Article
Chemistry, Physical
Jiakai Miao, Yanzhou Fan, Hailong Li, Xitao Li, Ran Wei, Tan Wang, Shaojie Wu, Fushan Li, Chen Chen
Summary: This study investigates the impact of cooling rate on the soft magnetic properties of amorphous ribbons. It is found that ribbons prepared at a lower cooling rate exhibit better soft magnetic properties. By improving the surface morphology and residual stress of the ribbons, the magnetic structure and properties can be enhanced, making them suitable for applications in electric devices.
Article
Engineering, Electrical & Electronic
Carlos Moron-Fernandez, Amparo Verdu-Vazquez, Tomas Gil-Lopez, Alberto Moron-Barrios
Summary: A new microscope stand has been built for measuring properties and characterizing amorphous magnetic materials under electric current, by measuring infrared radiation for temperature determination. The device is useful for detecting crystallization processes and studying crystal growth and grain recrystallization.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Materials Science, Multidisciplinary
Yimin Guo, Xinchao Wang, Xuan Li, Tao Zhang
Summary: To avoid annealing embrittlement and annealing-induced resistivity drop, the Fe85P11C2B2 amorphous alloy was treated by pulse current (PC) and rolling. The PC processing enhanced atom mobility, resulting in the formation of alpha-Fe nanocrystals and release of internal stress, increasing saturation magnetization (Ms) and reducing coercivity (Hc). Rolling after PC treatment improved sample resistivity (ρ). The synergy of PC + rolling treatment increased Ms from 1.54 T to 1.64 T, enhanced resistivity from 177.1 μΩ·cm to 192.0 μΩ·cm, and decreased Hc from 6.4 A/m to 5.6 A/m. The treated sample maintained good bending ductility.
Article
Chemistry, Physical
Kyle P. Schneider, Yuval L. Krimer, Satoru Simizu, Maarten P. de Boer, Michael E. McHenry
Summary: Improvement of the (Fe70Ni30)(80)B14Nb4Si2 alloy is sought through substitution of Co for Fe and/or Ni. Fifteen alloys in the ((FexNiyCo(100-x-y))(80)B14Nb4Si2 alloy system are fabricated and analyzed for various properties relating to their soft magnetic performance. The most important properties studied here are Bsat, Ht, lambda(s), and Tc.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Aerospace
Jiaxin You, Hao Yu, Huimin Liang, Yong Xie, Ding Ding
Summary: This study investigates the effects of cold extrusion and heat treatment on the grain characteristics and magnetic energy of soft magnetic materials used in aeronautic hermetically-sealed electromagnetic relays (HSERs). By simulating the grain change process at different heat treatment temperatures and establishing correlation models, the study reveals the significant impact of soft magnetic material properties on the static and dynamic characteristics of HSERs. The findings provide valuable insights for optimizing the performance of electromagnetic mechanisms.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Materials Science, Ceramics
Jili Ding, Hongjie Xu, Zhiguang Shi, Xuan Li, Tao Zhang
Summary: The influence of primary alpha-Fe precipitation on thermal and magnetic properties was investigated by producing Fe76.5-xCu1NbxSi13.5B9 (x=0, 1, 2 and 3) amorphous/nanocrystalline ribbons through melt-spinning. It was found that rapid quenching and heat treatment had similar effects on alpha-Fe precipitation. By optimizing components and heat treatment, magnetic properties of the ribbons could be significantly improved.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
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
Materials Science, Ceramics
Jingcheng Lin, Xuelian Li, Shaoxiong Zhou, Qian Zhang, Zongzhen Li, Mingxu Wang, Guibing Shi, Li Wang, Guangqiang Zhang
Summary: The oxidation behavior and soft magnetic properties of industrially prepared Fe80Co3Si3B10P1C3 amorphous cores were investigated under heat treatment in air. Results indicate that heat treatment in air can improve the soft magnetic properties of the cores, resulting in higher permeability and maximum saturation magnetic induction. The improvement is attributed to the formation of a Co-rich layer between the oxide layer and the amorphous substrate. The core loss exhibits different trends depending on the annealing time and conditions.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
