- Conference date: 15–18 June 1976
- Location: Pittsburgh, Pennsylvania (USA)
Previous work has shown that the incorporation of 5 wt.% Pb in (100) LPE films results in a large positive uniaxial anisotropy. Similarly, it has been observed that Pb causes large changes in the magnetocrystalline anisotropy constant, K1. On the tensile side of the lattice mismatch, Δa, (0–1.5% Pb), the magnitude of K1 increases with decreasing Δa until at , K1 attains a value of −42,800 ergs/cm3. On the compressive side, , ( ) the magnitude of K1 decreases with increasing compressive Δa, reaching a value of −17500 ergs/cm3 at (5 wt% Pb). There is a discontinuity in K1 near . Approaching from the tensile side, K1 extrapolates to −45000 ergs/cc, while the extrapolated value from the compressive side is −27500 ergs/cm3. Theory predicts a linear behavior for K1 with elastic strain; the proportionality constant being related to the magnetostriction. The observed values of K1 with lattice mismatch are non‐linear and much larger than the values predicted by the theory. It appears therefore that the variation of K1 with Pb content in (100) LPE films is not caused by epitaxial strains, but by a structural modification of the lattice.
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