![]() A new development is the use of atom chips which are planar structures of current carrying wires that allow miniaturization of traps and give more control over the cold atom system. The conventional method to produce such a field minimum uses large Helmholtz coils. A lattice with continuously varying lattice constant ranging from 5 μm down to 250 nm has been created to show the wide range of length scales that can now be created with this technique.Ĭold atoms, trapped by a magnetic field minimum, might be the future elements in quantum computing. The resulting lattices are imaged in a scanning electron microscope in the cross-section created by a focused ion beam. Using electron beam lithography and argon ion milling, we create lattice patterns with a period down to 200 nm, and a resolution of 30 nm. A high monocrystalline fraction was measured as well as a strong remanent magnetization of M = 900 kA/m and coercivity of 0.4 T. The films are characterized with X-ray scattering and Mössbauer spectroscopy to determine the long range order parameter and the hard magnetic axes. ![]() We use molecular beam epitaxy to deposit monocrystalline FePt films with a thickness of 50 nm. These structures can be used to trap ultracold atoms for quantum simulation experiments. We report on the epitaxial growth and the characterization of thin FePt films and the subsequent patterning of magnetic lattice structures.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |