| http://www.w3.org/ns/prov#value | - JP 2003-263719A (Ref. 3) teaches a magnetic powder compatible with MR heads that is composed of acicular particles comprised primarily of Fe including Co, Al, R (rare earth elements; including Y) and oxygen within prescribed ranges, wherein Co/Fe=10-50 at. %, solid state Al/(Fe+Co)=5-50 at. %, R/(Fe+Co)=2-25 at. %, oxygen???25 wt. %, average major axis length of the acicular particles=25-80 nm, an
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