Article
Materials Science, Multidisciplinary
Sreenivasulu Pachari, Swadesh K. Pratihar, Bibhuti B. Nayak
Summary: Enhanced magnetodielectric properties, including magnetocapacitance, are observed in BaTiO3CoFe2O4 composites. The microstructural interactions between the dielectric and magnetic phases play a crucial role. The magnetocapacitance and magnetoresistance of the composites were studied, and it was found that the magnetocapacitance increased nearly 5 times due to microstructural variations. Field and frequency-dependent magnetocapacitance responses confirmed the importance of microstructural interactions and magnetoresistance.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Physics, Applied
K. Meera, R. Muralidharan, Y. H. Jeong
Summary: Mixed-valent cobalt manganese spinel oxide with excess manganese was synthesized and characterized. The crystal structure remained unchanged, but significant changes were observed in the magnetic and magnetodielectric properties.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2022)
Article
Materials Science, Multidisciplinary
Cristian Mendes-Felipe, Rui Carvalho, Pedro Martins, Oleksandr Igorovych Ivankov, Ivan Bobrikov, Viktor Petrenko, Jose Maria Porro, Marco Sangermano, Senentxu Lanceros-Mendez
Summary: Magnetodielectric materials, which allow magnetic control of dielectric response, are highly interesting for IoT-related devices. Photocurable polymers combined with magnetic nanoparticles offer a sustainable and efficient approach for their development. Photocurable magnetic hybrid materials based on PUA and various magnetic micro- and nanoparticles have been developed, with investigations on their physicochemical properties, electrical conductivity, and magnetic properties. By optimizing the filler type and content, composites with high magnetodielectric coefficients have been obtained, making them important for the fabrication of magnetodielectric devices in the digital transition context.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhiyan Chen, Xiangqian Lu, Jiawei Qiao, Jianqiang Liu, Wei Qin
Summary: The response of crystal structure to external stimuli provides potential applications in the areas of detection, diagnosis, and repair. In this study, two allotropic organic cocrystals with different space groups and lattice parameters, but identical donor and acceptor molecules, were fabricated. Under external stimuli, pronounced differences in lattice vibration and electron-phonon coupling were observed in these two crystals, along with different strengths of spin polarizations.
Article
Physics, Multidisciplinary
Pavel Kokhanchik, Dmitry Solnyshkov, Thilo Stoeferle, Barbara Pietka, Jacek Szczytko, Guillaume Malpuech
Summary: We theoretically demonstrate that Rashba-Dresselhaus spin-orbit coupling acts as a synthetic gauge field in lattices. This allows us to control the tunneling coefficients between sites and implement topological Hamiltonians and spin lattices useful for simulations and optimization. We propose a realistic scheme using liquid crystal-based microcavities to realize these concepts.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Arkadeb Pal, C. H. Huang, T. W. Yen, P. H. Lee, Y. H. Chang, C. H. Yeh, T. W. Kuo, Ajay Tiwari, D. Chandrasekhar Kakarla, S. M. Huang, M. C. Chou, H. S. Kunwar, S. Rana, V. G. Sathe, B. H. Chen, Y. C. Chuang, H. D. Yang
Summary: This study reports a spectrum of phenomena induced by helical spin ordering in a noncentrosymmetric and spin-frustrated system Fe-3(PO4)O-3, including magnetodielectric effect, magnetostriction effect, and spin-phonon coupling.
Article
Chemistry, Physical
M. Ozturk, M. Okutan, R. Coskun, B. Colak, O. Yalcin
Summary: This study analyzed the morphological, structural, optical, and dielectric properties of hydrogels doped with different doses of Fe3O4 nanoparticles, revealing their relationship with technological applications. It was concluded that hydrogels with high doses of Fe3O4 NPs are suitable for electrochemical biosensors in bio-systems.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Kaipamangalath Aswathi, Matjaz Valant, Mojca Vrcon Mihelj, Manoj Raama Varma
Summary: Monoclinic Sm2CuMnO6 is a material with fascinating magnetic and dielectric properties. This study investigates its magnetic transition, conduction mechanism, and dielectric behavior. The conduction process is explained by Mott's variable range hopping of polarons, while the presence of competing magnetic interactions is observed through a spin glass transition. Dielectric measurements show temperature and frequency dependence of the dielectric constant, highlighting the complex nature of the dielectric response.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Multidisciplinary Sciences
Run Zhao, Chao Yang, Hongguang Wang, Kai Jiang, Hua Wu, Shipeng Shen, Le Wang, Young Sun, Kuijuan Jin, Ju Gao, Li Chen, Haiyan Wang, Judith L. MacManus-Driscoll, Peter A. van Aken, Jiawang Hong, Weiwei Li, Hao Yang
Summary: In this study, the authors demonstrate an emergent multiferroism with magnetodielectric coupling in EuTiO3 created by a negative pressure control of strong spin-phonon coupling.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Shuang Zhu, Chenfei Shi, Gang Zhao, Wanting Yang, Haiyang Chen, Xiaoxuan Ma, Jin Zhou, Baojuan Kang, Jin-Ke Bao, Shixun Cao
