A pulsed field magnetometer for the characterization of hard magnetic materials

1988 ◽  
Vol 24 (2) ◽  
pp. 970-973 ◽  
Author(s):  
R. Grossinger ◽  
Ch. Gigler ◽  
A. Keresztes ◽  
H. Fillunger
1997 ◽  
Vol 70 (22) ◽  
pp. 3044-3046 ◽  
Author(s):  
Weihua Mao ◽  
Benpei Cheng ◽  
Jinbo Yang ◽  
Xiedi Pei ◽  
Yingchang Yang

2012 ◽  
Vol 23 (9) ◽  
pp. 1049-1054 ◽  
Author(s):  
Jeong-Hoi Koo ◽  
Alexander Dawson ◽  
Hyung-Jo Jung

This study investigates a new generation of magnetorheological elastomers based on hard magnetic particles. Unlike traditional magnetorheological elastomers that use iron particles, a dispersion of hard magnetic materials aligned in an electromagnetic field will produce a magnetorheological elastomer with magnetic poles. When a magnetic field is applied, perpendicularly to these poles, the filler particles generate torque and cause rotational motion of the magnetorheological elastomer blend. The primary goal of this study is to fabricate and characterize the actuation properties of magnetorheological elastomers filled with various hard magnetic particles. To this end, samples of magnetorheological elastomers consisting of hard magnetic materials were fabricated using four different particle types, and a test setup (electromagnet) was constructed. After mounting the magnetically anisotropic samples in a fixed-free configuration, uniform magnetic fields are applied to the samples (perpendicular to the poled direction), which causes the sample to bend, similar to a cantilevered beam. The blocked force and tip displacement of the samples were measured to characterize actuation properties of the samples. The results show that the responses of the deflection and the blocked force at the tip show linear trends over a reasonable range, suggesting that magnetorheological elastomers consisting of hard magnetic materials can be used as bending-type actuators in small mechanical systems and devices.


2021 ◽  
Vol 7 (6) ◽  
pp. 89
Author(s):  
Valerio De Santis

Recent advances in computational electromagnetics (CEMs) have made the full characterization of complex magnetic materials possible, such as superconducting materials, composite or nanomaterials, rare-earth free permanent magnets, etc [...]


2021 ◽  
Vol 32 (4) ◽  
pp. 958-969 ◽  
Author(s):  
Mark T. Stewart ◽  
David E. Haines ◽  
Damijan Miklavčič ◽  
Bor Kos ◽  
Nicole Kirchhof ◽  
...  

1993 ◽  
Vol 29 (6) ◽  
pp. 2878-2880 ◽  
Author(s):  
T. Schrefl ◽  
H.F. Schmidts ◽  
J. Fidler ◽  
H. Kronmuller

2002 ◽  
Vol 64 (3) ◽  
pp. 237-243 ◽  
Author(s):  
Yoshihisa WAKITA ◽  
Akira SHIMIZU ◽  
Václav HÁJEK ◽  
Junichi KAWANO ◽  
Kenji YAMASHITA

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