4.2 Hard magnetic materials
4.2 Hard magnetic materials
4.2 Hard magnetic materials
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Magnetic properties of R-T intermetallics<br />
3. R-T magnets<br />
Effective <strong>magnetic</strong> moments of rare earth metals are<br />
given by μeff<br />
= gμB<br />
. J( J + 1)<br />
For less than half J = L –S<br />
For more than half J = L + S<br />
Exchange coupling of R and T atoms<br />
Antiferro<strong>magnetic</strong> coupling<br />
between T and R spins.<br />
I s<br />
T c
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