Ultrahigh Sensitivity Ferromagnetic Resonance Measurement Based on Microwave Interferometer

  title={Ultrahigh Sensitivity Ferromagnetic Resonance Measurement Based on Microwave Interferometer},
  author={S Tamaru and Kay Yakushiji and Akio Fukushima and Shinji Yuasa and Hitoshi Kubota},
  journal={IEEE Magnetics Letters},
An ultrahigh sensitivity ferromagnetic resonance (FMR) measurement technique based on a microwave interferometer was developed. A comparison between conventional and interferometer-based FMR showed a signal-to-noise ratio (SNR) improvement of as much as 42 dB. This largely improved SNR allowed clear resolution of the FMR signal of the uniform mode on a 100 nm diameter, 5 nm thick CoFeB single nanodot, and even higher order modes on a 400 nm diameter CoFeB single nanodot. A system noise… CONTINUE READING


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