Magnetic Flux Density Measurements Relative to Magnetic Particle Testing

2009 ◽  
pp. 211-211-9
Author(s):  
KW Schroeder
Keyword(s):  
Magnetic Flux ◽  
Flux Density ◽  
Magnetic Particle ◽  
Magnetic Flux Density ◽  
Density Measurements ◽  
Magnetic Particle Testing

scholarly journals Magnetic flux density measurements from grain boundary phase in 0.1 at% Ga-doped Nd–Fe–B sintered magnet

2020 ◽  
Vol 178 ◽  
pp. 533-538 ◽  
Author(s):  
Youngji Cho ◽  
Taisuke Sasaki ◽  
Ken Harada ◽  
Atsuko Sato ◽  
Takehiro Tamaoka ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Magnetic Flux ◽  
Flux Density ◽  
Boundary Phase ◽  
Magnetic Flux Density ◽  
Sintered Magnet ◽  
Density Measurements

scholarly journals Magnetic flux density measurements from narrow grain boundaries produced in sintered permanent magnets

Microscopy ◽  
2020 ◽  
Author(s):  
Youngji Cho ◽  
Sujin Lee ◽  
Yasukazu Murakami
Keyword(s):  
Magnetic Flux ◽  
Flux Density ◽  
Permanent Magnets ◽  
Thin Foil ◽  
Magnetic Flux Density ◽  
Electron Holography ◽  
Sintered Magnet ◽  
Density Measurements ◽  
Interface Magnetism

Abstract This review examines methods of magnetic flux density measurements from the narrow grain boundary (GB) regions, the thickness of which is of the order of nanometers, produced in Nd–Fe–B-based sintered magnets. Despite of the complex crystallographic microstructure and the significant stray magnetic field of the sintered magnet, recent progress in electron holography allowed for the determination of the intrinsic magnetic flux density due to the GB which is embedded in the polycrystalline thin-foil. The methods appear to be useful as well for intensive studies about interface magnetism in a variety of systems.

Characterization and modeling of hard magnetic particle–based magnetorheological elastomers

2020 ◽  
pp. 1045389X2094256
Author(s):  
Nader Mohseni Ardehali ◽  
Masoud Hemmatian ◽  
Ramin Sedaghati
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Flux Density ◽  
Magnetic Particle ◽  
Excitation Frequency ◽  
Viscoelastic Behavior ◽  
Magnetic Flux Density ◽  
Driving Frequency ◽  
Magnetorheological Elastomers ◽  
Magnetic Poles

Hard magnetic particle–based magnetorheological elastomers are novel magnetoactive materials in which, unlike the soft particle–based magnetorheological elastomers, the particles provide magnetic poles inside the elastomeric medium. Therefore, the stiffness of the hard magnetic particle–based magnetorheological elastomers can be increased or decreased by applying the magnetic field in the same or opposite direction as the magnetic poles, respectively. In the present work, the viscoelastic properties of hard magnetic particle–based magnetorheological elastomers operating in shear mode have been experimentally characterized. For this purpose, hard magnetic particle–based magnetorheological elastomers with 15% volume fraction of NdFeB magnetic particles have been fabricated and then tested under oscillatory shear motion advanced rotational magneto-rheometer to investigate their viscoelastic behavior under varying excitation frequency and magnetic flux density. The influence of the shear strain amplitude and driving frequency is examined under various levels of applied magnetic field ranging from −0.2 to 1.0 T. Finally, a field-dependent phenomenological model has been proposed to predict the variation of storage and loss moduli of hard magnetic particle–based magnetorheological elastomers under varying excitation frequency and applied magnetic flux density. The results show that the proposed model can accurately predict the viscoelastic behavior of hard magnetic particle–based magnetorheological elastomers under various working conditions.

scholarly journals Estimation of localized current anomalies in polymer electrolyte fuel cells from magnetic flux density measurements

AIP Advances ◽  
2016 ◽  
Vol 6 (5) ◽  
pp. 056603 ◽  
Author(s):  
Takaaki Nara ◽  
Masanori Koike ◽  
Shigeru Ando ◽  
Yuji Gotoh ◽  
Masaaki Izumi
Keyword(s):  
Fuel Cells ◽  
Magnetic Flux ◽  
Polymer Electrolyte ◽  
Flux Density ◽  
Polymer Electrolyte Fuel Cells ◽  
Magnetic Flux Density ◽  
Density Measurements
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