Magnetic applications

Magnet Applications. For magnets of the type FeNdB, a small amount of gallium is effective in improving the intrinsic coercive force (53). It slows the pinning type recoil loop. The thermal stabiUty is increased. The irreversible loss is less than 1.5% under 373 K (1000 h). 

Magnetic Applications. MetaUic glasses ate utilized ia electric transformers and this provides a significant commercial success for these materials. AUoys such as MetGlas 2605 SC, Feg B 5 i3 5 2 prepared ia sheets having superior soft magnetic properties. These alloys can be magnetized... 

In dc magnetic applications, an air-gap is usually required somewhere along the magnetic path of the core. In ferrite cores, the gap is placed in the center-leg of the core. The flux leaves one end of the core and flows towards the opposing end. The flux, though, repels itself and causes the flux lines to bulge out away from the centerline of the core. The presence of an air-gap creates an area... 

Figure 2.9 Pulse sequence for the INEPT experiment. (B) Effect of pulses on H magnetization. Application of the pulse sequence shown results in population inversion of one of the two proton vectors of the CH doublet and therefore causes an intensification of the corresponding C lines.

Blakely, R., 1996. Potential Theory in Gravity and Magnetic Applications. Cambridge University Press. 

As an example of binary clusters for magnetic applications, we present the study performed on Ni-Co alloy [78]. The Co-Ni phase diagram was investigated by performing sequential ion implantation in silica of Co and Ni at the same energy of ISOkeV (Rp 150nm) but with different fluences in order to have a constant total Co+Ni fluence (15 x lO ions/cm or 30 x 10 ions/cm ). For the 1 1 Co Ni ratio, we also performed sequential implants at... 

Approach to Non-Collinear Magnetism Application to Small Fe Clusters. 

On a smaller scale many new functional polymers are produced having valuable properties for electrical, optical or magnetic applications. There exist numerous metal catalysed processes and we will discuss only a few to explain basic concepts using both examples from bulk polymers and fine chemical, high-value polymers. 

Th serve for storage of information because of their large storage density. The use of gadolinium metal as a heat puitp is a further magnetic application in v ch the Curie Point, v ch lies at room tenperature for this material, can be very well utilized. 

In most DMSs, dopant-host covalencies are the dominant factors governing sp-d exchange energies, which in turn are important for the magnetooptical and magnetic applications of this class of materials. Microscopically, the p-d hybridization in DMSs may be described within perturbation theory as an admixture of valence band character into the dopant 3d wave function (Eq. 12a). 

Electrical and magnetic applications (Yamane etal., 1998 Nishida etal., 1999 Wu et al., 1996)... 

The irreversibility field (Hm), which has to be measured experimentally, is an important parameter since it determines the size of the final M developed. As expected Hm depends upon temperature, and irreversibility field v. temperature curves are shown in Fig. 4.57. It is apparent that at liquid nitrogen temperature YBCO is suited to permanent magnet applications whereas Bi-2223 is not. Because of the energy dissipation accompanying vortex motion and referred to earlier, vortex pinning also raises /c. 

Barium ferrite adequate for certain permanent magnet applications can be prepared from crude mineral iron oxide. A past interest in the material for perpendicular magnetic recording stimulated studies of a variety of chemical routes, including hydrothermal synthesis, to produce powders [12]. 

For magnetic applications, the use of strontium ferrite powder has been characterised (234). The use of barium ferrite has been optimised (362). 

If the sonolysis is done in the presence of a support or porous host, then colloidal metal particles are formed. These powders have a surface area over a hundred times greater than powders commercially available and are amorphous. Such materials are generally considered for catalytic reactions and not for magnetic applications. 

These two processes are not necessarily coterminous. Whilst electronic, optical and magnetic applications require individual pure lanthanides, the greatest quantity of lanthanides is used as mixtures, e.g. in mischmetal or oxide catalysts. 

There are presently four families of high-temperature superconductors under investigation for practical magnet applications. Table 11-25 shows that all HTS are copper oxide ceramics even though the oxygen content may vary. However, this variation generally has little effect on the physical properties of importance to superconductivity. 

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