Magnetic recording medium.

摘要

A magnetic recording medium is described which comprises, on a support, a magnetic layer containing ferromagnetic powder, said ferromagnetic powder comprising ferromagnetic metallic particles or cobalt-adsorbed-iron oxide particles, the average grain size of said particles being not more than 0.5µ, the ratio of the major axis to the minor axis (acicular ratio) Ra and the coercive force Hc thereof satisfying the following formulae:<MathDetails id="matha01"><MathText><![CDATA[ <img id="ia01" file="imga0001.tif" wi="23" he="8" img-content="math" img-format="tif" inline="no" /> ]]></MathText></MathDetails>and<MathDetails id="matha02"><MathText><![CDATA[ <img id="ia02" file="imga0002.tif" wi="35" he="5" img-content="math" img-format="tif" inline="no" /> ]]></MathText></MathDetails>