Fabrication of magnetic atom chips based on FePt
Y. T. Xing, I. Barb, R. Gerritsma, R. J. C. Spreeuw, H. Luigjes, Q. F., Xiao, C. Retif, and J. B. Goedkoop
TL;DR
This paper presents the design and fabrication of all-magnetic atom chips using FePt, demonstrating their effectiveness in ultracold atom trapping through experimental realization of a mirror magneto-optical trap.
Contribution
It introduces a novel fabrication method for magnetic atom chips using FePt and demonstrates their application in ultracold atom trapping.
Findings
Successful fabrication of FePt-based magnetic atom chips
Realization of a mirror magneto-optical trap using the chips
Design considerations for magnetic trapping patterns
Abstract
We describe the design and fabrication of novel all-magnetic atom chips for use in ultracold atom trapping. The considerations leading to the choice of nanocrystalline exchange coupled FePt as best material are discussed. Using stray field calculations, we designed patterns that function as magnetic atom traps. These patterns were realized by spark erosion of FePt foil and e-beam lithography of FePt film. A mirror magneto-optical trap (MMOT) was obtained using the stray field of the foil chip.
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