Photoelectron Diffraction in Magnetic Linear Dichroism

Hillebrecht, F. U.; Rose, H. B.; Kinoshita, Toyohiko; Idzerda, Y. U.; Laan, G. van der; Denecke, R.; Ley, L.

doi:10.1103/physrevlett.75.2883

Cited by 62 publications

(36 citation statements)

References 19 publications

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“…Angular acceptance was Ϯ0.5°and overall energy resolution was 200 meV; base pressure was in the 10 Ϫ11 mbars range. Complete MLDAD data sets were obtained from polycrystalline Fe grown on Fe 30 Ni 50 B 20 , providing reference spectra, free from PED modulations, i.e., modulated only by the atomic photoionization angular matrix elements. 28 Clean ͑carbon and sulfur free͒ Fe͑100͒ surfaces were obtained by sputtering-annealing cycles (Ar ϩ 1 keV, 600°C), as well as by monitoring the Auger lines of principal contaminants.…”

Section: Methodsmentioning

confidence: 99%

“…9,22 Highly reliable MLDAD results have been obtained by performing experiments in a fixed geometry, so as to limit the influence of diffraction effects. 10 However, other experiments were performed to show the presence of strong PED effects on TM crystal surfaces [20][21][22] and have been discussed with the support of full multiple-scattering calculations on representative clusters. 21 At present, the main experimental evidences may be summarized as follows.…”

Section: Mldad and Photoelectron Diffractionmentioning

confidence: 99%

“…it is not placed at normal emission. 20,21 The origin of the sign reversal of MLDAD was tentatively ascribed to PED effects, and the possibility of exploiting this fact to separate bulk and surface contributions in the dichroic signal was pointed out. 22 It is worth noting that most of the MLDAD-PED experiments reported in the literature have been performed using h ϭ1253 eV or hϭ1484 eV from Mg and Al K␣ radiation yielding photoelectron kinetic energies high enough to justify a kinematic analysis that neglects multiple-scattering effects and considers the forward-scattering intensities as the prevailing contribution in PED.…”

Section: Mldad and Photoelectron Diffractionmentioning

confidence: 99%

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Surface and bulk contributions in magnetic linear dichroism in the angular dependence from ferromagnetic transition metals

et al. 2002

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The effects of photoelectron diffraction on the magnetic linear dichroism in the angular distribution ͑MLDAD͒ signal have been measured for experiments on crystalline iron and cobalt. Experimental photoemission data of Fe 3p and Co 3p core levels have been obtained in chiral geometry from bulk Fe͑100͒ and from Co/Fe͑100͒ and Fe/Co/Fe͑100͒ epitaxial interfaces. A prominent forward-scattering peak is observed at normal emission and, correspondingly, a severe reduction of the Fe and Co magnetic dichroism asymmetry. The comparison between full multiple-scattering calculations and experimental results provides a rationale for understanding the role of photoelectron diffraction in MLDAD experiments. In this connection we show that both surface and bulk atoms contribute to the measured dichroic signal, but the line shape of bulk contribution to the spectra can be retrieved.

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Section: Methodsmentioning

confidence: 99%

Section: Mldad and Photoelectron Diffractionmentioning

confidence: 99%

Section: Mldad and Photoelectron Diffractionmentioning

confidence: 99%

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Surface and bulk contributions in magnetic linear dichroism in the angular dependence from ferromagnetic transition metals

et al. 2002

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“…Common techniques in this context involve measuring magnetic dichroism, that is, the fractional change in photoelectron intensity either when the magnetization of the sample is reversed [54] or when the light polarization is changed (e.g., from left to right circularly polarized light [101]). …”

Section: Spin Effectsmentioning

confidence: 99%

Overview of core and valence photoemission

Schattke¹,

Hove²,

Abajo³

et al. 2003

Solid‐State Photoemission and Related Methods

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“…The magnetic properties of interface structures were analyzed by a surface-sensitive method based on magnetic linear dichroism ͑MLD͒ in Fe 3p core-level photoemission. [58][59][60][61][62][63][64] …”

Section: Introductionmentioning

confidence: 99%

Magnetic ordering of the Fe/Si interface and its initial formation

Pronin

Gomoyunova

Malygin

et al. 2008

Journal of Applied Physics

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High-resolution photoelectron spectroscopy with synchrotron radiation and magnetic linear dichroism in Fe 3p core-level photoemission has been used to study both the initial stages of Fe/Si(111)7×7 and Fe/Si(100)2×1 interface formation and their ferromagnetic ordering. The correlation between the phase composition, electronic structure, and magnetic behavior of the interfaces has been established. It is shown that in-plane ferromagnetic ordering of the interfaces has a threshold nature and arises after the deposition of ∼7 Å Fe in both systems. However, the remanent magnetization of Fe/Si(111) is greater than that of Fe/Si(100) due to the difference in the chemistry of the phases being formed. In the former case, it was found that at room temperature an ultrathin metastable FeSi film with the CsCl structure grows at the first stage of Fe deposition on Si. At higher Fe coverages, a Si solid solution in iron, and later an Fe film, is found to develop on FeSi. The magnetic properties of the solid solution and the Fe film of ∼15 Å thick are quite similar. At the Fe/Si(100) interface, we observe the formation of iron-rich Fe3Si, in which the average magnetic moment of Fe atoms is markedly lower than that of the Fe film. Solid-phase reactions, starting at ∼100 °C in both systems, lead to a gradual conversion of ferromagnetic phases to the nonmagnetic ε-FeSi phase, which transforms to β-FeSi2 at temperatures above 600 °C.

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Photoelectron Diffraction in Magnetic Linear Dichroism

Cited by 62 publications

References 19 publications

Surface and bulk contributions in magnetic linear dichroism in the angular dependence from ferromagnetic transition metals

Surface and bulk contributions in magnetic linear dichroism in the angular dependence from ferromagnetic transition metals

Overview of core and valence photoemission

Magnetic ordering of the Fe/Si interface and its initial formation

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