Summary: Co3NiNb2O9 is a compound with multiferroic properties and magnetoelectric coupling effect, allowing manipulation of its ground state by external magnetic fields. High quality Ni-doped Co4Nb2O9 single crystals were synthesized for the first time, and antiferromagnetic order, magnetodielectric effect, and magnetoelectric coupling effect were observed.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Jian Wang, Dandan Gao, Jiyang Xie, Wanbiao Hu
Summary: In disordered rutile NiNb2O6 ceramic, a giant room-temperature magnetodielectric effect is demonstrated due to spin-dependent polaron hopping, which can be controlled by an external magnetic field within a specific temperature range. These findings highlight the competition between polaron hopping activation, spin-lattice coupling, and spin thermal fluctuation in realizing the magnetodielectric effect.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Analytical
Faezeh Zarrinkhat, Luis Jofre-Roca, Marc Jofre, Juan M. Rius, Jordi Romeu
Summary: Detection and characterization of bioparticles is crucial in various fields, including electrophoresis, biomass identification, food and water safety. This study conducted a numerical investigation on Escherichia coli bacteria using two different geometrical models, layered ellipsoids and layered spheres. The results showed that the change in dielectric permittivity of the bacterial cells during cell duplication can be measured at radio frequencies of around 50 kHz. An experimental setup based on the capacitive Wheatstone bridge was designed and used to validate the theoretical model by measuring relative changes in permittivity during cell division. The study confirmed the accuracy of the spheroidal model.
Article
Multidisciplinary Sciences
Annika Kurzmann, Yaakov Kleeorin, Chuyao Tong, Rebekka Garreis, Angelika Knothe, Marius Eich, Christopher Mittag, Carolin Gold, Folkert Kornelis de Vries, Kenji Watanabe, Takashi Taniguchi, Vladimir Fal'ko, Yigal Meir, Thomas Ihn, Klaus Ensslin
Summary: The study explores the interplay between spin-orbit interaction and the Kondo effect, revealing the possibility of underscreened Kondo effects in bilayer graphene quantum dots. Unlike carbon nanotubes, a different experimental platform is employed to investigate Kondo physics in a planar carbon material.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
R. M. Dubrovin, N. Siverin, M. A. Prosnikov, V. A. Chernyshev, N. N. Novikova, P. C. M. Christianen, A. M. Balbashov, R. Pisarev
Summary: The lattice dynamics studies of the honeycomb antiferromagnetic ilmenite CoTiO3 single crystal were conducted using polarized infrared, Raman, and dielectric spectroscopic techniques, supplemented by DFT calculations. Unique identification of infrared- and Raman-active phonons was achieved, and the dielectric permittivity showed distinct changes due to the spontaneous magnetodielectric effect. These results establish a solid basis for further investigations into the coupling of phonons with spins and magnetic excitations in this promising material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
Xinrui Lei, Luping Du, Xiaocong Yuan, Qiwen Zhan
Summary: Photonic skyrmions and merons are topological quasiparticles with nontrivial electromagnetic textures, which have great potential in manipulating light-matter interactions and deep-subwavelength imaging. In this study, the topological stability of photonic spin meron lattices is demonstrated by inducing a perturbation to break the C4 symmetry, revealing the metastability of photonic meron. The spin topology is verified through the interference of plasmonic vortices with a broken rotational symmetry, providing new insights into optical topological quasiparticles.
Article
Physics, Condensed Matter
Archana Kumari, C. Dhanasekhar, Praveen Chaddah, D. Chandrasekhar Kakarla, H. D. Yang, Z. H. Yang, B. H. Chen, Y. C. Chung, A. K. Das
JOURNAL OF PHYSICS-CONDENSED MATTER
(2020)
Article
Materials Science, Multidisciplinary
J. Krishnamurthy, A. Venimadhav
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Arnab Pal, Manu Mohan, Adyam Venimadhav, Pattukkannu Murugavel
PHYSICAL REVIEW MATERIALS
(2020)
Article
Chemistry, Physical
S. Janakiraman, Mohammed Khalifa, Rasmita Biswal, Sudipto Ghosh, S. Anandhan, A. Venimadhav
JOURNAL OF POWER SOURCES
(2020)
Article
Engineering, Electrical & Electronic
Rupali Singh, S. Janakiraman, Mohammed Khalifa, S. Anandhan, Sudipto Ghosh, A. Venimadhav, K. Biswas
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2020)
Article
Chemistry, Physical
Debasis Nayak, Sudipto Ghosh, A. Venimadhav
Summary: The study investigates the deposition of NFMO thin films on various substrates using pulsed-laser-deposition technique and explores the influence of deposition temperature on the morphology, electronic state, and electrochemical properties of the films. NFMO thin films deposited on stainless steel substrates exhibit high energy storage performance under different deposition conditions.