XinRu Wu, BenZhen Tang, Qiang Wang, Yong Wu, DongMei Li, Ding Ding, XiaoLong Guo, Lei Xia, Peng Yu
Summary: In this study, Fe83-xB10P4C2Cu1Vx (x = 0, 0.5, 1, 2) amorphous alloys were designed and prepared to enhance the soft magnetic properties. The effects of V addition on thermal stability, soft magnetic properties, and microstructure after annealing were investigated. The results showed that V effectively improved the thermal stability and the annealing process resulted in a composite structure that further enhanced the saturation magnetization and reduced the coercivity.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(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
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
Materials Science, Multidisciplinary
Jonathan D. Miller, Dimitrije Cabarkapa, Matthew J. Hermes, Andrew C. Fry, Cory J. Berkland
Summary: The study evaluated the performance of soft silicone-magnetic powder composites paired with a magnetometer, finding that sensors with smaller diameter cylinder-shaped magnetic elements exhibited a linear response to compression. Soft magnetic elements composed of 80% magnetic powder had the highest sensitivity.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
Wenfeng Zhang, Yang Meng, Jianfeng Wang, Shaokang Guan, Tao Zhang
Summary: This paper investigates a new heat treatment method to inhibit the brittleness caused by annealing in Fe-based amorphous alloys. By using a self-designed continuous rapid annealing equipment, the amorphous precursors were rapidly annealed at 773K for 0.3 s, resulting in the formation of a-Fe phase with a size of 2 to 5 nm. The ribbon sample exhibits high saturation magnetization and low coercivity, as well as good bending ductility.
Article
Robotics
Peter Lloyd, Theodosia Lourdes Thomas, Venkatasubramanian Kalpathy Venkiteswaran, Giovanni Pittiglio, James H. Chandler, Pietro Valdastri, Sarthak Misra
Summary: Soft and flexible magnetic robots made from magnetically-active elastomers have gained attention due to their large deformability and remote actuation capabilities. These properties make them appealing for minimally invasive surgeries, allowing navigation to previously inaccessible areas. However, functionalizing such magnetic devices has been a challenge. To address this, we introduce a proof-of-concept variable stiffness robot controlled by remote magnetic actuation, capable of grasping objects of different sizes. We demonstrate a controlled and reversible high deformation coiling action induced by a transient magnetic field and a nitinol backbone. Experimental demonstrations show a maximum coiling deformation angle of 400 degrees.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2023)
Article
Chemistry, Analytical
Pavel Ripka, Vaclav Grim, Mehran Mirzaei, Diana Hrakova, Janis Uhrig, Florian Emmerich, Christiane Thielemann, Jiri Hejtmanek, Ondrej Kaman, Roman Tesar
Summary: Soft magnetic wires and microwires are commonly used for magnetic sensor cores, contributing to high sensitivity and spatial resolution. The coercivity of nanowire arrays can be controlled by geometry, and finite element simulation is crucial for sensor development.
Article
Infectious Diseases
Chiara Fanciulli, Juan Berenguer, Carmen Busca, Maria J. Vivancos, Maria J. Tellez, Lourdes Dominguez, Pere Domingo, Jordi Navarro, Jesus Santos, Jose A. Iribarren, Luis Morano, Arturo Artero, Javier Moreno, Antonio Rivero-Roman, Ignacio Santos, Livia Giner, Carlos Arminanzas, Marta Montero, Christian Manzardo, Carmen Cifuentes, Coral Garcia, Maria J. Galindo, Oscar L. Ferrero, Jose Sanz, Belen de la Fuente, Carmen Rodriguez, Gabriel Gaspar, Laura Perez, Juan E. Losa, Luis Force, Sergio Veloso, Elisa Martinez-Alfaro, Inmaculada Jarrin, Marta De Miguel, Juan Gonzalez Garcia
Summary: We assessed the prevalence of active HCV infection among people living with HIV (PLWH) in Spain in 2019 and compared the results with those of four similar studies performed during 2015-2018. The prevalence of active HCV infection in PLWH was 2.2% in 2019, which was 90% lower than in 2015.
