Local atomic order and element-specific magnetic moments of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mtext>Fe</mml:mtext></mml:mrow><mml:mn>3</mml:mn></mml:msub><mml:mtext>Si</mml:mtext></mml:mrow></mml:math>thin films on MgO(001) and GaAs(001) substrates

Krumme, B.; Weis, C.; Herper, Heike C.; Stromberg, F.; Antoniak, C.; Warland, Anne; Schuster, E.; Srivastava, Pankaj; Walterfang, Mark; Fauth, K.; Minář, J.; Ebert, H.; Entel, P.; Keune, W.; Wende, Heiko

doi:10.1103/physrevb.80.144403

Cited by 35 publications

(37 citation statements)

References 34 publications

(37 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note that it is impossible to distinguish between the moments of Fe on lattice sites A and B through analyzing the absorption spectra at the L 3,2 edges since the differences in energy position and spectral shape are marginal. The averaged Fe moment is significantly smaller than in bulk α-Fe and in good agreement to values reported earlier 8 . For a better comparison with our calculations, the magnetic moments obatined from theory were also site-averaged and listed in Tab.…”

Section: Discussionsupporting

confidence: 79%

“…6. As discussed in the literature 8,22 , the two types of Fe atoms have different electronic properties and the Fe-A atoms have a strong effect on the DOS profiles of Si atoms. Interestingly, there are two pronounced peaks in the Si s-DOS curves at about 5 eV above E F , slightly split in two spin channels.…”

Section: B Resultsmentioning

confidence: 99%

“…Fig. 6) as discussed in the literature on the basis of calculated spin and angular momentum resolved density of states 8 . In the case of Si, L 3 and L 2 edge are not energetically well-separated.…”

Section: B Resultsmentioning

confidence: 99%

“…A perfect D0 3 structure is described by S(D0 3 )= 1 and S(B2)= 2/3, respectively. When grown onto a semiconductor like GaAs, the actual crystal symmetry should be strongly disturbed by interfacial diffusion 7 which influences the electronic and magnetic properties as well 8 . To avoid diffusion of Ga and/or As atoms into the metal, a tunnel-barrier spin-injector was used in this work, i.e.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Induced magnetism on silicon in Fe3Si quasi-Heusler compound

et al. 2012

Self Cite

View full text Add to dashboard Cite

Element-specific magnetic moments of epitaxially grown Fe3Si in D03 crystal symmetry were analyzed by means of x-ray absorption spectroscopy and its associated magnetic circular dichroism. To detect the weak magnetization induced at the Si sites, measurements were performed at both Si K edge and Si L3,2 edges. By band structure calculations based on either the SPR-KKR method or FLAPW with GGA, the spectroscopic features could be reproduced and provide an insight to the underlying physics. In addition, comparison of the experimental data to calculated spectra gave us the possibility to estimate the induced effective spin and orbital magnetic moment of Si in our sample, i.e. µ eff s = (−0.011 ± 0.005) µB and µ l = (−0.003 ± 0.003) µB, respectively. The sign and the order of magnitude of the tiny orbital magnetic moment has been confirmed by application of the magneto-optical sum rule.

show abstract

Section: Discussionsupporting

confidence: 79%

Section: B Resultsmentioning

confidence: 99%

Section: B Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Induced magnetism on silicon in Fe3Si quasi-Heusler compound

et al. 2012

Self Cite

View full text Add to dashboard Cite

show abstract

“…An example of XANES and XMCD measured at the Fe L 3,2 absorption edges of an ensemble of pure metallic 6 nm FePt nanoparticles covered with Al is shown in Figure 4b. A small shoulder that is visible above the L 3 absorption edge around 710 eV could be assigned to a hybridization between Fe d-states and Al sp-states as it is known, for example, for the similar case of Fe d-states and Si sp-states in Fe 3 Si 25 . Evidence for this can be found in the electronic density of states.…”

Section: Resultsmentioning

confidence: 99%

A guideline for atomistic design and understanding of ultrahard nanomagnets

et al. 2011

View full text Add to dashboard Cite

magnetic nanoparticles are of immense current interest because of their possible use in biomedical and technological applications. Here we demonstrate that the large magnetic anisotropy of FePt nanoparticles can be significantly modified by surface design. We employ X-ray absorption spectroscopy offering an element-specific approach to magnetocrystalline anisotropy and the orbital magnetism. Experimental results on oxide-free FePt nanoparticles embedded in Al are compared with large-scale density functional theory calculations of the geometric-and spin-resolved electronic structure, which only recently have become possible on world-leading supercomputer architectures. The combination of both approaches yields a more detailed understanding that may open new ways for a microscopic design of magnetic nanoparticles and allows us to present three rules to achieve desired magnetic properties. In addition, concrete suggestions of capping materials for FePt nanoparticles are given for tailoring both magnetocrystalline anisotropy and magnetic moments.

show abstract