A5069159575- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Advanced Sensor and Energy Harvesting Materials
- Acoustic Wave Resonator Technologies
- Magnetic Properties and Applications
- Smart Materials for Construction
- Mechanical and Optical Resonators
- Metallic Glasses and Amorphous Alloys
- Dielectric materials and actuators
- Magneto-Optical Properties and Applications
- Conducting polymers and applications
- Innovative Energy Harvesting Technologies
- Energy Harvesting in Wireless Networks
- Synthesis and properties of polymers
- Characterization and Applications of Magnetic Nanoparticles
- Dielectric properties of ceramics
- Ultrasound Imaging and Elastography
- Magnetic properties of thin films
- Ultrasonics and Acoustic Wave Propagation
- Electromagnetic wave absorption materials
- Magnetic Field Sensors Techniques
- Shape Memory Alloy Transformations
- Microwave and Dielectric Measurement Techniques
- Theoretical and Computational Physics
- Sensor Technology and Measurement Systems
University of the Basque Country
2014-2024
Basque Center for Materials, Applications and Nanostructures
2013-2015
Euskadiko Parke Teknologikoa
2014
Magnetoelectric nanocomposite films composed of magnetostrictive CoFe 2 O 4 nanoparticles with sizes between 35 and 55 nm embedded in P(VDF-TrFE) have been successfully prepared by a solvent casting method.The ferroelectric, piezoelectric, magnetic magnetoelectric properties the their variation wt% ferrite filler, thickness composite direction applied field investigated.Ferroelectric piezoelectric are improved when small amount were added to polymeric matrix.Magnetic vary linearity...
The effect of the bonding layer type and piezoelectric thickness on magnetoelectric (ME) response layered poly(vinylidene fluoride) (PVDF)/epoxy/Vitrovac composites is reported. Three distinct epoxy types were tested, commercially known as M-Bond, Devcon, Stycast. main differences among them are their different mechanical characteristics, in particular value Young modulus, coupling with polymer Vitrovac (Fe39Ni39Mo4Si6B12) layers laminate. laminated prepared M-Bond exhibit highest ME...
A flexible, low-cost energy-harvesting device based on the magnetoelectric (ME) effect was designed using Fe64Co17Si7B12 as amorphous magnetostrictive ribbons and polyvinylidene fluoride (PVDF) piezoelectric element. 3 cm-long sandwich-type laminated composite fabricated by gluing to PVDF with an epoxy resin. voltage multiplier circuit produce enough charge a battery. The power output density obtained were 6.4 μW 1.5 mW cm−3, respectively, at optimum load resistance measured...
The outstanding properties of selected soft magnetic materials make them successful candidates for building high performance sensors. In this paper we present our recent work regarding different sensing technologies based on the coupling with their electric or elastic properties. first place report influence magneto-impedance response thickness Permalloy films in multilayer-sandwiched structures. An impedance change 270% was found best conditions upon application field, a low field...
Harvesting magnetic energy from the environment is becoming increasingly attractive for being a renewable and inexhaustible power source, ubiquitous accessible in remote locations. In particular, harvesting with polymer-based magnetoelectric (ME) materials meet industry demands of flexible, showing large area potential, lightweight biocompatibility. order to get best process, extraction circuit needs be optimized useful powering devices. This paper discusses design performance five interface...
Acoustic wave based sensors have a major impact in the detection of low concentration biological and chemical agents. Magnetoelastic resonator platforms are particularly interesting due to their cost wireless process. However, efforts improving performance still focused only reduction size. In present study, new way increase sensitivity magnetoelastic sensor is proposed. This work demonstrates, both theoretically experimentally, that mass load can be improved by tailoring geometry position....
