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The "elastic" properties of lattices of reversely magnetized perfectly cylindrical domains (bubbles) are studied. Expressions are presented for the "elastic" constants determining the forces resulting from displacements in a general bubble lattice. Numerical results are given for the hexagonal (triangular) lattice and for various bubble spacings. "Elastic" wave phenomena in these lattices are investigated and the velocities of propagation are determined under the assumptions that the domain-wall damping and the coercive field can be neglected. Finally, an estimate is made of the attenuation properties and of the quality factor of a resonating bubble lattice of finite dimensions.

Results are reported of 2 γ angular correlation measurements in magnetized iron single crystals. The spin density distribution, as seen by the positron, has been obtained up to the l = 6 term and is compared with existing band structure calculations. The features in the momentum distribution, customarily ascribed to a negative conduction electron polarization, are interpreted in terms of the exchange polarization of the 3 d wave functions

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