Article
Engineering, Electrical & Electronic
B. T. Lejeune, Papa Gorgui Birame Gueye, Diego Archilla Sanz, Elena Navarro, Manuel Vazquez, Rafael Perez del Real, Laura H. Lewis, Pilar Marin
Summary: Glass-coated amorphous ferromagnetic microwires with variations in mass loading and parallel wire arrays show exceptional magnetomechanical and wireless giant magnetoimpedance (GMI) responses in different frequency ranges. These microwires have the ability to wirelessly quantify microgram mass differences, with a sensitivity response higher than commercial amorphous magnetic ribbons. Planar arrays of microwires exhibit either constructive or destructive interference compared to single microwire data. The exceptional responsiveness, small diameter, and ease of fabrication highlight the potential of these microwires for various sensor applications.
IEEE SENSORS JOURNAL
(2023)
Article
Automation & Control Systems
Marco Augusto Vasquez-Beltran, Bayu Jayawardhana, Reynier Peletier
Summary: This article explores the use of Preisach operator to describe hysteresis behavior with multidirectional-oriented loops, particularly in advanced materials used for high-precision sensor and actuator systems. The study showcases the richness of the operators capable of producing intricate loops.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2022)
Article
Chemistry, Physical
M. G. Nematov, V. Kolesnikova, S. A. Evstigneeva, J. Alam, N. A. Yudanov, A. A. Samokhvalov, N. Andreev, S. V. Podgornaya, I. Soldatov, R. Schaefer, V. Rodionova, L. V. Panina
Summary: The effect of heat treatment near the crystallization onset on Co-based amorphous microwires was investigated for micromagnetic structure, magnetostriction, and magnetoimpedance. The hysteresis loops of the microwires changed shape as the annealing temperature approached the crystallization temperature, producing unique magnetic properties. The formation of an easy anisotropy direction was confirmed, and the origin of this anisotropy was found to be different from that induced by current annealing below the Curie temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Krzysztof Chwastek, Mariusz Najgebauer, Pawel Jablonski, Tomasz Szczegielniak, Dariusz Kusiak, Branko Koprivica, Marko Rosic, Srdan Divac
Summary: A description of magnetic hysteresis is crucial for predicting losses in soft magnetic materials. This study utilizes a viscosity-type equation to model dynamic hysteresis loops in amorphous ring cores under symmetric excitation. The results demonstrate the significant role of viscosity-type effects, primarily caused by eddy currents, in energy dissipation at higher excitation frequencies. This modeling approach is valuable for magnetic circuit designers.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
V. Zhukova, M. Churyukanova, S. Kaloshkin, P. Corte-Leon, M. Ipatov, A. Zhukov
Summary: The magnetostriction coefficient and its stress dependence are investigated in Co- and Fe-Ni-based glass-coated microwires. It is found that the hysteresis loops and magnetostriction coefficients are mostly determined by the chemical composition of the metallic nucleus. The stress dependence of the magnetostriction coefficient is linear for both types of microwires, but with opposite trends for Co-rich and Fe-Ni-rich microwires. The annealing process also affects the magnetostriction coefficient.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Wei Liu, Hui Yang, Heyun Lin, Xiping Liu
Summary: This study investigates the inherent relationship between the properties of low-coercive-force permanent magnets (PMs) and the electromagnetic characteristics of variable flux memory machines (VFMM) using a combined solution integrated with magnetic equivalent circuit (MEC) and graphical methods. The study models and analyzes the magnetization properties using simplified mathematical models, and qualitatively analyzes the characteristics of VFMM using a newly developed coupled approach.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Automation & Control Systems
Dmitry Egorov, Ilya Petrov, Juha J. Pyrhonen, Joosep Link, Raivo Stern, Peter Sergeant, Bulent Sarlioglu
Summary: This study assesses the hysteresis behavior of two NdFeB PM grades with different magnetic properties in a PMSM. The results indicate that hysteresis loss resulting from structural imperfections and magnet geometry may introduce considerable loss in NdFeB PMs applied in rotating electrical machines.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Chemistry, Analytical
Valentina Zhukova, Paula Corte-Leon, Juan Maria Blanco, Mihail Ipatov, Lorena Gonzalez-Legarreta, Alvaro Gonzalez, Arcady Zhukov
Summary: Amorphous magnetic microwires are suitable for technological applications due to their excellent magnetic softness and giant magnetoimpedance (GMI) effect. This article provides an overview of several approaches for optimizing the soft magnetic properties and GMI effect of magnetic microwires, and suggests that appropriate heat treatment can further improve the performance.