The anisotropic magnetoelectric (ME) effect on a Fe61.6Co16.4Si10.8B11.2/PVDF Fe61.6Co16.4Si10.8B11.2 laminate composite has been used for the development of magnetic field sensor able to detect both magnitude and direction AC DC fields. accuracy (99% sensors), linearity (92% 99% sensor) reproducibility sensors) indicate suitability applications. Furthermore, sensitivity Fe61.6Co16.4Si10.8B11.2/PVDF/Fe61.6Co16.4Si10.8B11.2 sensor—15 1400 mV Oe−1 fields, respectively—are highest reported in...
Metallic glass/polyvinylidene fluoride three-layered magnetoelectric laminated composites have been studied. Size effects in the response arisen both from reduction of length laminate and increase operating frequency quantified for lengths ranging 3 cm down to 0.5 cm. It has concluded that decrease this arises mainly demagnetizing effects, with reductions 86% longest up 99% shortest one. From these values, an intrinsic coefficient 325 V/cm Oe obtained.
We report the fabrication by melt spinning, magnetic and magnetoelastic characterization corrosion behaviour study (by potentiodynamic methods) of an Fe-based, Fe-Ni-Cr-Si-B metallic glass to be used as resonant platform for biological chemical detection purposes. The same has been performed in Fe-Co-Si-B (with excellent properties) Fe-Ni-B good properties due substitution Co Ni) composition amorphous alloys. well-known, commercial with high resistance Metglas 2826MB®(Fe40Ni38Mo4B18), widely...
The main parameters of magnetoelastic resonators in the detection chemical (i.e., salts, gases, etc.) or biological bacteria, phages, agents are sensitivity S (or external agent change magnitude per Hz resonance frequency) and quality factor Q resonance. We present an extensive study on experimental determination such resonant platforms, using three different strategies: (a) analyzing real imaginary components susceptibility at resonance; (b) numerical fitting modulus susceptibility; (c)...
Magnetostrictive/piezoelectric hybrid composites have recently attracted renewed interest as high sensitivity sensors and actuators. One of the most common used geometry consists in laminated amorphous magetostrictive metal/piezoelectric layers, maximum magnetoelectric effect has been found at electromechanical resonance system. Here we present results concerning fabrication such laminate sensor by using Vitrovac 4040 ® (Fe 39 Ni Mo 4 Si 6 B 12 ) magnetostrictive component two different...
A series of amorphous polyimides and copolyimides that contained nitrile were obtained by a two-step procedure. The first step consisted polycondensation reaction 4,4'-oxydiphtalic anhydride (ODPA) with one or two aromatic diamines, namely 1,3-Bis-2-cyano-3-(3-aminophenoxy)phenoxybenzene (diamine 2CN) 1,3-Bis(3-aminophenoxy)benzene 0CN). In the second step, thermal cyclodehydration converted each poly(amic acid) copoly(amic into their corresponding polyimide films. piezoelectric response was...
High magnetoelectric (ME) coefficients at room temperature have been found when 2-2 type laminates (one magnetostrictive, the other piezoelectric) made of iron-based Metglas alloys and PVDF piezoelectric polymer are used. Searching for a good ME response such laminate composites used high temperatures, we modified both constituents: first, by using magnetostrictive 2826 MB (with <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML"...
We present an exhaustive study of the magnetoelastic properties 24 strips with different rectangular dimensions, cut from a long ribbon Metglas® 2826MB3. The have length-to-width ratio R = L/w ranging 2 to over 20. Significant variations apparent saturation Young's modulus and ΔE effect strip geometry, changing 160 GPa 4% for L 10 mm, w 5 mm 2, 164 9.6% 35 1.7 20.6, been observed. In order obtain highest values effect, magnetomechanical coupling coefficient, k, quality factor resonance, Q,...
Among magnetoelectric (ME) heterostructures, ME laminates of the type Metglas-like / PVDF (magnetostrictive+piezoelectric constituents) have shown highest induced voltages, usually detected at magnetoelastic resonance magnetostrictive constituent. This coupling happens because high cross-correlation between and piezoelectric material, is associated with a promising application scenario for sensors or actuators. In this work we detail basis operation such devices, as well some arising...