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

Barb, I.; Gerritsma, R.; Xing, Yutao; Goedkoop, J. B.; Spreeuw, R. J. C.

doi:10.1140/epjd/e2005-00055-3

Cited by 23 publications

(20 citation statements)

References 27 publications

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“…Our trapping configuration is based on magnetic micro-structures, which have been proposed and demonstrated for atom trapping both using current-carrying wires [25,26,27] and permanent magnetic structures [28,29,30]. We start from a ring-shaped magnetic quadrupole field, generated by two concentric rings of magnetized material with out-of-plane magnetization M; see Fig.…”

Section: Trap Designmentioning

confidence: 99%

Dynamically controlled toroidal and ring-shaped magnetic traps

et al. 2007

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We present traps with toroidal (T 2 ) and ring-shaped topologies, based on adiabatic potentials for radio-frequency dressed Zeeman states in a ring-shaped magnetic quadrupole field. Simple adjustment of the radio-frequency fields provides versatile possibilities for dynamical parameter tuning, topology change, and controlled potential perturbation. We show how to induce toroidal and poloidal rotations, and demonstrate the feasibility of preparing degenerate quantum gases with reduced dimensionality and periodic boundary conditions. The great level of dynamical and even state dependent control is useful for atom interferometry.

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Section: Trap Designmentioning

confidence: 99%

Dynamically controlled toroidal and ring-shaped magnetic traps

et al. 2007

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“…[17][18][19] Previously, the films of FePt ranging in thickness from 200 to 400 nm were deposited by sputtering techniques. 20 These films were not compatible with the structures in the few 100 nm range, due to their thickness, flatness, and grain size. Therefore, new films were deposited by molecular beam epitaxy (MBE).…”

Section: Molecular Beam Epitaxy Of Mono-crystalline Fept Filmsmentioning

confidence: 99%

Deposition and patterning of magnetic atom trap lattices in FePt films with periods down to 200 nm

Rooij

Couet

Krogt

et al. 2018

Journal of Applied Physics

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We report on the epitaxial growth and the characterization of thin FePt films and the subsequent patterning of magnetic lattice structures. These structures can be used to trap ultracold atoms for quantum simulation experiments. We use molecular beam epitaxy to deposit monocrystalline FePt films with a thickness of 50 nm. The films are characterized with X-ray scattering and M€ ossbauer spectroscopy to determine the long range order parameter and the hard magnetic axes. A high monocrystalline fraction was measured as well as a strong remanent magnetization of M ¼ 900 kA/m and coercivity of 0.4 T. 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. The resulting lattices are imaged in a scanning electron microscope in the cross-section created by a focused ion beam. A lattice with continuously varying lattice constant ranging from 5 lm down to 250 nm has been created to show the wide range of length scales that can now be created with this technique.

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“…Assuming a wire resistance of 2 Ω and a steadystate current of 1.5 A, the resulting power dissipation is more than 4 W (ignoring the additional power needed to generate external bias fields). One way to mitigate this loss is to use a planar configuration of permanent magnets on the chip as the final trap [32]. Chip wires can then be used for the much shorter stage of transferring atoms to the chip.…”

Section: Description Of Proposed Apparatusmentioning

confidence: 99%

A compact microchip atomic clock based on all-optical interrogation of ultra-cold trapped Rb atoms

Farkas¹,

Zozulya

Anderson³

2010

Appl. Phys. B

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We propose a compact atomic clock based on ultracold Rb atoms that are magnetically trapped near the surface of an atom microchip. An interrogation scheme that combines electromagnetically-induced transparency (EIT) with Ramsey's method of separated oscillatory fields can achieve atomic shot-noise level performance of 10 −13 / √ τ for 10 6 atoms. The EIT signal can be detected with a heterodyne technique that provides noiseless gain; with this technique the optical phase shift of a 100 pW probe beam can be detected at the photon shot-noise level. Numerical calculations of the density matrix equations are used to identify realistic operating parameters at which AC Stark shifts are eliminated. By considering fluctuations in these parameters, we estimate that AC Stark shifts can be canceled to a level better than 2 × 10 −14 . An overview of the apparatus is presented with estimates of duty cycle and power consumption. arXiv:0912.4231v1 [physics.atom-ph]

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

Abstract: 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 µm thick

Cited by 23 publications

References 27 publications

Dynamically controlled toroidal and ring-shaped magnetic traps

Dynamically controlled toroidal and ring-shaped magnetic traps

Deposition and patterning of magnetic atom trap lattices in FePt films with periods down to 200 nm

A compact microchip atomic clock based on all-optical interrogation of ultra-cold trapped Rb atoms

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