Article
Engineering, Electrical & Electronic
Simon John Greaves, Yasushi Kanai
Summary: Hysteresis loops of single grains and recording media were calculated under the influence of high-frequency (HF) magnetic fields, similar to those produced by a spin-torque oscillator (STO) in microwave-assisted magnetic recording (MAMR). The effect of the HF field ellipticity and the strength of magnetostatic interactions between grains were investigated. Elliptical HF fields with a major:minor axis ratio of 6:1 were almost as effective as circular HF fields in reducing the media coercivity. For media with a small grain pitch, i.e., strong magnetostatic interactions between grains, the HF field was able to reduce the coercivity by much more than when the grains were far apart, and magnetostatic interactions were weak.
IEEE TRANSACTIONS ON MAGNETICS
(2023)
Article
Materials Science, Multidisciplinary
M. Makarova, Y. Akaishi, Y. Suzuki, K. S. Rao, S. Yoshimura, H. Saito
Summary: The A-MFM technique developed in this work utilizes a tip coated with a thin amorphous Fe-B film to improve spatial resolution, achieving localized magnetization reversal via inverse magnetostrictive effect. By using frequency modulation to detect magnetic force near the sample surface, it is suitable for imaging perpendicular magnetic recording media.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Zhiliang Liu, Shunqi Liu, Chuan Xie, Guanghan Bai
Summary: This study proposes an improved method for accurate force measurement on steel wire rope based on maximal induction voltage, which reduces the impact of noise and shows better performance. The new method outperforms the integration of induction voltage method in terms of linearity and sensitivity, as demonstrated in experimental results.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Rui Xiao, Yao Wang, Qi Guo, Ning Xiao, Lei Chen
Summary: The study explores the butterfly-shaped hysteresis giant magnetoimpedance effect in a self-biased magnetic heterogeneous laminate, demonstrating the modulation of permeability in Fe25Ni54Co15Si1B5 ribbon by neighboring Ni ribbon for multilevel remanent magnetoimpedance. This can be useful for nonvolatile multistate memory application, with the possibility of implementing 16 complete nonvolatile Boolean logic functions in a single GMI device.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Chemistry, Physical
Eduard Monaico, Vadim Morari, Maksim Kutuzau, Veaceslav V. Ursaki, Kornelius Nielsch, Ion M. Tiginyanu
Summary: Uniform nanogranular NiFe layers with different Ni contents were fabricated through electroplating on planar substrates and arrays of nanowires. The magnetic properties of these layers were analyzed to evaluate their potential applications.
Article
Chemistry, Physical
Ramany Revathy, Nandakumar Kalarikkal, Manoj Raama Varma, Kuzhichalil Peethambharan Surendran
Summary: In this study, magnetoelectric composites of Fe3O4 and BaTiO3 were synthesized with 0-3 and 1-3 connectivity, showing the presence of exchange bias and an increasing trend of magnetoelectric coupling coefficients with higher BaTiO3 content in the investigated samples.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Keli Zhao, Peng Pang, Jian Luo, Binghe Ma, Wei Gao, Jinjun Deng
Summary: In this article, an annealing method is proposed to optimize the coercivity and magnetization of deposited Terfenol-D film for its application in weak magnetic sensors. The magnetization can be improved by releasing compressive stress and increasing saturation magnetization. The coercivity decreases and then sharply increases with the annealing temperature due to partial crystallization. The annealed film with low coercivity of 12.6 Oe and high magnetization of 0.29 emu/g at 525°C can enhance the application of Terfenol-D in weak magnetic sensors.
