| 摘要 |
An Fe-based amorphous alloy having a compositional formula in atomic percent represented by Fe100-a-b-c-d-e-fAlaGabPcCdBeSif, wherein a to f satisfy 4</=a</=6, 1</=b</=3, 9</=c</=12, 5</=d</=7, 3</=e</=5 and 0.25</=f</=4. The Fe-based amorphous alloy is an amorphous magnetic material having an excellent amorphous phase-forming ability, and can easily form an amorphous material having a thickness of 1.5 mm or above by a mold casting method realizing a cooling speed of about 103 K/s. Also, because the amorphous alloy has a supercooled liquid region of 50 K or larger, by applying a working method utilizing a super cooled state, amorphous magnetic materials of various form can be prepared.
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