Fundamental studies of magnetism down to the atomic scale: present status and future perspectives of spin-polarized scanning tunneling microscopy

Wiesendanger, R.; Bode, Matthias; Kubetzka, André; Pietzsch, O.; Morgenstern, Markus; Wachowiak, Andre; Wiebe, Jens

doi:10.1016/j.jmmm.2003.12.817

Cited by 14 publications

(4 citation statements)

References 24 publications

(23 reference statements)

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“…8b and c) that the preferred elongation direction [001] does not change. A similar behavior concerning the anisotropic elongation due to the heating of the deposited system was observed for continuous Fe films 25–27. At temperatures of about 1000 K a transition from thin films to islands is present.…”

Section: Resultssupporting

confidence: 73%

Influence of substrate and temperature on the shape of deposited Fe, Co, and FeCo nanoparticles

Rosellen¹,

Kleinhans²,

Hückelkamp³

et al. 2010

Physica Status Solidi (b)

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In situ scanning tunneling measurements have been carried out on mass-filtered supported Fe, Co, and FeCo alloy nanoparticles with diameters between 4 and 14 nm. These nanoparticles are prepared from the gas phase using a continuously working cluster source and are subsequently deposited on bare W(110) and Ni(111)/W(110) surfaces. The size and the crystallographic structure before deposition are determined by high resolution transmission electron microscopy (HRTEM), the height of the nanoparticles on the substrate by scanning tunneling microscopy (STM). Depending on the substrate the particles do not maintain their spherical shape after deposition. The melting at elevated temperatures results in an anisotropic elongation along the [001] direction of the W(110) substrate.STM illustration of large Co nanoparticles deposited on an atomically flat W(110)-surface.

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Section: Resultssupporting

confidence: 73%

Influence of substrate and temperature on the shape of deposited Fe, Co, and FeCo nanoparticles

Rosellen¹,

Kleinhans²,

Hückelkamp³

et al. 2010

Physica Status Solidi (b)

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“…The insets show the spin-up ͑upper part͒ and spin-down ͑lower part͒ density of states of CrO 2 and the Cr͑001͒ surface. From Wiesendanger, Bürgler, Tarrach, Wadas, et al, 1991. netic atomic layers of Fe͑001͒ epitaxially grown on W͑001͒ substrates ͑Kubetzka et al, 2005;Bode, Vedmedenko, et al, 2006͒, and 1994bWiesendanger and Bode, 2001;Bode, 2003;Wiesendanger et al, 2004;Wulfhekel, 2005;Schwarz et al, 2007͒. Simultaneously …”

Section: ͑25͒mentioning

confidence: 99%

Spin mapping at the nanoscale and atomic scale

2009

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The direct observation of spin structures with atomic-scale resolution, a long-time dream in condensed matter research, recently became a reality based on the development of spin-sensitive scanning probe methods, such as spin-polarized scanning-tunneling microscopy ͑SP-STM͒ and magnetic exchange force microscopy ͑MExFM͒. This article reviews the basic principles and methods of SP-STM and MExFM and describes recently achieved milestones in the application of these techniques to metallic and electrically insulating magnetic nanostructures. Discoveries of novel types of magnetic order at the nanoscale are presented as well as challenges for the future, including studies of local spin excitations based on spin-resolved inelastic tunneling spectroscopy and measurements of damping forces in MExFM experiments.

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“…Then applying Eq. 2, the tunneling current I t,max ∼ (4×4 + 2×2)( 1 6 ) = 20 6 (units of current), for the case of parallel tip and sample spin. The convolution in the anti-parallel case (Eq.…”

Section: Principle Of Spin-polarized Scanning Tunneling Microscopymentioning

confidence: 99%

Atomic-Scale Spin-Polarized Scanning Tunneling Microscopy and Atomic Force Microscopy: A Review

Smith¹

2006

Journal of Scanning Probe Microscopy

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Atomic-scale spin-polarized scanning tunneling microscopy is a powerful real-space technique for investigating the magnetic structure of surfaces. With its intrinsic lateral resolution capability, this technique can achieve atomic-scale resolved spin resolution of surfaces. Antiferromagnets, in particular, offer opportunities to test the spatial resolution of magnetism at ultimate length scales, where the magnetization reverses on the scale of one atomic spacing. But in addition, the technique has been applied with very interesting results to the case of ferromagnetic surfaces. Reviewed here are the various contemporary experimental results, including a discussion of the theoretical basis for atomic-scale magnetic imaging. Theoretical calculations to simulate the magnetic STM images are also discussed, including those calculations which take into account the tip electronic structure.

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Fundamental studies of magnetism down to the atomic scale: present status and future perspectives of spin-polarized scanning tunneling microscopy

Cited by 14 publications

References 24 publications

Influence of substrate and temperature on the shape of deposited Fe, Co, and FeCo nanoparticles

Influence of substrate and temperature on the shape of deposited Fe, Co, and FeCo nanoparticles

Spin mapping at the nanoscale and atomic scale

Atomic-Scale Spin-Polarized Scanning Tunneling Microscopy and Atomic Force Microscopy: A Review

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