Creating Ioffe-Pritchard micro-traps from permanent magnetic film with in-plane magnetization

Abstract

We present designs for Ioffe-Pritchard type magnetic traps using planar patterns of hard magnetic material. Two samples with different pattern designs were produced by spark erosion of 40 $\mu$m thick FePt foil. The pattern on the first sample yields calculated axial and radial trap frequencies of 51 Hz and 6.8 kHz, respectively. For the second sample the calculated frequencies are 34 Hz and 11 kHz. The structures were used successfully as a magneto-optical trap for ${}^{87}$Rb and loaded as a magnetic trap. A third design, based on lithographically patterned 250 nm thick FePt film on a Si substrate, yields an array of 19 traps with calculated axial and radial trap frequencies of 1.5 kHz and 110 kHz, respectively.

8 pages, 5 figures Revised and accepted for EPJD, improved pictures

References in corpus (12)

• Atom Chips
• Bose-Einstein Condensation in a Surface Micro Trap
• Impact of the Casimir-Polder Potential and Johnson Noise on Bose-Einstein Condensate Stability near Surfaces
• Guiding Neutral Atoms
• Coherence in Microchip Traps
• Loss and heating of particles in small and noisy traps
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• Thermally induced spin flips above an atom chip
• Thermal spin flips in atom chips
• Atomic spin decoherence near conducting and superconducting films
• Micron-sized atom traps made from magneto-optical thin films
• Cold atoms in videotape micro-traps

Cited by in corpus (14)

• Realization of a superconducting atom chip
• Permanent magnetic lattices for ultracold atoms and quantum degenerate gases
• Dynamically controlled toroidal and ring-shaped magnetic traps
• Fully permanent magnet atom chip for Bose-Einstein condensation
• Effect of Magnetization Inhomogeneity on Magnetic Microtraps for Atoms
• Cold atoms in videotape micro-traps
• Topological constraints on magnetostatic traps
• Trapping atoms on a transparent permanent-magnet atom chip
• Fabrication of magnetic atom chips based on FePt
• A class of permanent magnetic lattices for ultracold atoms
• Stability of a Magnetically Levitated Nanomagnet in Vacuum: Effects of Gas and Magnetization Damping
• Experiments on a videotape atom chip: fragmentation and transport studies
• Deposition and patterning of magnetic atom trap lattices in FePt films with periods down to 200nm
• Bose-Einstein Condensation on a Permanent-Magnet Atom Chip