Low Ghz loss in sputtered epitaxial Fe

C. Scheck; L. Cheng; W. E. Bailey

Low Ghz loss in sputtered epitaxial Fe

Materials Science 2007-05-23 v1

Authors: C. Scheck , L. Cheng , W. E. Bailey

Abstract

We show that sputtered, pure epitaxial iron films can have high-frequency loss as low as, or lower than, any known metallic ferromagnetic heterostructure. Minimum 34 Ghz ferromagnetic resonance (FMR) linewidths of 41 Oe are demonstrated, some ~ 5-10 % lower than the previous minimum reported for molecular beam epitaxially (MBE) deposited Fe. Intrinsic and extrinsic damping have been separated over 0-40 Ghz, giving a lower bound for intrinsic LL(G) relaxation rates of lambda or G = 85 MHz (alpha = 0.0027) and extrinsic 50 Mhz. Swept frequency measurements indicate the potential for integrated frequency domain devices with Q>100 at 30-40 Ghz.

Keywords

iron films ferromagnetic resonance microwave loss intrinsic damping extrinsic damping

Cite

@article{arxiv.cond-mat/0602094,
  title  = {Low Ghz loss in sputtered epitaxial Fe},
  author = {C. Scheck and L. Cheng and W. E. Bailey},
  journal= {arXiv preprint arXiv:cond-mat/0602094},
  year   = {2007}
}

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