Anti-ferromagnetic contrast in NiO (001) studied with threshold photoemission electron microscopy

Veghel, Marijn van; Emmichoven, P.A. Zeijlmans van

doi:10.1016/j.jmmm.2006.08.015

Cited by 6 publications

(5 citation statements)

References 24 publications

(35 reference statements)

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“…22,23 Another feature of the use of the laser-PEEM is that it can be switched immediately between the linear and right/left circular polarizations as well as incident angles. This will offer us a new method for the characterization of both antiferromagnetic 24 and ferromagnetic materials. 25…”

Section: B Linear and Circular Dichroism Imagingmentioning

confidence: 99%

Ultrahigh-spatial-resolution chemical and magnetic imaging by laser-based photoemission electron microscopy

Taniuchi

Kotani

Shin

2015

Review of Scientific Instruments

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We report the first experiments carried out on a new chemical and magnetic imaging system, which combines the high spatial resolution of a photoemission electron microscope (PEEM) with a continuous-wave deep-ultraviolet laser. Threshold photoemission is sensitive to the chemical and magnetic structures of the surface of materials. The spatial resolution of PEEM is limited by space charging when using pulsed photon sources as well as aberrations in the electron optics. We show that the use of a continuous-wave laser enabled us to overcome such a limit by suppressing the space-charge effect, allowing us to obtain a resolution of approximately 2.6 nm. With this system, we demonstrated the imaging of surface reconstruction domains on Si(001) by linear dichroism with normal incidence of the laser beam. We also succeeded in magnetic imaging of thin films with the use of magnetic circular dichroism near the Fermi level. The unique features of the ultraviolet laser will give us fast switching of the incident angles and polarizations of the photon source, which will be useful for the characterization of antiferromagnetic materials as well as ferromagnetic materials.

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Section: B Linear and Circular Dichroism Imagingmentioning

confidence: 99%

Ultrahigh-spatial-resolution chemical and magnetic imaging by laser-based photoemission electron microscopy

Taniuchi

Kotani

Shin

2015

Review of Scientific Instruments

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“…4 Although threshold photoemission electron microscopy (PEEM) has been successfully employed to study FM domains, 5 the observed contrast in AFM systems has not been attributed to a magnetic origin. 6 With the development of ultrabright synchrotron sources, several imaging methods come to fruition either using x-ray magnetic linear dichroism (XMLD) spectroscopy contrast [7][8][9][10][11][12] or directly probing the magnetic order. 13 Nowadays, the XMLD-PEEM is a widely used technique for AFM imaging, because it provides element specificity, high lateral resolution, and the ability to image surface and buried interfaces.…”

mentioning

confidence: 99%

Surface antiferromagnetic domain imaging using low-energy unpolarized electrons

et al. 2011

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We report on the surface antiferromagnetic (AFM) domain imaging of the prototype antiferromagnet NiO(100) using an electron-microscopy-based laboratory method. Coherently exchange-scattered electrons from the surface AFM lattice are utilized in a low-energy electron microscope to resolve the surface domain structure. Direct comparison with x-ray magnetic linear dichroism photoemission electron microscopy demonstrates a complimentary nature. High surface sensitivity combined with improved spatial resolution of this method enables studying of nanosized magnetic domains in NiO(100) thin films and their thickness-dependent evolution.

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“…In bleaching process, the possible transformation from NiOOH to Ni(OH) 2 occurs due to OH -extraction from the film. These results suggest that the electrochromic mechanism of this sol-gel derived NiO film is caused by the insertion/extraction of OH -that can be described by equation (2).…”

Section: Resultsmentioning

confidence: 74%

“…After potential cycling, the roughness of the films obviously increased. This feature originates from the fact that, during a redox reaction, nickel oxide gradually transforms to Ni(OH) 2 (bleach) and NiOOH (color) phase, resulting in the increasing amount of chemical change to short-range ordered phase.…”

Section: Resultsmentioning

confidence: 99%

“…Since the past few decades, nickel oxide (NiO) has attracted considerable attentions due to its excellent properties for important contribution in wide variety of applications such as sensor [1], anti-ferromagnetic material [2], organic photovoltaics [3] and electrochromic devices [4]. NiO is typically one of potential materials for electrochromic (EC) applications.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Zn‐dopant on structural properties and electrochromic performance of sol‐gel derived NiO thin films

Noonuruk

Mekprasart

Pecharapa

2015

Phys. Status Solidi C

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Zn‐doped NiO thin films were prepared by sol‐gel spin‐coating method onto transparent conducting substrates using nickel acetate tetrahydrate and zinc acetate dehydrate as starting precursors. Effects of zinc doping content on the structural, optical and electrochromic properties of NiO films were investigated by X‐ray diffraction, X‐ray photoelectron spectroscopy, field emission‐scanning electron microscope, atomic force microscopy, UV‐VIS spectrophotometer and cyclic voltammetry. The results reveal that Zn doping has significant influence on crystallinity deterioration, surface topography alternation and electrochromic performance of the films. The expansion of active surface area due to reduced crystallinity of the films resulting to the increase of charge transfer in the electrochemical reaction. It is indicated that electrochromic performance of sol‐gel derived NiO films can be ameliorated by the incorporation of Zn additive at specific content. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Anti-ferromagnetic contrast in NiO (001) studied with threshold photoemission electron microscopy

Cited by 6 publications

References 24 publications

Ultrahigh-spatial-resolution chemical and magnetic imaging by laser-based photoemission electron microscopy

Ultrahigh-spatial-resolution chemical and magnetic imaging by laser-based photoemission electron microscopy

Surface antiferromagnetic domain imaging using low-energy unpolarized electrons

Effects of Zn‐dopant on structural properties and electrochromic performance of sol‐gel derived NiO thin films

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