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L06-page2 - • At the atomic level materials have a net...

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2 Induced magnetization (J I ) and magnetic susceptibility • A magnetizable body acquires magnetization when H field is applied – Disappears when field is removed – Field ‘induces’ magnetization in material • The induced magnetization is parallel and proportional to H: J I = κ H (due to the earth: J I = κ F/ µ o ) k = susceptibility k = µ r -1 – Dimensionless, however, k SI =4 π k cgs Cause of magnetic susceptibility
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Unformatted text preview: • At the atomic level, materials have a net magnetic moment due to: – Rotation of electrons in various shells around nucleus – The spin of the electrons – Number of electrons in each shell – That is, it is a quantum effect • All of above result that each atomic nucleus can be though of as a small magnetic dipole with its own moment...
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