Article
Chemistry, Analytical
Valentina Zhukova, Paula Corte-Leon, Juan Maria Blanco, Mihail Ipatov, Alvaro Gonzalez, Arcady Zhukov
Summary: In this paper, a gradual change in the hysteresis loop of Co-rich glass-coated microwire stress-annealed at variable temperature is observed. Such microwires annealed with a temperature gradient also present a variable squareness ratio and magnetic anisotropy field along the microwire's length. The obtained graded anisotropy has been attributed to a gradual modification of the domain structure along the microwire originated by a counterbalance between shape, magnetoelastic, and induced magnetic anisotropies. Accordingly, we propose a rather simple route to design graded magnetic anisotropy in a magnetic microwire.
Article
Immunology
Daniel D. Murray, Birgit Grund, Cameron R. MacPherson, Christina Ekenberg, Adrian G. Zucco, Joanne Reekie, Lourdes Dominguez-Dominguez, Preston Leung, Dahlene Fusco, Julien Gras, Jan Gerstoft, Marie Helleberg, Alvaro H. Borges, Mark N. Polizzotto, Jens D. Lundgren
Summary: Genetic variation in the TET2 gene is associated with HIV viral load, particularly in antiretroviral-naive individuals. This finding is crucial for understanding the pathways of HIV-pathogenesis.
Article
Infectious Diseases
Douglas L. Fink, Helen Callaby, Akish Luintel, William Beynon, Helena Bond, Eleanor Y. Lim, Effrossyni Gkrania-Klotsas, Jospeh Heskin, Margherita Bracchi, Balram Rathish, Iain Milligan, Geraldine O'Hara, Stephanie Rimmer, Joanna R. Peters, Lara Payne, Nisha Mody, Bethany Hodgson, Penny Lewthwaite, Rebecca Lester, Stephen D. Woolley, Ann Sturdy, Ashley Whittington, Leann Johnson, Nathan Jacobs, John Quartey, Brendan A. Payne, Stewart Crowe, Ivo A. M. Elliott, Thomas Harrison, Joby Cole, Katie Beard, Tomas-Paul Cusack, Imogen Jones, Rishi Banerjee, Tommy Rampling, Jake Dunning
Summary: The 2022 global mpox outbreak has been unprecedented, with over 67,000 cases reported in non-endemic countries. Although mortality is rare, hospital admission is relatively common. This study found that males, white ethnicity, and HIV-infected patients were more likely to be hospitalized, and severe pain and secondary bacterial infection were the main reasons for admission.
LANCET INFECTIOUS DISEASES
(2023)
Article
Medicine, Research & Experimental
Violeta Lara-Aguilar, Daniel Valle-Millares, Celia Crespo-Bermejo, Sergio Grande-Garcia, Manuel Llamas-Adan, Maria Engracia Cortijo-Alfonso, Luz Martin-Carbonero, Lourdes Dominguez, Pablo Ryan, Ignacio de los Santos, Sofia Bartolome-Sanchez, Erick Joan Vidal-Alcantara, Maria Angeles Jimenez-Sousa, Amanda Fernandez-Rodriguez, Veronica Briz
Summary: This study examined the senescence profiles in people living with HIV who have acute or chronic Hepatitis C. The results showed that the profiles improved after HCV elimination, either spontaneously or with direct-acting antivirals.
BIOMEDICINE & PHARMACOTHERAPY
(2023)
Review
Infectious Diseases
Naomi Fitzgerald, Holly Coltart, Lourdes Dominguez, Kate Flanagan, Yvonne Gilleece
Summary: This systematic review reveals a lack of literature on PrEP for cis and transgender women in Europe, which also indicates a lack of PrEP provision for women in this region. Barriers to PrEP uptake are complex and rooted in institutional and societal stigma, which must be addressed at policy level. Further research into the use of PrEP in cis, pregnant, breastfeeding, and transgender women is essential if we are to stop HIV transmission by 2030.
