온도에 안정하고 잡음이 적은 메모리코어에 대한 연구

Temperature Stable, Low Ringing Noise Memory Cores

  • 임호빈 (한국과학원 재료공학과)
  • 발행 : 1978.02.01

초록

$Zn_{0.105}Co_{0.025}Li_{0.435-1/2x}Ni_x Fe_{2.435-1/2x-y }Mn_y O_4$ 조성의 메모리코어 특성과 $Nb_2O_5$$V_2O_5$의 소량 첨가가 square-loop성질에 주는 영향을 연구하였다. 위의 조성에서 닉켈의 양 x는 0에서 0.15까지, 그리고 망간의 양 y는 0.05에서 0.25까지 변화시켰다. $Nb_2O_5$$V_2O_5$의 양은 각각 위의 화학식에 대하여 0.005에서 0.015까지 변화시켰다. 실험결과에 의하면 $Mn^{+3}$를 octahedral자리에 첨가하였을 때에는 잡음이 감소되었고 메모리코어 squareness와 보자련의 온도계수가 증가하였다. 닉켈을 첨가하였을 때에는 메모리코어의 squareness와 잡음이 증가하였다. $Nb_2O_5$를 소량 첨가하였을 때에는 square-loop성질이 개선되었음에 비하여 $V_2O_5$를 소량 첨가하였을 때에는 square-loop성질이 나빠졌다.

키워드

참고문헌

  1. IEEE Transadtions on Magnetics v.MAG-5 no.4 Ferrite Memory Materials A.P. Greifer
  2. Magnetic Properties of Materials Square-Loop Ferrites R.S. Weiss;J. Smit(Ed.)
  3. J. Appl. Phys. v.35 Square-Loop Properties of Materials in the System NiFe₂O₄-Fe₃O₄MnFe₂O₄ H.B. Im;D.G. Wickham
  4. IEEE Transactions on Magnetics v.MAG-5 Temperature-Stable Low-Noise Ferrite Memory Cores T. Kawashima
  5. IEEE Transactions on Magnetic v.MAG-8 no.4 Memory-Core Characteristics of Cobalt Subsituted Lithium Ferrite H.B. Im;D.G. Wickh5m
  6. IEEE. Transactions on Magnetics v.MAG-10 no.1 A Note on the Magnetostrictive Ringing in Core Memory Systems H.B. Im
  7. Philips Tech. Rev. v.16 Conditions for Square Hysteresis Loops in Ferrites H.P.J. Wijn;E.W. Gorter;C.J. Esveldt;D. Geldermans
  8. Ampex Restricted RB 65-20 On the Conditions for Square Hysteresis Loops in Polycrystalline Ferrites and Their Application in Ni-Mn Ferrites and Li-Mn Ferrites H.B. Im
  9. J. Appl. Phys. v.40 Magnetic Anisotropy and Magnetostriction Constants of Substituted Lithium Ferrites at 300°K G.F. Dionne
  10. Izv. Vyssh. Ucheb. Zaved. Fiz v.10 no.8 Yu. N. Kotyukov
  11. J. Appl. Phys. v.42 Magnetostriction Contants of Cubic Ferrites Containing only Fe³+ as Magnetic Ions N. Tsuya;K.I. Arai
  12. J. Appl. Phys. v.37 Magnetostriction in Nickel Ferrite and Nickel Cobalt Ferrite A.B. Smith;R.V. Jones
  13. Loc. Cit R.S. Weiss
  14. Philips Res. Repts. v.12 Controlled Crystal Anisoropy and Controlled Temperature Dependence of the Permeability and Elasticity of Various Cobalt Subsituted Ferrites C.M. Van der Burgt
  15. J. Appl. Phys. v.38 Magnetoelastic Resonances in Ferrite Memory Cores E.L. Boyd
  16. U.S. Patent 3 300 411 D.G. Wickham;H.B. Im
  17. Japan Kokai 76 80 997 Kumada Masaharu
  18. Poroshkovaya Metallurgia v.8 Formation of Microstructure and its Effects on the Properties of Lithium-Containing RectangularHysteresis-Loop Ferrites L.M. Letyuk
  19. Izvestiva Akademii Nauk SSR, Neorganicheskie Materialy v.12 no.11 Influence of Low-Melting Additives on Microsture Formation and Properties of Ferrites with Rectangular Hysteresis Loops L.M. Letyuk;S.S. Gorelik;E.A. Babich;V.A. Nifontov