IEEE TRANSACTIONS ON MAGNETICS
(2023)
Article
Nanoscience & Nanotechnology
M. Salaheldeen, M. Ipatov, V. Zhukova, A. Garcia-Gomez, J. Gonzalez, A. Zhukov
Summary: In this article, the effect of annealing and the applied magnetic field on the magnetic behavior of Co2FeSi glass-coated microwires with ordered L2(1) structure prepared by Taylor-Ulitovsky technique was studied. The as-prepared and annealed samples exhibited ferromagnetic behavior in the measured temperature and magnetic field range. The annealed sample showed higher magnetization ratio, coercivity, and anisotropy field compared to the as-prepared sample. Irreversibility was observed in the annealed sample at lower magnetic fields, while it was absent in the as-prepared sample due to the mixed amorphous and crystalline structure. Increasing the magnetic field resulted in a gradual change in the magnetic behavior, with the irreversibility disappearing at a magnetic field of about 1 kOe.
Article
Chemistry, Physical
M. Salaheldeen, A. Garcia-Gomez, P. Corte-Leon, A. Gonzalez, M. Ipatov, V. Zhukova, J. Gonzalez, R. Lopez Anton, A. Zhukov
Summary: In this study, it was shown that the magnetic and structural properties of Ni2FeSi glass-coated microwires are strongly affected by the annealing conditions. Annealing increased the crystalline phase content and changed the hysteresis loop shape. The annealed samples also exhibited higher coercive and magnetic anisotropy fields, while the as-prepared samples showed reduced remanence. The temperature dependence of the coercivity was anomalous for both as-prepared and annealed samples. These results indicate the sensitivity of Heusler-based glass-coated microwires to temperature and annealing conditions, suggesting potential applications in spintronic devices and sensing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
P. Corte-Leon, I. Skorvanek, F. Andrejka, V. Zhukova, J. M. Blanco, M. Ipatov, A. Zhukov
Summary: The temperature dependence of hysteresis loops and Giant magnetoimpedance (GMI) effect in amorphous FeSiBC microwires were studied. As-prepared microwires showed an improvement in GMI ratio and a modification in hysteresis loops with increasing temperature. The changes observed were almost completely reversible. In contrast, stress-annealed microwires exhibited a substantial improvement in GMI ratio, but a decrease in GMI effect with increasing temperature. The observed results were discussed in terms of relaxation of internal stresses, Hopkinson effect, and modification of thermal expansion coefficients.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
P. Corte-Leon, I. Skorvanek, F. Andrejka, V. Zhukova, J. M. Blanco, M. Ipatov, A. Zhukov
Summary: The giant magnetoimpedance (GMI) effect and magnetic properties of as-prepared and stress-annealed amorphous Fe75B9Si12C4 glass-coated microwires produced by the Taylor-Ulitovsky technique are analyzed with temperature influence. Remarkable changes in hysteresis loops and GMI effect are observed upon heating. Tuning the stress-annealing conditions allows for the variation of the temperature dependence. Furthermore, the changes induced by temperature are almost completely reversible.
Article
Nanoscience & Nanotechnology
A. Garcia-Gomez, P. Corte-Leon, M. Ipatov, V. Zhukova, J. Gonzalez, A. Fert, A. Alonso, E. Gomez, A. Zhukov
Summary: This article evaluates the feasibility of using glass coated magnetic microwires as a substitute for optical fiber devices in structural health monitoring in the railway industry. The impact of applied stress on hysteresis loops of Fe71.80B13.27Si11.02Nb2.99Ni0.92 and Co65.34Si12.00B10.20Cr8.48Fe3.90Mo0.08 microwires has been investigated and analyzed. An interpolation function has been derived to relate the coercitivity Hc with the applied stress.
