Dynamic domain wall movement of surface scratched silicon steels

Author

Arai, K.I. ; Mogi, H. ; Ishiyama, K.

Author_Institution

Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

1966

Lastpage

1968

Abstract

The relationship between the magnetic domain configuration and the groove dimension on grain-oriented 3% Si-Fe sheets was examined in the vicinity of the grooves using a scanning electron microscope. The grooves were formed on the sheet surface by a chemical scratching technique in order to refine the magnetic domains to reduce the eddy current loss. The eddy current loss considerably increased when the groove depth exceeded 20 μm in sheets of 62-76-μm thickness. The optimum groove dimension for decreasing the loss was determined by observing the dynamic domain wall movement at 50 Hz. After the optimum domain refining, the iron loss of the 32-μm thick sheet became W13/50=0.13 W/kg and W17/50=0.21W/kg. The former is lower than the value determined for an Fe-based amorphous sheet

Keywords

eddy current losses; ferromagnetic properties of substances; iron alloys; magnetic domain walls; magnetic hysteresis; magnetisation reversal; silicon alloys; 32 micron; 50 Hz; 62 to 76 micron; Si steel; Si-Fe sheets; amorphous sheet; chemical scratching technique; dynamic domain wall movement; eddy current loss; grain oriented sheets; groove depth; hysteresis loss; magnetisation reversal; scanning electron microscope; Amorphous materials; Chemicals; Eddy currents; Iron; Magnetic domain walls; Magnetic domains; Magnetic force microscopy; Scanning electron microscopy; Silicon; Steel;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104584

Filename

104584