86,966 research outputs found
Crystal field theory and magnetic properties of transition metal ions in amorphous compounds
No full text
Local Symmetries and Structural Distortions In Amorphous Ferromagnetic Metals - A Study of Their Contributions To the Aftereffect of the Magnetic-permeability
No full text
Planar Magnetic-anisotropy of Fe40ni40b20 Ribbons Obtained With Different Quenching Rates
No full textKinetic and Structural Aspects of Magnetic Phenomena In Amorphous Soft Ferromagnets
No full textRecent results concerning domain structure and domain-wall motion in amorphous soft ferromagnets are reviewed. The effect of the value of the saturation magnetostriction is discussed, with particular emphasis on the change in sign of λs induced in nearly-zero magnetostriction alloys by large tensile stresses. The 'fast' permeability relaxation observed during high-frequency domain-wall motion is explained in terms of a domain-wall instability under extreme velocity conditions. Finally, the unique kinetic features of the slow relaxation (after-effect) of the initial magnetic permeability will be outlined. A specific experiment, conceived to check the assumptions of the model established for this relaxation process, is proposed and discussed in detail
New Approach To the Study of the Magnetic-permeability Aftereffect of Amorphous Ferromagnetic-alloys
No full text
Temperature-dependence of the Frequency-spectrum of the Magnetic-permeability Aftereffect In Co-rich Amorphous Metals
No full textNanocrystalline Phase-formation In Amorphous Fe73.5cu1nb3si13.5b9 Submitted To Conventional Annealing and Joule Heating
No full textThe influence of thermal treatment on the nanosized crystalline products developed from amorphous Fe735Cu1Nb3Si13.5B9 was studied by comparing the effects of different techniques such as isothermal annealing in a furnace and d.c. Joule heating. The microstructure of the produced samples was characterized using X-ray diffraction. A fitting procedure of the diffraction peaks of the resulting phase mixture was used to determine the contributions of the different phases (amorphous and nanocrystalline). A maximum crystalline fraction f(n) of about 60% was found in both conventionally and Joule annealed samples. The lattice parameter of the nanocrystalline phase was found to depend on f(n) independently of the annealing conditions. In conventionally annealed samples, the grain size increases with increasing f(n), ranging between 9 and 15 nm. However, a nearly constant value of about 11 nm was found in Joule heated samples. The initial magnetic permeability of samples submitted to Joule heating was found to be significantly higher than that of conventionally annealed samples. The effect of the type of heat treatment on nucleation and growth of the nanocrystalline phase is discussed
- …
