• Title/Summary/Keyword: Magnetic nanocomposite

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Nanocomposite magnetic powder materials using mechanochemical Synthesis

  • Soh, Dae-Wha;Mofa, N.N.;Keteguenov, T.A.;Mansurov, Z.A.
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2002.11a
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    • pp.585-587
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    • 2002

  • The materials showing high structure dispersity are developed on the quartz base and they are obtained by mechano-chemical technology. Depending on the processing conditions and subsequent applications the materials produced by mechano-chemical reaction show concurrently magnetic, dielectric and electrical properties. The obtained magnetic-electrical powders classified by aggregate complex of their features as segnetomagnetics, contain a dielectric material as a canγing nucleus, particularly the quartz on that surface one or more layers of different compounds are synthesized having thickness up to 10~50 nm and showing magnetic, electrical and other properties.

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Enhanced Exchange Coupling of $Nd_2Fe_{14}B/Fe_3B$ Magnet Via Magnetic Field Treatment

  • Choong Jin Yang;Con Byung Park
    • Journal of Magnetics
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    • v.1 no.1
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    • pp.31-36
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    • 1996

  • An externally applied magnetic field during heat treating the $Nd_2Fe_{14}B/Fe_3B$ based spring magnet was found to enhance the exchange coupling between the hard and soft magnetic grains. More than 30% increase in $M_r/M_s$ values for melt-spun $Nd_2Fe_{73.5}Co_3$$(Hf_{1-x}Ga_x)B_{18.5}$ (x=0, 0.5, 1) alloys was resulted from a uniform distribution of $Fe_3B, \alpha-Fe$ and $Nd_2Fe_{14}B$ phases, and also from a reduced grain size of those phases by 20%. The externally applied magnetic field induced a uniform distribution of fine grains. A study of Mossbauer effect also report that the enhancement of total magnetization of nanocomposite $Nd_2Fe_{14}B/Fe_3B$ alloys is attributed to an increased formation of $Fe_3$B after magnetic annealing.

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Nanocomposite Magnetic Powder Materials using Mechano-chemical Synthesis

  • Mofa, N.N.;Ketegenov, T.A.;Mansurov, Z.A.;Soh, D.W.
    • Transactions on Electrical and Electronic Materials
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    • v.5 no.1
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    • pp.29-33
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    • 2004

  • The materials showing high structure dispersity have been developed on the quartz base by mechano-chemical technology. Depending on the processing conditions and subsequent applications, the materials produced by mechano-chemical reaction (MCR) showed concurrently magnetic, dielectric and electrical properties. The obtained magnetic-electrical powders classified by aggregate complex of their features as segneto-magnetics, contained a dielectric material as a carrying nucleus, particularly the quartz on that surface one or more layers of different compounds was synthesized having thickness up to 10∼50 nm and showing magnetic properties and etc.

  • https://doi.org/10.4313/TEEM.2004.5.1.029 인용 PDF KSCI