Adjust the resonance frequency of (Co90Nb10/Ta)n multilayers from 1.4 to 6.5 GHz by controlling the thickness of Ta interlayers

Guozhi Chai; Yuancai Yang; Jingyi Zhu; Min Lin; Wenbo Sui; Dangwei Guo; Xiling Li; Desheng Xue
January 2010
Applied Physics Letters;1/4/2010, Vol. 96 Issue 1, p012505
Academic Journal
In this work, the static and high frequency magnetic properties of (Co90Nb10/Ta)n multilayers have been investigated. The results show that the in-plane uniaxial magnetic anisotropy fields can be adjusted from 12 to 520 Oe only by decreasing the thickness of Ta interlayers from 8.0 to 1.8 nm. As a consequence, the resonance frequencies of the multilayers continuously increased from 1.4 to 6.5 GHz. It was found that the changes in the in-plane uniaxial anisotropy field are ascribed to the interlayer interactions among the magnetic layers by investigating the δM(H) curves.


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