FERROMAGNETIC METAL POWDER, AND MAGNETIC RECORDING MEDIUM USING THE SAME

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PROBLEM TO BE SOLVED : To provide metal magnetic powder which can obtain high density magnetic recording medium having satisfactory storage stability and magnetic properties, and to provide a magnetic recording medium using the same. SOLUTION : There is provided ferromagnetic metal powder composed of acicular particles with the major axis length of ≤0.12 μm in which the content of the group 1a elements in the periodic table is reduced to ≤0.05 wt.%, and further, the remaining amount of the group 2a elements in the periodic table made into soluble is reduced to ≤0.1 wt.%, and which comprises aluminum of 0.1-30 atomic% to the total of the metallic elements or rare earth elements (including Y) of 0.1-10 atomic% to the total of the metallic elements. There is also provided a magnetic recording medium using the same. COPYRIGHT : (C)2011, JPO&INPIT