There are several models for magnetic hysteresis. Their key purposes to model magnetization curves with a history dependence achieve hysteresis cycles without frequency dependence. different approaches handling The two main categories Duhem-type and Preisach-type models. Duhem handle it via simple directional on the flux rate, proper memory. While Preisach type handles memory of point where dir...

This thesis presents the design, modeling, implementation, and control of a magnetically suspended reaction sphere with one-axis hysteresis drive (1D-MSRS). The goal of this project is two fold: (a) exploring the design for a reaction sphere in 3D for spacecraft’s attitude control, and (b) studying the performance of the hysteresis motor in reaction wheel applications. The 1D-MSRS is a motor wi...

We have observed low-frequency noise due to quasiequilibrium thermal magnetization fluctuations in micron-scale magnetic tunnel junctions (MTJs). This strongly field-dependent magnetic noise occurs within the magnetic hysteresis loops, either as 1/f or Lorentzian (random telegraph) noise. We attribute it to the thermally excited hopping of magnetic domain walls between pinning sites. Our result...

The magnetic hysteresis of an individual magnetic disc switching in and out of the vortex state has been exhaustively measured using nanomechanical torsional resonator torque magnetometry. Each individual hysteresis loop pinpoints two sharp events, a single vortex creation and an annihilation, with a bias field precision of 0.02 kAm−1. Statistical analysis of thousands of hysteresis loops revea...

Slow relaxation of the magnetization and hysteresis loop were observed in the antiferromagnetic ordered phase of a two-dimensional framework based on one-dimensional Co(II) magnetic chains.

Magnetic hysteresis is probably one of the most fascinating and complex physical phenomena. While (dynamically) quasi-linear magnetic materials are the basis of many practical applications (linear inductors, power transformer etc.), there exist several examples wherein the exploitation of non-linear magnetic materials is central to obtaining good signal detection performance. An example of such...

An approach to increase the capabilities of integrated circuit nonvolatile memory is to take advantage of the hysteresis in the polarization of ferroelectric materials. For a rigorous analysis of the resulting devices, a suitable model for the ferroelectric effects has been developed. We present this model and show the results of its implementation into a device simulator. Although this model w...

High quality heating device made of ferromagnetic alloy (thermal seed) was developed for hyperthermia treatment of cancer. Ferromagnetic seeds of PdNi, PdCo and CuNi are prepared by induction furnace and subsequent heat treatment. Magnetic induction and hysteresis loops are measured as functions of temperature. The power dissipated from each seed was calculated from the area enclosed by the hys...

This paper proposes a macroscopic model for ferromagnetic hysteresis that is well-suited for finite element implementation. The model is readily vectorial and relies on a consistent thermodynamic formulation. In particular, the stored magnetic energy and the dissipated energy are known at all times, and not solely after the completion of closed hysteresis loops as is usually the case. The obtai...