Creating Ioffe-Pritchard micro-traps from permanent magnetic film with in-plane magnetization
Van der Waals-Zeeman Institute, University of Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands
Corresponding author: a firstname.lastname@example.org
Published online: 3 May 2005
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 μm 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 87Rb 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.
PACS: 03.75.Be – Atom and neutron optics / 39.25.+k – Atom manipulation (scanning probe microscopy, laser cooling, etc.) / 75.70.-i – Magnetic properties of thin films, surfaces, and interfaces
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005