Fabrication of submicron-scale manganese–nickel tips for spin-polarized STM studies

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

doi:10.1016/s0169-4332(98)00852-6

Cited by 25 publications

(15 citation statements)

References 9 publications

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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.…”

Section: Resultsmentioning

confidence: 86%

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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Section: Resultsmentioning

confidence: 86%

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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“…studies, functionalized probes from other materials are fabricated. For example, GaAs [40,41], InAs [42], Nb [43], MnNi [44], MnPt [45], Fig. 15.3 A schematic of STM imaging with a nonideal tip.…”

Section: Preparation Of Tips and Samples For High-resolution Stm Expementioning

confidence: 99%

High Resolution STM Imaging

Чайка

2015

Surface Science Tools for Nanomaterials Characterization

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“…7,8 The wedge-shaped Fe islands provide a gradually increasing local film thickness, while maintaining a flat Fe͑110͒ surface that is unbroken by steps. By scanning this surface at room temperature with a ferromagnetic or antiferromagnetic STM tip, [37][38][39][40] it may be possible to obtain topographic contrast at the thin end of each Fe island on the basis of the different magnetic order of the first and second layers. This contrast would not be apparent in STM images taken at temperatures below the Curie temperature of the first Fe layer.…”

Section: Spin-polarized Stmmentioning

confidence: 99%

Morphology and strain-induced defect structure of ultrathin epitaxial Fe films on Mo(110)

et al. 2002

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Fe films in a coverage range of 0.4рр4.7 ML were deposited on a Mo͑110͒ substrate in the 300рT р700 K temperature range. It is found that growth around 300 K is mediated by the step-flow growth mechanism, in contrast with previous studies of the Fe/Mo͑110͒ and Fe/W͑110͒ systems, where growth at 300 K was mediated by two-dimensional island nucleation and coalescence. This difference is attributed to the slightly higher substrate temperature ͑between 300 and 345 K͒ during deposition. A transition from layer-bylayer to Stranski-Krastanov growth is observed in films grown in the 300рTр345 K range at around a 1.8 ML coverage. Strain-relieving dislocation defects appear along the ͓001 ͔ direction in the second Fe layer and develop with increasing film thickness into a dislocation network at around a 2.4 ML coverage. The dislocation defects in the second Fe layer act as preferential nucleation sites for third layer islands. At elevated temperatures (495рTр700 K), the first and second Fe layers are formed by the step-flow growth mechanism. Subsequent coverages are characterized by the formation of distinctive wedge-shaped islands supported on an Fe monolayer. A two-dimensional dislocation network is formed in the fourth Fe layer of these islands, from an array of closely-spaced dislocation lines in the third layer. Similar to the Fe/W͑110͒ system, the magnetic properties of these films are expected to vary significantly on the nanometer scale and they are therefore potential candidates for spin-polarized scanning tunneling microscopy studies.

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Fabrication of submicron-scale manganese–nickel tips for spin-polarized STM studies

Cited by 25 publications

References 9 publications

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

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

High Resolution STM Imaging

Morphology and strain-induced defect structure of ultrathin epitaxial Fe films on Mo(110)

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