Article
Chemistry, Physical
Qizhong Zhao, Fanghua Tian, Tieyan Chang, Kaiyan Cao, Dingchen Wang, Yin Zhang, Chao Zhou, Xiaoqin Ke, Wenliang Zuo, Yu Wang, Sen Yang, Xiaoping Song
Summary: In this study, the magnetization reversal phenomenon in the Ni20Mn3B6 alloy was investigated at low applied fields, revealing two compensation temperatures. The first temperature is attributed to competition between Mn atoms at different positions, while the second arises from moment rotation to satisfy Zeeman energy. This phenomenon enables tunable switching of magnetization between positive and negative values, providing potential applications in spintronic devices and magnetic storage materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Multidisciplinary
Christos Thanos, Ioannis Panagiotopoulos
Summary: Micromagnetic simulations are used to study resonances and microwave assisted magnetic switching (MAS) in two-phase Co/CoPt nanowires. The nucleation, interfacial domain wall pinning, and propagation processes are well distinguished and play a role in the system. The coupling strength varies to cover different hysteresis curves. Interfacial resonances play an important role in MAS, allowing for optimal conditions with low MAS frequencies and dc applied fields while balancing low field usage and short reversal time.
Article
Chemistry, Physical
E. Berganza, J. Marques-Marchan, C. Bran, M. Vazquez, A. Asenjo, M. Jaafar
Summary: The presence of Bloch skyrmion-tubes as an intermediate stage during magnetization reversal process in diameter-modulated cylindrical nanowires has been experimentally evidenced. The existence of skyrmion-tubes is related to the geometrical dimensions of the nanowire segments, which can be verified through advanced Magnetic Force Microscopy modes.
Article
Materials Science, Ceramics
Komal Kanwar, Bo -Ren Chen, Yung-Kang Kuo, Neeraj Panwar
Summary: SmCr0.85Mn0.15O3 (SCMO) nanoparticles with Pnma space group were synthesized and exhibited structural distortion and semiconducting nature. The nanoparticles had a larger distortion and higher optical bandgap compared to the bulk compound. They also showed higher absorption and stable magnetic switching behavior. These properties make them suitable for optoelectronic, photovoltaic, and magnetic switching applications.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Javier Garcia, Jose A. Fernandez-Roldan, Roque Gonzalez, Miguel Mendez, Cristina Bran, Victor Vega, Silvia Gonzalez, Manuel Vazquez, Victor M. Prida
Summary: Magnetic nanomaterials are being explored for various applications, with the modulation of nanostructures showing potential for affecting magnetization reversal dynamics. In the case of diameter modulated Fe67Co33 nanowires, the magnetization reversal process is observed to occur in two distinct steps. This behavior is attributed to micromagnetic modeling, where the wide segment of the nanowire reverses magnetization first, followed by the core and narrow segment simultaneously.
Article
Chemistry, Physical
I-Hsuan Kao, Ryan Muzzio, Hantao Zhang, Menglin Zhu, Jacob Gobbo, Sean Yuan, Daniel Weber, Rahul Rao, Jiahan Li, James H. Edgar, Joshua E. Goldberger, Jiaqiang Yan, David G. Mandrus, Jinwoo Hwang, Ran Cheng, Jyoti Katoch, Simranjeet Singh
Summary: This paper demonstrates the experimental realization of field-free deterministic magnetic switching using the out-of-plane antidamping spin-orbit torque in the quantum material WTe2, and confirms this phenomenon through numerical simulations. This is of great importance for next-generation spintronic applications.
Article
Materials Science, Multidisciplinary
Sergei M. Vlasov, Grzegorz J. Kwiatkowski, Igor S. Lobanov, Valery M. Uzdin, Pavel F. Bessarab
Summary: This study demonstrates that the energy cost of spin-orbit torque induced reversal in a nanomagnet can be reduced by shaping the current pulse. Optimal switching pulses with minimized energy cost due to joule heating are derived analytically, considering reversal time and material properties. The study finds a sweet-spot balance between the fieldlike and dampinglike components of spin-orbit torque, allowing for efficient switching using a down-chirped rotating current pulse.
Article
Materials Science, Multidisciplinary
Akhila Priya Kotti, Rahul Sahu, Amaresh Chandra Mishra
Summary: The magnetization reversal mechanism and stable remanent states of truncated conical nanowires with high aspect ratio are investigated using micromagnetic simulation. The axial magnetization reversal is mainly driven by domain wall motion, which is hindered by increasing tapering of the nanowire. The remanent state shows a homogeneous magnetization throughout the nanowire, except at the ends where vortex states appear for near cylindrical nanowires and a flower state is exhibited for nanowires with small top radius. The control of magnetization reversal is achieved by restricting the movement of domain wall through a tapered end with flower configuration.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Luis C. C. Arzuza, Victor Vega, Victor M. Prida, Karoline O. Moura, Kleber R. Pirota, Fanny Beron
Summary: Geometrically modulated magnetic nanowires can modify the domain wall propagation, but may be interfered in dense systems, and the magnetic behavior depends on the length/diameter aspect ratio, with magnetization reversal governed by local radial stray fields.
