Sm(Co,Cu)5/Fe exchange spring multilayer films with high energy product

Zhang, J.; Takahashi, Y. K.; Gopalan, R.; Hono, K.
March 2005
Applied Physics Letters;3/21/2005, Vol. 86 Issue 12, p122509
Academic Journal
The [Sm(Co,Cu)5/Fe]6 multilayer film that was fabricated by annealing Cr[a-(Sm-Co)(9 nm)/Cu(x nm)/Fe(5 nm)/Cu(x nm)]6/Cr(x=0–0.75) multilayer has shown good in-plane texture and a high maximum energy product (BH)max of 32 MGOe with a coercivity of 7.24 kOe. The addition of the Cu layer between the a-d-SM-Co6 and Fe layers with optimum thickness increases the coercivity significantly, thereby improving the maximum energy product. The single-phase behavior and the irreversible rotation in the demagnetization process indicates strong exchange coupling between the Sm(Co,Cu)5 and Fe layers.


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