Title :
Estimation of effective magnetic field in an iron bar by the ultrasonic resonance method
Author :
Hatafuku, H. ; Watanabe, K. ; Yoshida, T.
Author_Institution :
Iwate Univ., Morioka, Japan
Abstract :
In this paper the strength of the effective field, Heff, is estimated along a rod specimen by transmitting ultrasonic waves to the specimen. The iron bar used in the study has a size 5×5 mm2 in cross section and 100 mm in length. The effective field, Heff, is calculated from the magnetization curve and demagnetization factor of the specimen. The dependence of the electromotive force (emf) due to ultrasonic waves on Heff at the center node of bar in the stationary state is presented. The magnetostriction measured at the center of the iron bar is also presented.
Keywords :
demagnetisation; electric potential; iron; magnetisation; magnetostriction; ultrasonic materials testing; 100 mm; 5 mm; Fe; demagnetization factor; effective field strength; effective magnetic field; electromotive force; iron bar; magnetization curve; magnetostriction; ultrasonic resonance method; Coils; Demagnetization; Iron; Magnetostriction; Resonance; Saturation magnetization; State estimation; Stationary state;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1464489