also predicts the spin-dependent Seebeck effect.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Applied
Pauline Dufour, Thomas Maroutian, Maxime Vallet, Kinnary Patel, Andre Chanthbouala, Charlotte Jacquemont, Lluis Yedra, Vincent Humbert, Florian Godel, Bin Xu, Sergey Prosandeev, Laurent Bellaiche, Mojca Otonicar, Stephane Fusil, Brahim Dkhil, Vincent Garcia
Summary: The antiferroelectric state of 45-nm-thick epitaxial thin films of PbZrO3 is observed through the characteristic structural periodicity of dipoles and the double hysteresis of the polarization-electric field response. A transition to a ferroelectric-like state is found to occur in a large temperature window. Atomistic simulations confirm the presence and origin of the ferroelectric state in the films. Electric-field-induced ferroelectric transitions are detected via piezoresponse force microscopy.
APPLIED PHYSICS REVIEWS
(2023)
Article
Physics, Applied
Francesco Delodovici, Cassidy Atkinson, Ran Xu, Pierre-Eymeric Janolin, S. Pamir Alpay, Charles Paillard
Summary: The ability to control the optical properties of a material with an electric field has led to numerous applications such as optical memory devices, communication systems, optical signal processing, and quantum cryptography. Understanding electro-optic effects, especially in thin films, is crucial to improving the efficiency of these applications. This study demonstrates through first-principle calculations that the electro-optic response of certain ferroelectric materials is stable under bi-axial strain and can be enhanced through the electrical control of polarization. These findings have the potential to significantly impact the engineering of future technologies.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Sebastian Meyer, Bin Xu, Matthieu J. Verstraete, Laurent Bellaiche, Bertrand Dupe
Summary: The electrical control of magnons provides new possibilities for information transportation and processing in logic devices. The Dzyaloshinskii-Moriya (DM) interaction plays a crucial role in magnetoelectrical multiferroics by allowing direct control. This study uses density functional theory to determine the origin and strength of the DM interaction in BiFeO3 and highlights the significance of spin current-induced asymmetric potential in multiferroics.
Article
Materials Science, Multidisciplinary
Lingyuan Gao, Charles Paillard, Laurent Bellaiche
Summary: Using ab initio theory, we demonstrate the control of ferroelectricity in hybrid-improper ferroelectric superlattices by light, along with a significant photostriction effect and carrier-induced octahedral tiltings. Trilinear coupling between antipolar and tilting modes drives cationic displacements, leading to a decrease in polarization under light. Our study, supported by experimental evidence, highlights the potential of light as a means to engineer functionalities in materials.
Article
Materials Science, Multidisciplinary
Charles Paillard, Laurent Bellaiche
Summary: CsPbI3 is of high interest for photovoltaic applications, but it prefers to adopt a yellow phase rather than the γ perovskite phase. However, using an original constrained density functional theory method, we show that larger concentrations of photoexcited carriers can effectively reduce the energy difference between the nonperovskite ground state and the γ perovskite phase. This could potentially stabilize the γ phase under strong illumination and make CsPbI3 suitable for other applications.
Article
Materials Science, Multidisciplinary
Jingye Zou, Shenglan Hao, Pascale Gemeiner, Nicolas Guiblin, Omar Ibder, Brahim Dkhil, Charles Paillard
Summary: When rare-earth ions are embedded in a ferroelectric material, their photoluminescence can serve as an all-optical probe for temperature, electric field, and mechanical stimulus. However, the impact of ferroelectric phase transitions on photoluminescence is not well understood. In this study, we demonstrate changes in the photoluminescence of green emission bands during critical ferroelectric transitions in an Er-doped BaTiO3 material. We also find that the intensity ratio and wavelength position difference of sub-peaks provide information on the phase transitions.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Xin Wang, Yehui Zhang, Shiji Xu, Xiang Ming Chen, Laurent Bellaiche, Bin Xu
Summary: We report the theoretical design of a multiferroic material Lu1-xGaxFeO3 based on density functional theory calculations. By varying the concentration of Ga, different structural transitions and variations in electronic properties can be achieved, which show potential for various applications.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Physics, Applied
Long Cheng, Heng Zhang, Ran Xu, Kevin Co, Nicolas Guiblin, Mojca Otonicar, Charles Paillard, Yujia Wang, Brahim Dkhil
Summary: The interaction between domain structure and defects in ferroelectric thin films has been a focus of research. This study demonstrates the role of dislocations in stabilizing the domains of PbTiO3 films on a SrTiO3 substrate during post-annealing above 550 degrees C. The effects of single dislocations and dislocation pairs on domain formation were also explored.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Li-Bin Wan, Bin Xu, Peng Chen, Jin-Zhu Zhao
Summary: This study reassesses the spontaneous out-of-plane polarization phenomenon in the 1T-phase of monolayer MoTe2, confirming its origin in the interaction with twofold degenerate, nonpolar primary order parameters through first-principles calculations and model approaches. Additionally, the study investigates the coupling behavior between the polar mode and the primary mode.
Article
Materials Science, Multidisciplinary
Xue Ma, Ningbo Fan, Jinzhu Zhao, Bin Xu
Summary: Finding ferroelectricity in two-dimensional (2D) materials is important for polarization-related applications and nanosized devices. This study investigates the existence of ferroelectricity in 2D materials and discovers that the nonpolar 1T' phase of 2D transition-metal dichalcogenide molybdenum disulfide is thermodynamically more stable. The study also discusses the effect of strain on other MoX2 monolayers.
Article
Materials Science, Multidisciplinary
R. Arras, C. Paillard, L. Bellaiche
Summary: Brownmillerite oxides possess one-dimensional chiral chain structure and can have their relative stability altered by an external electric field, but cannot change the handedness of the chains at low temperature. Polar phases display negative piezoelectric coefficients.
Article
Materials Science, Multidisciplinary
Kinnary Patel, Bin Xu, Sergey Prosandeev, Romain Faye, Brahim Dkhil, Pierre-Eymeric Janolin, Laurent Bellaiche
Summary: In this study, a novel atomistic effective Hamiltonian scheme is developed to investigate the temperature-dependent physical properties of the prototype antiferroelectric PbZrO3 (PZO) system. The scheme accurately reproduces the experimental features of the complex Pbam orthorhombic phase at low temperatures and the cubic paraelectric phase of Pm3 over bar m symmetry at high temperatures. Additionally, it predicts a novel intermediate state of Pbam symmetry, which exhibits a large dielectric response and thermal expansion consistent with experimental observations.