Reconfigurable atom chip on a transparent ferrite-garnet film

Jaakkola, Antti; Shevchenko, Andriy; Lindfors, Klas; Hautakorpi, Markus; Il’yashenko, E. I.; Johansen, T. H.; Kaivola, Matti

doi:10.1140/epjd/e2005-00176-7

Cited by 12 publications

(13 citation statements)

References 25 publications

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“…One exception is a previous study on the use of a transparent and magnetically-hard ferrite-garnet film as an atom chip, where magnetic patterns for the magnetic trapping of atoms were optically written. 25,26 Magnetic garnets are known to be a unique magnetic substance. They are employed as an optical isolator to provide a large Faraday effect in an absorption-free region.…”

Section: Introductionmentioning

confidence: 99%

Optical and magnetic properties of a transparent garnet film for atomic physics experiments

et al. 2016

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We investigated the optical and magnetic properties of a transparent magnetic garnet with a particular focus on its applications to atomic physics experiments. The garnet film used in this study was a magnetically soft material that was originally designed for a Faraday rotator at optical communication wavelengths in the near infrared region. The film had a thickness of 2.1 μm and a small optical loss at a wavelength of λ=780 nm resonant with Rb atoms. The Faraday effect was also small and, thus, barely affected the polarization of light at λ=780 nm. In contrast, large Faraday rotation angles at shorter wavelengths enabled us to visualize magnetic domains, which were perpendicularly magnetized in alternate directions with a period of 3.6 μm. We confirmed the generation of an evanescent wave on the garnet film, which can be used for the optical observation and manipulation of atoms on the surface of the film. Finally, we demonstrated a magnetic mirror for laser-cooled Rb atoms using the garnet film.

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Section: Introductionmentioning

confidence: 99%

Optical and magnetic properties of a transparent garnet film for atomic physics experiments

et al. 2016

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“…Recently, emerging development aimed at using ferrite-garnet films in devices of new generation of spin nanoelectronics at high frequencies [4,5].…”

Section: Introductionmentioning

confidence: 99%

Microanalysis of magnetic structure of yttrium-iron garnet films by using the scanning probe microscopy methods

Synhaivska¹

2016

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. In this paper, the features of the microstructure of magnetic domains observed in ferrite-garnet films (FGF) have been presented. The studied FGF with orientation (111) were grown on gallium-gadolinium substrate by using liquid-phase epitaxy. The study of distribution inherent to magnetic domains was carried out using magnetic force microscopy (MFM) with the scanning probe microscope NanoScope IIIa Dimension 3000 TM . In the course of these researches, optimization of the MFM method was carried out to obtain high-quality and correct images of magnetic domains in FGF. Nanorelief and magnetic microstructure of FGF surface were studied, depending on their thickness, on external magnetic field and doses of boron ion implantation. For these objects, it was established that stripe domain structure is characteristic, the period of which depends on the film thickness. The nature of transformation of domain structure depending on thickness is close to that theoretically predictable at low thicknesses (up to 10 µm). Nanorelief of film surfaces is virtually unchanged depending on thickness. An external magnetic field with the magnitude 4 mT causes significant changes in domain configuration and allows to visualize heterogeneity of magnetic structure. Ion implantation leads to a slight smoothing of nanorelief films (roughness of 0.2 nm) and to more accurate displaying the magnetic microstructure, which is associated with processes of structural ordering under ionic bombardment.Keywords: magnetic force microscopy, stripe domain structure, epitaxial yttrium-iron garnet films, ion implantation.

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“…Recently [2] it has been established that the GF can be the media for formation of erasable micropotentials that assist trapping of "ultracold" neutral atoms (such as 87 Rb). It was shown that some features of GF and conditions of their growth can be used to create new variants of atomic traps [3].…”

Section: Introductionmentioning

confidence: 99%

Layered Garnet Films for Applications in Atomic Traps

et al. 2010

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Layered high-coercive garnet films characterized by a couple of parameters very suitable for creating reconfigurable magnetic atomic traps with new properties are investigated. Non-uniform distribution of inner stresses and chemical composition stratification obtained in the films can be increased technologically to form sublayers for independent local switching by means of thermomagnetic recording. It makes possible to provide more than two magnetic states and create special types of atomic traps with additional "states of freedom". The experience in the films synthesis and experimental thermomagnetic recording for multilevel traps modeling is described.

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Reconfigurable atom chip on a transparent ferrite-garnet film

Cited by 12 publications

References 25 publications

Optical and magnetic properties of a transparent garnet film for atomic physics experiments

Optical and magnetic properties of a transparent garnet film for atomic physics experiments

Microanalysis of magnetic structure of yttrium-iron garnet films by using the scanning probe microscopy methods

Layered Garnet Films for Applications in Atomic Traps

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