Article
Materials Science, Multidisciplinary
Mohamed Salaheldeen, Mihail Ipatov, Paula Corte-Leon, Valentina Zhukova, Arcady Zhukov
Summary: In this study, we investigated the effect of annealing on the magnetic behavior of Co2MnSi-based Heusler microwires. The annealing temperature was set at 1023 K for 2 hours, and annealing above this temperature would damage the glass coating. Both annealed and as-prepared samples showed strong in-plane magnetocrystalline anisotropy, and the coercivity of the annealed sample was four times higher than that of the as-prepared sample. Interestingly, both samples exhibited stable coercivity behavior with temperature. The annealed sample displayed sharp irreversible magnetic behavior at a blocking temperature of 220 K, while the as-prepared sample had a blocking temperature of 150 K. The unusual and irreversible magnetic behavior was attributed to the internal mechanical stress induced during fabrication and the stress relaxation caused by annealing.
Editorial Material
Engineering, Chemical
Arcady Zhukov, Sergei Alexandrov, Valeria Rodionova, Valentina Zhukova
Article
Chemistry, Physical
V. Zhukova, M. Churyukanova, S. Kaloshkin, P. Corte-Leon, M. Ipatov, A. Zhukov
Summary: The magnetostriction coefficient and its stress dependence are investigated in Co- and Fe-Ni-based glass-coated microwires. It is found that the hysteresis loops and magnetostriction coefficients are mostly determined by the chemical composition of the metallic nucleus. The stress dependence of the magnetostriction coefficient is linear for both types of microwires, but with opposite trends for Co-rich and Fe-Ni-rich microwires. The annealing process also affects the magnetostriction coefficient.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Alvaro Gonzalez, Alfonso Garcia-Gomez, Valentina Zhukova, Paula Corte-Leon, Mihail Ipatov, Juan Maria Blanco, Julian Gonzalez, Arcady Zhukov
Summary: This study investigates the effects of conventional annealing and Joule heating on the magnetic domain wall dynamics and giant magnetoimpedance (GMI) effect in Fe-rich microwires with different geometries. The results show that magnetic softness, GMI effect, and domain wall dynamics can be substantially improved by appropriate annealing.
Article
Chemistry, Analytical
Alfonso Garcia-Gomez, Juan Maria Blanco, Paula Corte-Leon, Mihail Ipatov, Alvaro Gonzalez, Julian Gonzalez, Arcady Zhukov, Valentina Zhukova
Summary: This article studies the effect of annealing temperature and applied stress on the magnetic properties of Fe71.80B13.27Si11.02Nb2.99Ni0.92 and Co65.34Si12.00B10.20Cr8.48Fe3.90Mo0.08 microwires. An anomalous behavior of the coercive field is observed while applying stress, indicating nontrivial changes in the microwire magnetic anisotropy. The effect of applied stimuli on the magnetic anisotropy and magnetostriction constant in both microwires is also discussed.
Article
Chemistry, Physical
Mohamed Salaheldeen, Asma Wederni, Mihail Ipatov, Valentina Zhukova, Arcady Zhukov
Summary: This study investigates the effect of adding a small amount of carbon to Co2MnSi Heusler alloy-based glass-coated microwires. The newly developed Co2MnSiC alloy shows significant changes in magnetic and structural properties compared to the Co2MnSi alloy. The results suggest that Co2MnSiC has promising magnetic stability and is a potential candidate for magnetic sensing devices.
Article
Materials Science, Multidisciplinary
Alexandr Chizhik, Paula Corte-Leon, Valentina Zhukova, Arcady Zhukov
Summary: This study discovered the previously unobserved effect of bending-annealing-induced magnetic bistability in microwires. The effect is observed only in the region of the sample subjected to bending. The movement of the longitudinal domain wall in the microwire surface accompanies the bending-induced bistability.
MATERIALS TECHNOLOGY
(2023)
