Abstract
An experimental result and a micromagnetics model of a double layered CoCrTa film separated by a thin flash Cr interlayer are described. In the experiment, coercivity and coercivity squareness drastically changed with an increase in the Cr interlayer thickness. There was some coercivity increase in the double layered films compared to a single layered film when the flash Cr interlayer thickness was around 8 /spl Aring/ to 10 /spl Aring/ and coercivity decreased with further increase of the Cr interlayer thickness up to 50 /spl Aring/. At a very thin interlayer range, the change of coercivity is affected mainly by the change of exchange interaction. By using the assumption of the formation of a Cr island type interlayer at a thin interlayer region, we can explain the increment of coercivity at the initial state.
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