| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a magnetic core material for an antenna which secures sufficient antenna performance, can be thinned, and has resistance to deformation. <P>SOLUTION: The magnetic core material for an antenna is composed of an amorphous alloy strip with a sheet thickness of ≤25 μm or a nanocrystal alloy strip with a sheet thickness of ≤25 μm in which at least 50% of the structure is composed of crystal grains with a grain size of ≤100 nm, and further, induced magnetic anisotropy is applied to the width direction or thickness direction of the alloy strip. As the amorphous alloy strip, the one expressed by the general formula of (Co<SB>1-a</SB>Fe<SB>a</SB>)<SB>100-b-c-d-e</SB>T<SB>b</SB>Si<SB>c</SB>B<SB>d</SB>Y<SB>e</SB>is preferable, and, as the nanocrystal alloy strip, the one expressed by the general formula of (Fe<SB>1-v</SB>M<SB>v</SB>)<SB>100-x-y-z-w</SB>A<SB>x</SB>M'<SB>y</SB>M''<SB>z</SB>X<SB>w</SB>is preferable. <P>COPYRIGHT: (C)2007,JPO&INPIT |
