• Title/Summary/Keyword: Ferromagnetism

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Determination of the Magnetic Moment of ${\alpha}-Fe_{2}O_{3}$ of the Parasitic Ferromagnetism by the Proton Relaxation in Water (물의 양성자완화에 의한 기생 강자성 ${\alpha}-Fe_{2}O_{3}$의 자기능률 결정)

  • Yong-Jin Kim;Jung-Gi Kim
    • Journal of the Korean Magnetics Society
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    • v.4 no.3
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    • pp.282-284
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    • 1994

  • A theoretical expression for determining the effective magnetic moment of hematite(${\alpha}-Fe_{2}O_{3}$) particle of the parasitic ferromagnetism by the proton relaxation in water is derived. In deriving the expression it is found that the mathematical procedures are exactly the same as those applied for aqueous solutions containing free paramagnetic ions, except that the distance between the proton spin of water molecule and the corresponding electronic spin of the particle must be considered to be a radius vector rather than a relative distance. And it is also found that the average effective magnetic moment of the particle calculated by the expression is in good agreement with the experimental value determined by Hirai.

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