Hexagonal ferrites: A review of the synthesis, properties and applications of hexaferrite ceramics

https://www.andrew.cmu.edu/user/dl0p/laughlin/pdf/PMS.pdf

Amorphous and nanocrystalline materials for applications as soft magnets

https://shell.cas.usf.edu/~phanm//PMS.pdf

Giant magnetoimpedance materials: Fundamentals and applications

The special mechanical properties of nanoparticles allow for novel applications in many fields, e.g., surface engineering, tribology and nanomanufacturing/nanofabrication. In this review, the basic physics of the relevant interfacial forces to nanoparticles and the main measuring techniques are briefly introduced first. Then, the theories and important results of the mechanical properties between nanoparticles or the nanoparticles acting on a surface, e.g., hardness, elastic modulus, adhesion and friction, as well as movement laws are surveyed. Afterwards, several of the main applications of nanoparticles as a result of their special mechanical properties, including lubricant additives, nanoparticles in nanomanufacturing and nanoparticle reinforced composite coating, are introduced. A brief summary and the future outlook are also given in the final part. (Some figures may appear in colour only in the online journal)

https://iopscience.iop.org/article/10.1088/0022-3727/47/1/013001/pdf

Mechanical properties of nanoparticles: basics and applications

Amorphous glass-covered magnetic wires: Preparation, properties, applications

The Taylor–Ulitovski technique was employed for fabrication of tiny ferromagnetic amorphous and nanocrystalline metallic wires covered by an insulating glass coating with magnetic properties of great technological interest. A single and large Barkhausen jump was observed for microwires with positive magnetostriction. Negative magnetostriction microwires exhibited almost unhysteretic behavior with an easy axis transverse to the wire axis. Enhanced magnetic softness (initial permeability, μι, up to 14000) and giant magneto impedance (GMI) effect (up to 140% at 10 MHz) was observed in amorphous CoMnSiB microwires with nearly zero magnetostriction after adequate heat treatment. Large sensitivity of GMI and magnetic characteristics on external tensile stresses was observed. Upon heat treatment, FeSiBCuNb amorphous microwires devitrificated into a nanocrystalline structure with enhanced magnetic softness. The magnetic bistability was observed even after the second crystallization process (increase of switching field by more than 2 orders of magnitude up to 5.5 kA/m). Hard magnetic materials were obtained as a result of decomposition of metastable phases in Co–Ni–Cu and Fe–Ni–Cu microwires fabricated by Taylor–Ulitovski technique when the coercivity increased up to 60 kA/m. A magnetic sensor based on the magnetic bistability was designed.

Microwires coated by glass: A new family of soft and hard magnetic materials

Magnetostriction in glass-coated magnetic microwires

Here, we present experimental evidence for the very fast domain wall in microwires that can reach wall-motion velocity approaching $18.5\phantom{\rule{0.3em}{0ex}}\mathrm{km}∕\mathrm{s}$, which is much higher than the sound velocity in the magnetic wires. We show that the domain wall speed can be adjusted by counterbalancing between the longitudinal magnetic anisotropy leading to small damping and the strong transversal anisotropy.

Supersonic domain wall in magnetic microwires

Trends in optimization of giant magnetoimpedance effect in amorphous and nanocrystalline materials

The magnetoelastic sensor based on the stress dependence of the GMI effect in Co 68.5 Mn 6.5 Si 10 B 15 amorphous microwire has been introduced. This amorphous microwire after adequate heat treatment shows the maximum GMI ratio (Δ Z / Z ) m up to around 130%. GMI effect of this microwire has been found to be affected by the magnetoelastic anisotropy induced in the sample by the applied tensile stress. This stress dependence of the GMI induces changes on the ac voltage measured between the ends of the sample placed in the magnetic field under applied tensile stress. When the sample is under a load of 3 g such change of the ac voltage across the microwire is about 3.5 V.

J.M. Blanco

Papers

Microwires coated by glass: A new family of soft and hard magnetic materials

Magnetostriction in glass-coated magnetic microwires

Supersonic domain wall in magnetic microwires

Trends in optimization of giant magnetoimpedance effect in amorphous and nanocrystalline materials

Magnetoelastic sensor based on GMI of amorphous microwire