Using a planar microstrip transmission line, the dipolar interactions in electrodeposited Ni nanowires arrays are characterized as function of membrane porosity (4% to 38%) and wire diameter (56 250 nm). The between wires can be modeled mean-field approach an effective uniaxial anisotropy field oriented perpendicular axis proportional porosity. interaction opposes self-demagnetization isolated single which keeps magnetization parallel axis. An increase therefore induces switching easy from...

The effects of the electrolytic bath acidity, or pH, on magnetic properties in arrays electrodeposited Co nanowires and their correlation with crystalline have been studied using ferromagnetic resonance. results show that, depending value pH electrolyte, appreciable changes effective anisotropy can be induced. These are attributed to modifications microstructure nanowires. In particular, quantification field shows that deposited wires set contain a dominant fraction Co-hcp phase c-axis...

In this letter we present a convenient way of controlling the direction uniaxial magnetocrystalline anisotropy in arrays electrodeposited hcp Co nanowires. Combining electron microscopy and ferromagnetic resonance measurements, it is shown that using an appropriate pH electrolytic solution, c axis can be oriented parallel or perpendicular to wires axes simply by changing deposition current density rate. This reorientation leads drastic change overall magnetic as crystal either competes for...

Track etched polycarbonate membranes produced using a double energetic heavy ion irradiation with fixed incidence angles as templates to fabricate crossed magnetic nanowire networks tunable anisotropy and microwave absorption properties.

Abstract Oil spills represent a significant environmental challenge, requiring materials that are efficient, cost-effective, and reusable for oil-water separation. This study presents scalable method fabricating magnetic polydimethylsiloxane (PDMS) microspheres using commercially available oil-based ferrofluid. The choice of ferrofluid simplifies synthesis by providing pre-dispersed superparamagnetic nanoparticles, ensuring compatibility with PDMS. ferrofluid-PDMS mixture was emulsified in...

Using low density arrays of bistable magnetic nanowires as a model dipolar system, it is shown that the interaction field coefficient can be measured from remanence curves well other functions isothermal remanent magnetization and DC demagnetization obtained an affine transformation Wohlfarth relation. Based on mean arguments, these measurements are used to subtract remove contribution configuration dependent major loop curves. The corrected first obtain intrinsic switching distribution...

The microwave absorption properties of arrays magnetic nanowires electrodeposited in nanoporous membranes have been studied using a strip transmission line configuration. From the measurements, ferromagnetic resonance wires extracted at frequencies ranging from 100 MHz to 40 GHz for various angles between wire axis and an external static field up 8 kOe. We report on extensive data obtained Ni, NiFe, NiFeCo alloys with diameters packing densities. In such arrays, apart shape anisotropy,...

Magnetic nanocontacts have been prepared by a templating method that involves the electrodeposition of Ni within pores track-etched polymer membranes. The are made at extremity single nanowire either inside or outside pores. is simple, flexible, and controllable as width constriction can be varied reversibly controlling potential between electrodeposited ferromagnetic electrode. At room temperature, electrical conductance shows quantization steps in units e2/h, expected for metals without...

We present an experimental investigation of a class microwave photonic band-gap (PBG) materials, in which the magnetic permeability μ varies periodically within material. This material is fabricated using periodic arrangement arrays nanowires. As for dielectric or metallic PBG, behavior with geometrical parameters fixing spatial periodicity structure. The band gap induced by presence ferromagnetic resonance effect vicinity gap.

A simple and nonexpensive adapted dip-coating technique is presented used to fabricate arrays of magnetic nanowires with a linear varying height profile. This approach allows controlling the wire from tenths nanometers up several micrometers. Furthermore, main parameters this gradient can be controlled, such as maximum lateral span array, which predicted excellent accuracy using proposed analytical model. Moreover, we show that by sequential electrodeposition dip-coating, these wires grown....

The zero-field microwave absorption, or natural ferromagnetic resonance, spectra in arrays of electrodeposited magnetic nanowires is studied as a function the saturation magnetization NiCu, NiFe, CoNiFe, and CoFe alloys several compositions. Measurements show that due to shape anisotropy, these systems present strong absorption peaks absence an applied field GHz range resonance. Furthermore, resonance frequency observed be independent wire diameter density well history its value depends only...

A mean field model is presented for the configuration dependent effective demagnetizing and anisotropy fields in assemblies of exchange decoupled magnetic particles arbitrary shape which are expressed terms factors volumetric containing assembly. Perpendicularly magnetized two-dimensional (2D) have been considered, it shown that lower than continuous thin film. As an example these 2D systems, arrays bistable cylindrical nanowires characterized by remanence curves as well ferromagnetic...

The dipolar interaction field in arrays of nickel nanotubes has been investigated on the basis expressions derived from effective demagnetizing assembly as well magnetometry measurements. model incorporates explicitly wall thickness and aspect ratio, spatial order nanotubes. experiment show that is smaller than solid nanowires due to packing fraction reduction tubes related their inner cavity. Finally, good agreement between found for variation a function tube thickness.

We have explored the interplay between magnetic and magneto-transport properties of 3D interconnected nanowire networks made various metals by electrodeposition into nanoporous membranes with crossed channels controlled topology. The close relationship their structural has a direct impact on behavior. In order to accurately reliably describe effective anisotropy anisotropic magnetoresistance, an analytical model inherent topology is proposed validated. feasibility obtain responses in network...