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Your search keyword '"Julian Penkov Geshev"' showing total 2 results
Start Over Author "Julian Penkov Geshev" Journal ieee transactions on magnetics
2 results on '"Julian Penkov Geshev"'

1. Evaluation of the anisotropy field for fine-particle systems from low-field thermomagnetic curves

Author

M. Mikhov, Julian Penkov Geshev, Ll.M. Martinez, Joao Edgar Schmidt, and J.S. Munoz

Subjects
Materiais magnéticos, Materials science, Magnetic domain, Condensed matter physics, Field (physics), Single-domain particles, Fine-particle systems, Thermomagnetic curves, Thermomagnetic convection, Magnetismo, Anisotropia magnética, Magnetocrystalline anisotropy, Campos magnéticos, Pequenas particulas, Tratamento termomagnetico, Electronic, Optical and Magnetic Materials, Magnetic field, Magnetic anisotropy, Tratamento térmico, Electrical and Electronic Engineering, Anisotropy, Spontaneous magnetization
Abstract

A method for evaluating the temperature-dependent magnetic anisotropy field from thermomagnetic curves for Stoner-Wohlfarth-like systems is proposed. It allows the anisotropy parameters of a sample with unknown spontaneous magnetization to be obtained by using magnetic fields considerably lower than the anisotropy field.

Published
1999

2. Interaction effects detected by Fourier analysis of hysteresis loops and initial magnetization curves

Author

V. Masheva, M. Mikhov, and Julian Penkov Geshev

Subjects
Materials science, Condensed matter physics, Coercivity, Magnetic hysteresis, Electronic, Optical and Magnetic Materials, Condensed Matter::Materials Science, Hysteresis, Magnetization, symbols.namesake, Fourier transform, Remanence, Fourier analysis, Condensed Matter::Superconductivity, Stoner–Wohlfarth model, symbols, Electrical and Electronic Engineering
Abstract

A new technique for the estimation of interparticle interaction effects in some magnetic systems is developed only on the basis of Fourier description of experimental hysteresis loops and initial magnetization curves, avoiding remanence measurements. This technique is applied for Ba-ferrite powders and for several currently used magnetic recording media. It is found that the results coincide fairly well with these obtained by the commonly accepted /spl Delta/I technique, using remanence curves. >

Published
1994

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