High permeability and low loss Ni-Fe composite material for high-frequency applications

被引：87

作者：

Shirakata, Yasushi ^{[1
,2
]}

Hidaka, Nobuhiro ^{[1
,3
]}

Ishitsuka, Masayuki ^{[3
]}

Teramoto, Akinobu ^{[1
]}

Ohmi, Tadahiro ^{[1
]}

机构：

[1] Tohoku Univ, New Ind Creat Hatchery Ctr, Sendai, Miyagi 9808679, Japan

[2] Yokowo Co Ltd, Div Res & Dev, Tokyo 1148515, Japan

[3] Sumitomo Osaka Cement Co Ltd, Adv Mat Res Lab, Chiba 2748601, Japan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2008年 / 44卷 / 09期

关键词：

antennas; high frequency; magnetic loss; permalloy; permeability;

D O I：

10.1109/TMAG.2008.2001073

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A magnetic material with high permeability and low loss characteristics at high frequency is required for miniaturizing electronic components such as antennas. The key factors to keeping low magnetic loss are a high magnetic resonance frequency and the suppression of the eddy currents. We have fabricated a low-loss magnetic composite material by dispersing Ni78Fe22 (permalloy) fine flakes in polymers; the thickness of the flakes was less than skin depth. The magnetic loss decreased with increased stirring time, and the minimum value occurred when the agglomerated particles decreased and most of the particles were deformed into flakes. Moreover, Zn5Ni75Fe20 composite material indicated high permeability when the flakes were oriented in the direction of sheets. The effect of wavelength shortening by permeability enhancement and the low loss characteristic were confirmed by experimental results of a rod antenna loaded with the developed magnetic composite material.

引用

页码：2100 / 2106

页数：7

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