Article
Chemistry, Multidisciplinary
Jai-Lin Tsai, Chun-Yu Sun, Jun-Kai Lin, Gaun-Jhen Huang, Kuan-Cheng Liu, He-Ting Tsai
Summary: BN can diffuse from MgTiOBN intermediate layers during high temperature processes, resulting in higher magnetocrystalline anisotropy and coercivity in FePtCAg films. FePt grains have a granular structure on the MgTiOBN intermediate layer, with some irregular grains being agglomerated and partially separated. The segregation of BN in FePt lattice and the effects of BN segregant on the magnetic switching behavior of FePtCAg films were observed.
Article
Materials Science, Multidisciplinary
Manish Yadav, Chandana Rath
Summary: Nano-crystalline CeCr1-xFexO3 (x = 0 and 0.05) compounds crystallized in orthorhombic structure, with Fe substitution leading to an expansion of lattice parameter and lattice volume. Optical band gap decreased from 2.9 eV to 2.6 eV, while magnetic properties showed changes such as Neel temperature decrease and appearance of peculiar features like compensation temperature and spin reorientation temperature. These properties make the material suitable for magnetic switching and photocatalytic applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Stanislaw Lazarski, Witold Skowronski, Krzysztof Grochot, Wieslaw Powroznik, Jaroslaw Kanak, Marek Schmidt, Tomasz Stobiecki
Summary: The study investigates the spin-orbit torque induced magnetization switching in a CoFeB/Ta/CoFeB trilayer, with modifications in interlayer exchange coupling and magnetic anisotropy axes orientation by varying the thickness of the heavy metal Ta spacer. The control of CoFeB layer magnetization state and the increase in SOT induced critical current density with decreasing Ta spacer thickness are crucial factors in achieving field-free magnetization switching.
Article
Physics, Multidisciplinary
Junwei Tong, Yanzhao Wu, Feifei Luo, Fubo Tian, Xianmin Zhang
Summary: Realization of magnetization reversal by an external electric field is proposed for developing ultra-low-power spintronic devices, with a general design principle introduced based on energy band engineering. The interlayer coupling of HSC/insulator/BMS devices is successfully tuned between ferromagnetic and antiferromagnetic interactions by varying electric field directions, and the nonvolatile magnetization reversal is confirmed. The feasibility of the design strategy is further confirmed by a representative device with the structure of CrBr3/h-BN/2H-VSe2.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2023)
Article
Physics, Multidisciplinary
Naotaka Yoshikawa, Kazuma Ogawa, Yoshua Hirai, Kohei Fujiwara, Junya Ikeda, Atsushi Tsukazaki, Ryo Shimano
Summary: Non-volatile chirality switching is achieved in a ferromagnetic Weyl semimetal via all-optical magnetization reversal, which allows for control of quantum properties in Weyl semimetals.
COMMUNICATIONS PHYSICS
(2022)
Article
Physics, Applied
A. Lobo Guerrero, A. Encinas, E. Araujo, L. Piraux, J. de la Torre Medina
Summary: The crystalline texture of arrays of low diameter Co nanowires synthesized by electrodeposition using electrolytes with different acidities was studied. The switching field distribution (SFD) and first order reversal curve (FORC) diagrams were used to analyze the magnetic behavior and microstructure of the nanowires. The analysis of SFD was complemented and validated with FORC diagram measurements, providing a novel methodology for studying the interplay between microstructure and magnetic behavior of nanowire arrays.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
D. Faurie, F. Zighem, P. Godard, G. Parry, T. Sadat, D. Thiaudiere, P. -O. Renault
Article
Materials Science, Multidisciplinary
Nasima Afsharimani, Bernard Nysten
BULLETIN OF MATERIALS SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
Alain M. Jonas, Ronggang Cai, Romain Vermeyen, Bernard Nysten, Myriam Vanneste, David De Smet, Karine Glinel
MATERIALS & DESIGN
(2020)
Article
Chemistry, Multidisciplinary
Ronggang Cai, Vlad-Andrei Antohe, Bernard Nysten, Luc Piraux, Alain M. Jonas
ADVANCED FUNCTIONAL MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Y. Velazquez-Galvan, J. de la Torre Medina, L. Piraux, A. Encinas
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Yenni G. Velazquez Galvan, Tristan da Camara Santa Clara Gomes, Luc Piraux, Joaquin de la Torre Medina
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2020)
Article
Chemistry, Physical
Yasmina Belaroussi, Gilles Scheen, Abdelhalim A. Saadi, Abdelkader Taibi, Djabar Maafri, Bernard Nysten, Noureddine Gabouze, Jean-Pierre Raskin
SURFACE AND INTERFACE ANALYSIS
(2020)
Article
Multidisciplinary Sciences
Y. G. Velazquez, A. Lobo Guerrero, J. M. Martinez, E. Araujo, M. R. Tabasum, B. Nysten, L. Piraux, A. Encinas
SCIENTIFIC REPORTS
(2020)
Article
Chemistry, Multidisciplinary
Tristan da Camara Santa Clara Gomes, Nicolas Marchal, Flavio Abreu Araujo, Yenni Velazquez Galvan, Joaquin de la Torre Medina, Luc Piraux
Summary: Electrochemical deposition technique allows for the fabrication of mechanically stable three-dimensional magnetic nanostructures with large surface area, providing the possibility to control the geometric characteristics and material composition of interconnected magnetic nanowire or nanotube networks, fine-tuning their magnetic and magneto-transport properties.
