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Presents a study which investigated the magnetic properties of an Fe[sub73.5]Cu[sub1]Nb[sub3]Si[sub13.5]B[sub9] alloy with nanoscale crystalline structure as a function of the melt temperature. Background on the alloy; Experimental details; Results and discussion.

The effects of Zn-phosphate coating on the magnetic properties of Fe73.5Cu1Nb3Si15.5B7 nanocrystalline alloy powder cores have been investigated. The Zn-phosphate coating provided good electrical insulation between the magnetic particles through formation of an oxide and other compounds on their surfaces. The consolidated magnetic cores with powders treated in the solution of pH=1.3 acidity exhibited a permeability of 45, persisting up to about 2 MHz and a core loss of 500 mW/cm3 at the frequency of 50 kHz under the induction of Bm=0.1 T. Furthermore, 62% permeability at 50 Oe of dc bias field was obtained. From these results, it was considered that the Zn-phosphate coating could be an effective method to form an efficient insulating coat even for small-sized Fe73.5Cu1Nb3Si15.5B7 nanocrystalline alloy powders. [ABSTRACT FROM AUTHOR]

Cold-pressed nanocrystalline powder cores were fabricated using powders of nanocrystalline ribbons which were ball milled for short time. Their magnetic properties at high frequency were measured. The powder size ranges from 20 to 850 mm and the contents of the glass binder are between 1 and 8 wt%. For cores composed of large particles of 300-850 μm with 5 wt% glass binder, we obtained a stable permeability of 100 up to 800 kHz, a maximum level 31 of quality factor at frequency of 50 kHz, and 320 mW/cm[SUP3] core loss at f=50 kHz and B[SUBm]=0.1 T. This is mainly due to the good soft magnetic properties of the powders and the higher insulation of powder cores which cause low eddy current losses. [ABSTRACT FROM AUTHOR]

Focuses on a study which investigated the magnetostriction of melt-spun ribbons of Dy[subx](Fe[sub1-y]B[suby])[sub1-x] alloys as a function of the wheel speed during melt quenching. Experimental details; Results and discussion; Conclusion.

Provides information on a study which investigated the magnetic relaxation phenomenon by using the pulse method for an alloy with nanoscale grain structure. Relationship between the microstructure and the magnitude of magnetic aftereffect in the nanocrystalline state; Change in the jumping field defined by the magnetic field; Features of Fe based nanocrystalline materials.

Presents a study that focused on the effects of ball milling on the magnetic properties of praseodymium-iron-boron alloy. Use of thermomagnetic curves and x-ray diffraction patterns; Discussion of rare-earth elements; X-ray diffraction patterns of annealed alloys.

Discusses a study that investigated the metalloid effect on magnetic properties and microstructures of iron-based alloy with ultrafine grain structures. Magnetic softness of iron based Fe-Cu-Nb-Si-B alloys with ultrafine grains prepared by crystallization from amorphous states; Phases and microstructures of the annealed samples used; Temperature dependence of the residual magnetization.

Studies the effect of copper and niobium addition on the crystallization processes and soft magnetic properties for iron-silicon-boron alloys. Experimental procedures; Information on the permeability values of alloys; Thermograms of the amorphous alloys.

Provides information on a study which investigated the effect of cooling rate, followed immediately after the isothermal annealing, on the magnetic properties of a melt-spun iron compound alloy. Methods; Results; Discussion.

Presents a study which examined the amorphous state of ferromagnetic iron[sub83]boron[sub9]niobium[sub7]copper[sub1] and its nanocrystallization. Experimental details; Results and discussion; Conclusions.

Presents a study which investigated the relationship between alternating current and direct current magnetic properties of a Co-based amorphous alloys. Methodology; Results of the study; Conclusions.

Presents a study which investigated the effects of cooling rate after annealing on the soft magnetic properties for an Fe[sub88]Zr[sub7]B[sub4]Cu[sub1] alloy with nanoscale grain structure, that was prepared by melt quenching. Effective permeability of the alloy; Remanence ratio as a function of annealing temperature; Change in the intensity of disacommodation as a function of time for the alloy annealed for one hour.

Presents a study which investigated the effects of aluminum on the soft magnetic properties of nanocrystalline iron[sub73.5-x]aluminum[subx]copper[sub1]niobium[sub3]silicon[sub13.5]boron[sub9] alloy ribbons. Experimental details; Results and discussion; Conclusions.