Structural and magnetic properties of an InGaAs/Fe$_3$Si superlattice in   cylindrical geometry
  The structure and the magnetic properties of an InGaAs/Fe3Si superlattice in a cylindrical geometry are investigated by electron microscopy techniques, x-ray diffraction and magnetometry. To form a radial superlattice, a pseudomorphic InGaAs/Fe3As bilayer has been released from its substrate self-forming into a rolled-up microtube. Oxide-free interfaces as well as areas of crystalline bonding are observed and an overall lattice mismatch between succeeding layers is determined. The cylindrical symmetry of the final radial superlattice shows a significant effect on the magnetization behavior of the rolled-up layers. 
Ch. Deneke, J. Schumann, R. Engelhard, J. Thomas, C. M\"uller, M. S.   Khatri, A. Malachias, M. Weisser, T. H. Metzger, and ...