Article
Engineering, Mechanical
F. Bahrami, M. Hammad, M. Fivel, B. Huet, C. D'Haese, L. Ding, B. Nysten, H. Idrissi, J. P. Raskin, T. Pardoen
Summary: Graphene reinforcement has been studied for its impact on the mechanical properties of metals, showing earlier and shorter plastic indentation responses compared to systems without graphene. Atomic force microscopy reveals smoother pile-ups with graphene, while transmission electron microscopy shows more diffuse and homogeneous dislocation activity in the presence of graphene. The collective dislocation mechanisms are dominantly controlled by the strong back stress caused by the graphene barrier.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Engineering, Manufacturing
Nathan Klavzer, Sarah F. Gayot, Michael Coulombier, Bernard Nysten, Thomas Pardoen
Summary: Multiscale mechanical modelling aims to predict composite failure from the nanoscale to the macroscopic level. However, existing frameworks are limited by the lack of reliable experimental data and incomplete understanding of submicron deformation and failure mechanisms. A novel digital image correlation (DIC) method has been developed for characterizing the nanoscale mechanical response in composites, using surface patterning. This method has successfully captured strain concentration areas in two different composite systems and results were compared with alternative experimental data and finite element simulations.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Polymer Science
Martial Aime Kuete, Pascal Van Velthem, Wael Ballout, Bernard Nysten, Jacques Devaux, Maurice Kor Ndikontar, Thomas Pardoen, Christian Bailly
Summary: The production of single-use PET bottles, especially in developing countries, has raised concerns about disposal and environmental pollution. A new method has been developed to recycle PET using banana fibers, producing environmentally friendly thermoplastic composites. The modified PET co-polymers show excellent ductility and high stiffness, making them comparable to low-end wood materials. This study lays the foundation for further research on scaling up and application development.
Article
Polymer Science
Martial Aime Kuete, Pascal Van Velthem, Wael Ballout, Nathan Klavzer, Bernard Nysten, Maurice Kor Ndikontar, Thomas Pardoen, Christian Bailly
Summary: The structure and properties of blends of a novel polyethylene terephthalate copolymer (COPET) obtained by chemical recycling of PET with PLLA are investigated. The blends are immiscible and display different morphologies at varying compositions. The addition of flax fibres improves the stiffness and mechanical behavior of the blends. The blends and their composites show excellent interfacial adhesion and demonstrate eco-friendliness based on energy efficiency.
Article
Chemistry, Multidisciplinary
Alessandra Canetta, Sergio Gonzalez-Munoz, Viet-Hung Nguyen, Khushboo Agarwal, Pauline de Crombrugghe de Picquendaele, Yuanzhuo Hong, Sambit Mohapatra, Kenji Watanabe, Takashi Taniguchi, Bernard Nysten, Benoit Hackens, Rebeca Ribeiro-Palau, Jean-Christophe Charlier, Oleg Victor Kolosov, Jean Spiece, Pascal Gehring
Summary: Using Ultrasonic Force Microscopy (UFM), researchers have quantified the variation of out-of-plane Young's modulus in minimally twisted double bilayer graphene (TDBG). They found a softening of the Young's modulus by 7% and 17% along single and double domain walls, respectively. This study highlights the tunability of nanomechanical properties in engineered twisted materials and opens new possibilities for future applications of designer 2D nanomechanical systems.
Article
Astronomy & Astrophysics
Thomas Pardoen, Nathan Klavzer, Sarah Gayot, Frederik Van Loock, Jeremy Chevalier, Xavier Morelle, Vincent Destoop, Frederic Lani, Pedro Camanho, Laurence Brassart, Bernard Nysten, Christian Bailly
Summary: Significant progress has been made in nanomechanical testing and modeling in the past two decades, revealing the properties of materials at micro- and nanoscales. Various testing methods and modeling techniques have enriched the field, but there are still open issues to resolve, particularly in advancing the predictive potential of multiscale modeling for non-linear plasticity and fracture phenomena.
COMPTES RENDUS PHYSIQUE
(2021)