Article
Physics, Applied
Rajesh R. Kumar, J. Krishnamurthy, J. Arout Chelvane, A. Venimadhav
Summary: The study demonstrates the characteristics of exchange bias phenomenon through preparing heterostructures and focusing on the interface spin structure, especially the spontaneous phenomena at low temperatures.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Condensed Matter
G. D. Dwivedi, S. M. Kumawat, Tsung-Wen Yen, C. W. Wang, D. Chandrasekhar Kakarla, Amish G. Joshi, H. D. Yang, Shin-Ming Huang, H. Chou
Summary: The study reveals the presence of a magneto-dielectric coupling in Mn1.5Cr1.5O4, which is attributed to changes in structural parameters caused by internal magnetism rather than a structural transition. Magneto-striction plays a key role as a link between magnetic and dielectric properties.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Physics, Condensed Matter
Gourab Bhattacharya, N. Vijay Prakash Chaudhary, Tapasendra Adhikary, Shampa Aich, A. Venimadhav
Summary: This study investigated electron transport across Galfenol and Nickel-based Schottky contacts on n-Si substrates through DC current-voltage measurements and AC Impedance spectroscopy. Improper back contact can cause additional bias dependent Resistance-capacitance components, which were studied using proper equivalent circuit models. The results showed distinct behavior in capacitance and barrier height, with negative capacitance observed in certain conditions. The use of an equivalent circuit with inductor-resistor relaxation provided a better fit for the experimental results.
SUPERLATTICES AND MICROSTRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Ajay Tiwari, D. Chandrasekhar Kakarla, G. Macam, C. H. Hsu, F. C. Chuang, H. C. Wu, T. W. Kuo, Arkadeb Pal, H. Chou, D. P. Gulo, H. L. Liu, Y. C. Chuang, Y. C. Lai, C. A. Lee, Mitch M. C. Chou, H. D. Yang
Summary: A high-quality NiTe2O5 single crystal was grown and investigated for its higher-order magnetoelectric coupling effect. The study revealed that magnetoelastic coupling plays a critical role in bridging the electrical and magnetic properties in this material, with p-d hybridization being a possible mechanism for the observed effect.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Arkadeb Pal, T. W. Kuo, Chia-Hsiu Hsu, D. Chandrasekhar Kakarla, Ajay Tiwari, M. C. Chou, Atanu Patra, P. Yanda, E. Blundo, A. Polimeni, A. Sundaresan, F. C. Chuang, H. D. Yang
Summary: This study investigates the physical properties of the noncentrosymmetric and quasi-two-dimensional canted antiferromagnetic material CoTeMoO6 (CTMO), revealing a spectrum of intriguing phenomena and the crucial role played by spin canting.
Article
Chemistry, Physical
S. Janakiraman, Ashutosh Agrawal, Rasmita Biswal, A. Venimadhav
Summary: In this study, an electrospun amorphous PVDF-co-HFP based separator was shown to be a superior gel electrolyte material suitable for sodium-ion batteries. The amorphous gel polymer electrolyte (AGPE) displayed high ionic conductivity and wide electrochemical stability, leading to excellent cycling performance in the sodium-ion cell system.
APPLIED SURFACE SCIENCE ADVANCES
(2021)
Article
Materials Science, Multidisciplinary
D. Chandrasekhar Kakarla, Z. H. Yang, H. C. Wu, T. W. Kuo, Ajay Tiwari, W-H Li, C. H. Lee, Y-Y Wang, J-Y Lin, C. K. Chang, B. H. Chen, Chin-Wei Wang, C. A. Lee, Mitch M. C. Chou, H. D. Yang
Summary: Single crystals of alpha-Cu5O2(SeO3)(2)Cl-2 were prepared successfully and studied for their structural, magnetic, thermal, and dielectric properties. The presence of magnetodielectric effect and long-range antiferromagnetic transition were observed.
MATERIALS ADVANCES
(2021)
Proceedings Paper
Materials Science, Multidisciplinary
Gourab Bhattacharya, N. Vijay Prakash Chaudhary, Suman Sekhar Takri, R. Rajesh Kumar, A. Venimadhav
MATERIALS TODAY-PROCEEDINGS
(2020)
Article
Materials Science, Multidisciplinary
H. C. Wu, D. J. Hsieh, T. W. Yen, P. J. Sun, D. Chandrasekhar Kakarla, J. L. Her, Y. H. Matsuda, C. K. Chang, Y. C. Lai, M. Gooch, L. Z. Deng, K. G. Webber, C. A. Lee, Mitch M. C. Chou, C. W. Chu, H. D. Yang
