scholarly journals Low-NoiseYBa2Cu3O7Nano-SQUIDs for Performing Magnetization-Reversal Measurements on Magnetic Nanoparticles

2015 ◽  
Vol 3 (4) ◽  
Author(s):  
T. Schwarz ◽  
R. Wölbing ◽  
C. F. Reiche ◽  
B. Müller ◽  
M. J. Martínez-Pérez ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetization Reversal

scholarly journals Controlling Magnetization Reversal and Hyperthermia Efficiency in Core–Shell Iron–Iron Oxide Magnetic Nanoparticles by Tuning the Interphase Coupling

2020 ◽  
Vol 3 (5) ◽  
pp. 4465-4476 ◽  
Author(s):  
K. Simeonidis ◽  
C. Martinez-Boubeta ◽  
D. Serantes ◽  
S. Ruta ◽  
O. Chubykalo-Fesenko ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Magnetization Reversal ◽  
Core Shell ◽  
Iron Oxide Magnetic Nanoparticles ◽  
Iron Iron

scholarly journals Ultralow field magnetization reversal of two-body magnetic nanoparticles

AIP Advances ◽  
2016 ◽  
Vol 6 (8) ◽  
pp. 085006
Author(s):  
Fei Li ◽  
Jincheng Lu ◽  
Xiaofeng Lu ◽  
Rujun Tang ◽  
Z. Z. Sun
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetization Reversal ◽  
Field Magnetization

scholarly journals Magnetization reversal time of magnetic nanoparticles at very low damping

2014 ◽  
Vol 89 (5) ◽  
Author(s):  
William T. Coffey ◽  
Yuri P. Kalmykov ◽  
Serguey V. Titov
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetization Reversal ◽  
Reversal Time

scholarly journals Magnetization Reversal and Specific Loss Power of Magnetic Nanoparticles in Cellular Environment Evaluated by AC Hysteresis Measurement

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Satoshi Ota ◽  
Tsutomu Yamada ◽  
Yasushi Takemura
Keyword(s):  
Magnetic Nanoparticles ◽  
Theoretical Model ◽  
Single Cell ◽  
Magnetization Reversal ◽  
Heat Dissipation ◽  
Magnetic Moments ◽  
Hysteresis Loops ◽  
Dipole Interactions ◽  
Fixed Sample ◽  
Cellular Environment

The effect of intracellular hyperthermia induced by magnetic nanoparticles (MNPs) has been evaluated using a theoretical model. In this study, magnetization reversal of MNPs in the cellular environment under an AC magnetic field was evaluated on the basis of measured AC hysteresis loops. The specific and intrinsic loss powers—SLP and ILP—were also estimated from the area of AC hysteresis loops. The measured samples were a liquid sample dispersed in water, a fixed sample mixed with an epoxy bond, and a cellular sample. In the cellular environment, the rotations of particles and magnetic moments were inhibited by particle-cell and dipole-dipole interactions, respectively. The heat dissipation of the MNPs in the cellular environment was lower than that of the liquid and fixed samples. Moreover, the SLP in a single cell was estimated. The temperature increase of a single cell was calculated on the basis of the conventional theoretical model and the SLP measured in a single cell.

Determination of eddy current losses and hysteresis losses in magnetic circuits of electrical machines

2020 ◽  
pp. 54-58
Author(s):  
S. M. Plotnikov
Keyword(s):  
Eddy Current ◽  
Magnetization Reversal ◽  
Eddy Currents ◽  
Technical Problem ◽  
Electrical Machines ◽  
Eddy Current Losses ◽  
Hysteresis Losses ◽  
Magnetic Circuits ◽  
Core Losses ◽  
Reversal Frequency

The division of the total core losses in the electrical steel of the magnetic circuit into two components – losses dueto hysteresis and eddy currents – is a serious technical problem, the solution of which will effectively design and construct electrical machines with magnetic circuits having low magnetic losses. In this regard, an important parameter is the exponent α, with which the frequency of magnetization reversal is included in the total losses in steel. Theoretically, this indicator can take values from 1 to 2. Most authors take α equal to 1.3, which corresponds to the special case when the eddy current losses are three times higher than the hysteresis losses. In fact, for modern electrical steels, the opposite is true. To refine the index α, an attempt was made to separate the total core losses on the basis that the hysteresis component is proportional to the first degree of the magnetization reversal frequency, and the eddy current component is proportional to the second degree. In the article, the calculation formulas of these components are obtained, containing the values of the total losses measured in idling experiments at two different frequencies, and the ratio of these frequencies. It is shown that the rational frequency ratio is within 1.2. Presented the graphs and expressions to determine the exponent α depending on the measured no-load losses and the frequency of magnetization reversal.

Magnetic Aftereffect and Magnetization Reversal of Sr-Ferrite Fine Particles.

1994 ◽  
Vol 18 (2) ◽  
pp. 193-196 ◽  
Author(s):  
H. Nishio ◽  
H. Taguchi ◽  
F. Hirata ◽  
T. Takeishi
Keyword(s):  
Magnetization Reversal ◽  
Fine Particles ◽  
Magnetic Aftereffect
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