Martino LoBue

Connection between hysteresis and thermal relaxation in magnetic materials

The connection between hysteresis and thermal relaxation in magnetic materials is studied from both the experimental and the theoretical viewpoint. Hysteresis and viscosity effects are measured in Finemet-type nanocrystalline materials above the Curie temperature of the amorphous phase, where the system consists of ferromagnetic nanograins imbedded in a paramagnetic matrix. The hysteresis loop dependence on field rate, the magnetization time decay at different constant fields, and the magnetization curve shape after field reversal are all consistent with a single value of the fluctuation field

Three-Dimensional Analytical Modeling of a Permanent-Magnet Linear Actuator With Circular Magnets

{H}_{f}\ensuremath{\simeq}8{\mathrm{A}\mathrm{}\mathrm{m}}^{\ensuremath{-}1}

Magnetic Aftereffect in Spring Magnets And The Preisach Model Of Hysteresis

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Thermodynamic aspects of magnetic-field-driven phase transformations in Gd-Si-Ge alloys

430\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}).

Magnetoelectric effect in layered ferrite/PZT composites. Study of the demagnetizing effect on the magnetoelectric behavior

In addition, it is shown that all data collapse onto a single curve

Modeling Hysteresis of First-Order Magneto-Structural Phase Transformations

{M(H}_{\mathrm{ath}}),

Thermodynamics, Hysteresis, and Micromagnetics

when magnetization is plotted as a function of a properly defined field

Dynamic effects driven by thermal activation in the magnetization of nanocrystalline soft magnetic materials

{H}_{\mathrm{ath}},

Analysis of volume distribution of power loss in ferrite cores

dependent on time and field rate. Experimental data are interpreted by assuming that the system consists of an assembly of elementary bistable units, distributed in energy levels and energy barriers. The approximations under which one predicts data collapse onto a single curve

Giant coercivity of dense nanostructured spark plasma sintered barium hexaferrite

{M(H}_{\mathrm{ath}})