• Title/Summary/Keyword: SPIN

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Electronic Spin Filter via Spin Superlattice

  • Han, Jae-Ho;Lee, H.W.;You, Chun-Yeol
    • Journal of Magnetics
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    • v.12 no.2
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    • pp.77-80
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    • 2007

  • Recently there was a proposal for a spin filter by using the spin superlattice structure. In a certain energy range, the proposed structure exhibits a high spin filtering efficiency close to 100%. Unfortunately such energy range turns out to be narrow. In this paper, we report a method to widen the energy range by using an analogy to optical anti-reflection coating. In optics, it is well known that a stack of alternating layers of two dielectric materials can function as a highly transmissive or reflective filter for wide range of wavelength. Since electrons also have wave character as light, it would be possible to make an electronic analog of an optical filter. We demonstrate that alternating layers of two materials with different g-factors can function as a spin filter that allows electrons to be transmitted only when their spins point towards a certain particular direction. This spin-superlattice-based spin filter operates in wide energy ranges, curing the problem in the previous proposal.

  • https://doi.org/10.4283/JMAG.2007.12.2.077 인용 PDF KSCI

The Vertical Wind Tunnel Test for Spin Mode Improvement of KTX-1 (훈련기 스핀모드 향상을 위한 수직 풍동시험)

  • Ko, Joon-Soo;Chung, In-Jae
    • Journal of Institute of Control, Robotics and Systems
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    • v.11 no.3
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    • pp.228-232
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    • 2005

  • This paper presents the efforts of the studies for improvement of spin characteristics of KTX-1 #02 through rotary balance test, forced oscillation test and spin mode analysis. During the full scale development design stage, we had fullfilled a lot of spin flight test, spin mode analysis. Based on all of the efforts, KTX-1 had been developed as a successful trainer with excellent spin characteristics.

  • https://doi.org/10.5302/J.ICROS.2005.11.3.228 인용 PDF KSCI