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.
Article
Engineering, Chemical
Mohamed Salaheldeen, Asma Wederni, Mihail Ipatov, Valentina Zhukova, Arcady Zhukov
Summary: The Taylor-Ulitovsky technique was used to prepare nanocrystalline Co2MnGe Heusler alloy glass-coated microwires with specific magneto-structural characteristics. XRD analysis revealed a defined nanocrystalline structure with unique phases. The magnetic properties were influenced by internal stresses and showed anomalous behavior compared to other glass-coated microwires. These microwires have potential applications due to their ferromagnetic behavior and high order.
Article
Virology
Violeta Lara-Aguilar, Celia Crespo-Bermejo, Manuel Llamas-Adan, Sergio Grande-Garcia, Maria Engracia Cortijo-Alfonso, Luz Martin-Carbonero, Lourdes Dominguez, Pablo Ryan, Ignacio de los Santos, Sofia Bartolome-Sanchez, Daniel Valle-Millares, Maria Angeles Jimenez-Sousa, Veronica Briz, Amanda Fernandez-Rodriguez
Summary: Coinfection with HCV and HIV leads to immune activation, inflammation, oxidative stress, and premature senescence. Chronic HCV infection in PLWHIV is associated with increased nitrate concentration and secretion of senescence-associated factors.
JOURNAL OF MEDICAL VIROLOGY
(2023)
Article
Genetics & Heredity
Victoria Cairoli, Daniel Valle-Millares, Maria C. Terron-Orellano, Daniel Luque, Pablo Ryan, Lourdes Dominguez, Luz Martin-Carbonero, Ignacio De los Santos, Elena De Matteo, Beatriz Ameigeiras, Veronica Briz, Paola Casciato, Maria Victoria Preciado, Pamela Valva, Amanda Fernandez-Rodriguez
Summary: This study characterizes the plasma-derived extracellular vesicles miRNA signature of chronic HCV infected and HIV coinfected patients, revealing potential molecular mechanisms of coinfection. The study identifies differentially expressed miRNAs that regulate biological pathways related to HCV and HIV pathogenesis, which may assist in the development of new biomarkers and treatment strategies.
JOURNAL OF MOLECULAR MEDICINE-JMM
(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
Crystallography
Mohamed Salaheldeen, Valentina Zhukova, Mihail Ipatov, Arcady Zhukov
Summary: In this study, Ni2FeSi-, Co2FeSi-, and Co2MnSi-based full-Heusler alloy glass-coated microwires with the same geometric parameters were prepared and their crystal structure and magnetic properties were analyzed. The results showed that the change of chemical composition significantly affected the lattice cell parameters, average grain size, and magnetic behavior of the samples. The study also revealed the tunability of magnetic properties in X(2)YZ MWs by controlling their structure at fixed geometric parameters. Based on these findings, X(2)YZ MWs have potential applications in sensing.
Article
Chemistry, Inorganic & Nuclear
Valentina Zhukova, Alfonso Garcia-Gomez, Alvaro Gonzalez, Margarita Churyukanova, Sergey Kaloshkin, Paula Corte-Leon, Mihail Ipatov, Jesus Olivera, Arcady Zhukov
Summary: In this study, we investigated the magnetostriction coefficients and Curie temperature of Fe47Ni27Si11B13C2 and Co67Fe3.9Ni1.5B11.5Si14.5Mo1.6 glass-coated microwires under different annealing conditions. The results showed that the magnetostriction coefficients are linearly dependent on the applied stress, with opposite responses observed for different materials. Additionally, annealing had a similar effect on both the magnetostriction coefficients and Curie temperature of the studied microwires.
Meeting Abstract
Infectious Diseases
Laura Ribeiro Cechin, Lourdes Dominguez, Lucy Campbell, Lisa Hamzah, Julie Fox, Royce Vincent, Louise Goff, Frank Post
