Magnetic properties of Fe-based toroidal cores prepared by continuous Joule heating under tensile stress

被引：0
|
作者：
Yanai, T. [1 ]
Shimada, A. [1 ]
Takagi, K. [1 ]
Takahashi, K. [1 ]
Nakano, M. [1 ]
Fukunaga, H. [1 ]
Yoshizawa, Y. [2 ]
机构：
[1] Faculty of Engineering, Nagasaki University, Nagasaki 852-8521, Japan
[2] Advanced Electronics Research Laboratory, Hitachi Metals Ltd., Kumagaya 360-0843, Japan
来源：
Journal of Applied Physics | 2007年 / 101卷 / 09期
关键词：
Fe-based toroidal cores with a permeability value of several hundreds were prepared by the continuous Joule heating method under tensile stress at a high moving velocity of 120 cmmin; corresponding to an effective annealing time of approximately 1.8 s; and their magnetic properties were evaluated. The prepared core showed a constant permeability value up to 2 MHz and a low magnetic loss compared with those for conventional cores with controlled permeability. An investigation of dc-bias properties of the core suggested that the core has constant and good magnetic properties below the dc-bias field of 1 kAm which is approximately 50% of the anisotropy field. Consequently; the continuous Joule heating under a tensile stress method at high moving velocity enables us to prepare a long annealed ribbon in a short time with simple equipment and improves productivity for the fabrication process of high performance Fe-based toroidal cores with controlled permeability. © 2007 American Institute of Physics;
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