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

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

2005-01-20

arxiv.org/abs/physics/0501109v2

Eur. Phys. J. D 35, 75--79 (2005)

Physics

Atomic Physics

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

Scientific paper

10.1140/epjd/e2005-00055-3

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.

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