T. Ibusuki

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Publications (2)3.01 Total impact

  • Article: Microwave Oscillations of the Giant Magnetoresistive Element in a Magnetic Field Perpendicular to the Plane
    J. Masuko, M. Matsubara, J. Hashimoto, H. Kanai, Y. Uehara, T. Ibusuki, M. Sato, T. Wada, Y. Suzuki
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    ABSTRACT: Applied voltage and magnetic field dependence of microwave oscillations have been studied for the giant magnetoresistive (GMR) element. In this experiment, a magnetic field is applied perpendicular to the plane of GMR films. It is found that the power spectral density (PSD) is less dependent on the direction of magnetic field and the resistance gap induced by the magnetic field corresponds to the rapid increase of PSD. Moreover, noise peaks are observed in a high frequency range (about 8 GHz or higher) when a magnetic field of more than 2000 Oe is applied. The peak frequencies shift to higher frequency as the magnitude of magnetic field increases. In contrast to a magnetic field, the peak frequencies and their widths are more susceptible to the direction of current.
    IEEE Transactions on Magnetics 11/2009; · 1.36 Impact Factor
  • Article: Experimental simulation of infrared spectra of PSCs: films of nitric acid/water-ice mixture at low temperatures observed by grazing-angle reflection spectroscopy
    M. Sato, O. Setokuchi, K.M.T. Yamada, T. Ibusuki
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    ABSTRACT: The grazing-angle reflection spectra of nitric acid/water-ice particles deposited on a cold finger were recorded in the infrared region as a model of polar stratospheric clouds (PSCs). The observed spectra were compared with experimental transmission spectra and theoretically predicted extinction spectra of particles, which are available in literature. The grazing-angle reflection spectra of water-ice and nitric acid mono-hydrate (NAM) agree well with both the transmission and simulation spectra. On the other hand, those of nitric acid tri-hydrate (NAT) exhibit the character of the liquid phase spectra of aqueous nitric acid solution; considerably different from the transmission spectra of crystalline NAT. The differences can be explained in terms of the formation of liquid on the surface of the particles.
    Vibrational Spectroscopy 31(2):167-172. · 1.65 Impact Factor
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