magnetic hysteresis


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magnetic hysteresis

[mag′ned·ik ‚his·tə′rē·səs]
(electromagnetism)
Lagging of changes in the magnetization of a substance behind changes in the magnetic field as the magnetic field is varied. Also known as hysteresis.
References in periodicals archive ?
Caption: FIGURE 6: Dependence of magnetic hysteresis loop (a) and Ms and Hc (b) for the as-quenched [([Fe.sub.0.39] [Co.sub.0.15] [Ni.sub.0.46]).sub.80] [B.sub.14][Si.sub.6] ribbon on the annealing temperature ranging from 678 K to 738 K.
An interesting, negative magnetic hysteresis loop indicating antiferromagnetic behavior was measured in the Al-Co-doped zinc oxide film and interpreted via a twolayer model where the film consists of layers with two different magnetic moments and substantiated by the unique behavior in the S parameter of the Co-Al:ZnO film arising from layers with different defect structures.
Caption: FIGURE 5: Magnetic hysteresis curve of (a) water-based LTE MNPs ferrofluid and (b) magnetic nanoparticles.
The measured magnetic hysteresis loops for the two different-sized [Co.sub.2]Z hexaferrites are presented in Fig.
The magnetic hysteresis loops of the samples are illustrated in Fig.
where [P.sub.Fe] is total iron core loss of unit mass, [P.sub.h] is magnetic hysteresis loss of unit mass, [P.sub.e] is eddy current loss of unit mass, and [P.sub.ex] is additional loss of unit mass.
Furthermore, the complex showed a magnetic hysteresis loop below 0.5 K.
Khosroshahi, an associate professor at Amirkabir University of Technology managed to prepare mono, bi, and tri-layer nanoparticles of Fe3O4, Fe3O4/SiO2 and Fe3O4/SiO2/Au with respective dimensions of 30, 50, and 70 nm as the initial phase.Then, he measured most of important magnetic properties such as saturation magnetization, magnetic hysteresis, magnetic residue (magnetic remanence), coercivity, bulk saturation, magnetic moment and specific area of the particles by BET and VSM devices."In the initial step to fight against the lung cancer cells (apaptosis), a culture medium containing these cells (QU-DB) was prepared in collaboration with Pasteur Institute of Iran.
Figure 4 shows the magnetic hysteresis loops obtained for some composites.
In a material such as G[d.sup.[0.94]]E[r.sup.[0.06]] that exhibits a second-order phase transition above the magnetic ordering temperature, magnetic hysteresis does not exist.
Magnetic hysteresis effects can also affect the geometric factor.
Another challenge for HTS magnets is ac losses, both in the form of magnetic hysteresis and heat-generating eddy currents that add to the refrigeration load.