Atomically resolved p(3×1) reconstruction on the W(100) surface imaged with magnetic tips

Murphy, S.; Osing, J.; Shvets, I. V.

doi:10.1016/s0304-8853(98)01199-8

Cited by 11 publications

(5 citation statements)

References 6 publications

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“…T ips made of bulk antiferromagnetic materials such as chromium [1][2][3] have been proposed for spin-polarized scanning tunneling microscopy (SP-STM [4][5][6] ) and have recently been shown to provide magnetic contrast on Cr(001) and Fe/W(110). 7,8) As compared with W tips covered with an ultrathin film of antiferromagnetic material, 6,9,10) they present the advantage of a simpler preparation which does not require a dedicated tip preparation stage.…”

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confidence: 99%

Magnetic Response and Spin Polarization of Bulk Cr Tips for In-Field Spin-Polarized Scanning Tunneling Microscopy

Corbetta

Ouazi

Borme

et al. 2012

Jpn. J. Appl. Phys.

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In non-abelian gauge theories without matter fields, expectation values of large Wilson loops and loop correlation functions are difficult to compute through numerical simulation, because the signal-to-noise ratio is very rapidly decaying for increasing loop sizes. Using a multilevel scheme that exploits the locality of the theory, we show that the statistical errors in such calculations can be exponentially reduced. We explicitly demonstrate this in the SU(3) theory, for the case of the Polyakov loop correlation function, where the efficiency of the simulation is improved by many orders of magnitude when the area bounded by the loops exceeds 1 fm 2 .

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confidence: 99%

Magnetic Response and Spin Polarization of Bulk Cr Tips for In-Field Spin-Polarized Scanning Tunneling Microscopy

Corbetta

Ouazi

Borme

et al. 2012

Jpn. J. Appl. Phys.

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“…For example, in Spin Polarized STM (SP-STM) measurements, ferromagnetic or anti-ferromagnetic tips exhibiting an intrinsic spin polarization have to be used. Usual ferromagnetic tips are made of Fe [2], Ni [3], Co [4] or Fe coated W tips [5], while anti-ferromagnetic tips have been prepared using MnNi [6], MnPt [7], Cr [8,9,10], Cr-coated [11] or Mn-coated [12] W tips . Anti-ferromagnetic materials are usually preferred because they do not exhibit significant perturbing stray field and are not influenced by external fields.…”

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confidence: 99%

Bulk Cr tips for scanning tunneling microscopy and spin-polarized scanning tunneling microscopy

Bassi

Casari

Cattaneo

et al. 2007

Applied Physics Letters

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A simple, reliable method for preparation of bulk Cr tips for Scanning Tunneling Microscopy (STM) is proposed and its potentialities in performing high-quality and high-resolution STM and Spin Polarized-STM (SP-STM) are investigated. Cr tips show atomic resolution on ordered surfaces. Contrary to what happens with conventional W tips, rest atoms of the Si(111)-7×7 reconstruction can be routinely observed, probably due to a different electronic structure of the tip apex. SP-STM measurements of the Cr(001) surface showing magnetic contrast are reported. Our results reveal that the peculiar properties of these tips can be suited in a number of STM experimental situations.

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“…The tips were rinsed with distilled water and inserted into the UHV system where they were cleaned with 1 keV Ar ϩ ions prior to use. This technique improves upon earlier preparation procedures developed in our laboratory, 13,14 to produce tips with a lower aspect ratio and with tip apexes lying in the 50-100 nm range. SEM images of a MnNi tip prepared in this fashion are shown in Fig.…”

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confidence: 97%

Scanning tunneling microscopy studies of the Fe3O4(001) surface using antiferromagnetic probes

Mariotto

Ceballos

Murphy

et al. 2003

Journal of Applied Physics

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We have studied the ͑001͒ surface of a Fe 3 O 4 single crystal using low-energy electron diffraction ͑LEED͒, Auger electron spectroscopy ͑AES͒ and scanning tunneling microscopy ͑STM͒. The STM measurements were performed using a novel tip of antiferromagnetic MnNi alloy. Atomically resolved STM images provide evidence of a surface terminated at the octahedral plane, with rows of Fe cations running along the ͗110͘ crystallographic axes. Two different kinds of Fe cations with a separation of 6 Å were imaged, while the periodicity between Fe cations of the same kind is about 12 Å. We propose an interpretation of the anomalous corrugation observed in terms of a spin polarized effect, resulting in magnetic contrast between Fe 2ϩ and Fe 3ϩ ions in octahedral coordination.

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Atomically resolved p(3×1) reconstruction on the W(100) surface imaged with magnetic tips

Cited by 11 publications

References 6 publications

Magnetic Response and Spin Polarization of Bulk Cr Tips for In-Field Spin-Polarized Scanning Tunneling Microscopy

Magnetic Response and Spin Polarization of Bulk Cr Tips for In-Field Spin-Polarized Scanning Tunneling Microscopy

Bulk Cr tips for scanning tunneling microscopy and spin-polarized scanning tunneling microscopy

Scanning tunneling microscopy studies of the Fe3O4(001) surface using antiferromagnetic probes

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