Magnetic Circular Dichroism of Ni-Pd Alloys in Ni2p,3p, Pd3p, and4pCore Excitation Regions: Enhancement of Ni3dOrbital Moment

Park, Serng-Yerl; Muto, S.; Kimura, Akio; Imada, S.; Kagoshima, Yasushi; Miyahara, Tsuneaki; Hatano, Tadashi; Hanyu, Takaaki; Shiozaki, Ikuyo

doi:10.1143/jpsj.64.934

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…In addition, the spectra have broad satellites at energies higher than each absorption edge. Such features of the spectra are consistent with the experimental results of Pd-Ni and Pd-Fe alloys [28,29]. According to the band calculation, the origin of the satellites is explained based on p-d hybridization [30].…”

Section: Resultssupporting

confidence: 87%

X-ray magnetic circular dichroism study on ferromagnetic Pd nanoparticles

Oba¹,

Okamoto²,

Sato³

et al. 2008

J. Phys. D: Appl. Phys.

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An x-ray magnetic circular dichroism (XMCD) experiment was performed for freestanding Pd nanoparticles which were prepared in a high purity atmosphere and showed ferromagnetism. We observed the XMCD signal at Pd M2,3 absorption edges of nanoparticles. This is clear experimental evidence of ferromagnetic moment in pure Pd. Using the sum rules, the ratio of orbital to spin magnetic moments mL/mS of ∼0.1 was obtained. In the x-ray absorption spectrum, the intensities of white lines increased in Pd nanoparticles relative to the bulk. This shows the increase in the number of unoccupied 4d states nh which can contribute to the appearance of ferromagnetism in Pd.

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Section: Resultssupporting

confidence: 87%

X-ray magnetic circular dichroism study on ferromagnetic Pd nanoparticles

Oba¹,

Okamoto²,

Sato³

et al. 2008

J. Phys. D: Appl. Phys.

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“…20 In these systems a relative difference in absorption for left-and right-circularly polarized radiation R L 2,3 of up to 20% has been found. The first experimental investigation of XMCD at the L 2,3 edge of pure Ni have been done by Chen et al 18 Many different systems have been investigated experimentally so far, such as various diluted and concentrated alloy systems ͑Fe in Fe x Pd 1−x , 99 Co in Co x Pd 1−x , 99 Ni in Ni x Pd 1−x , 99 Cr, Mn, Fe and Co in Ni, 100 ͒ compounds and multilayer systems ͑Fe and V in Fe/ V, 101,102 Co in Co/ Ni, Co/ Pd, Co/ Pt, 103 Co and Cu in Co/ Cu 104 ͒.…”

Section: D Metals and Compoundsmentioning

confidence: 99%

X-ray magnetic circular dichroism in d and f ferromagnetic materials: recent theoretical progress. Part I (Review Article)

Antonov

Shpak

Yaresko

2008

Low Temperature Physics

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Articles you may be interested inRational design of Nb-based alloys for hydrogen separation: A first principles study AIP Advances 3, 022102 (2013); 10.1063/1.4790627 Effects of alloying elements and temperature on the elastic properties of dilute Ni-base superalloys from firstprinciples calculations J. Appl. Phys. 112, 053515 (2012); 10.1063/1.4749406 Thin film reaction of transition metals with germanium J. Vac. Sci. Technol. A 24, 474 (2006); 10.1116/1.2191861 Ab initio study on stability of half-metallic Co-based full-Heusler alloys J. Appl. Phys. 99, 08J112 (2006); 10.1063/1.2176907 X-ray absorption and magnetic circular dichroism studies of annealed magnetic tunnel junctionsThe present state of theoretical understanding of the x-ray magnetic circular dichroism ͑XMCD͒ of 3d compounds is reviewed. Energy band theory based upon the local spin-density approximation ͑LSDA͒ describes the XMCD spectra of transition metal compounds reasonably well. Examples which we examine in detail are XPt 3 compounds ͑with X = V, Cr, Mn, Fe, Co, and Ni͒ in the AuCu 3 structure, the Heusler compounds Co 2 MnGe and Co 2 NbSn, and the compounds with noncollinear magnetic structure IrMnAl and Mn 3 ZnC. Recently achieved improvements for describing the electronic and magnetic structures of 3d compounds are discussed.

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“…Some recent theoretical and experimental papers have reported this orbital moment enhancement. 2,[10][11][12][13] In absolute values, the OM enhancement is smaller than the spin moment enhancement, but the relative change of the orbital moments is much bigger. For instance, Hjortstom et al found in their calculations that in bulk bcc Fe the spin and orbital moments are 2.25 and 0.049 B , respectively, and 2.94 and 0.096 at the bcc Fe ͑001͒ surface.…”

Section: Introductionmentioning

confidence: 99%

Orbital magnetism of transition-metal adatoms and clusters on the Ag and Au(001) surfaces

et al. 2002

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We present ab initio calculations of the orbital moments and magnetocrystalline anisotropy energies for 3d, 4d, and 5d transition-metal adatoms and for some selected small clusters on the ͑001͒ surfaces of Ag and Au. The calculations are based on the local density approximation of density functional theory and apply a fully relativistic Koringa-Kohn-Rostoker Green's function method. Due to the reduced coordination of the adatoms and the weak hybridization with the substrate, we find fairly large orbital moments, in particular for the elements towards the end of the series. The general trend can be understood from a simple tight-binding model. The orbital moments are connected with very large anisotropy energies. While the orbital moments are on the Ag substrate somewhat larger than on Au, the magnetic anisotropy has about the same size for both substrates. Calculations for small clusters of Fe, Ru, and Os adatoms show, that due to interaction effects the orbital moments are strongly reduced, e.g., by 50% for the dimer atoms. The size of the reduction correlates well with the coordination number. Similar reductions also occur for the magnetic anisotropy energies.

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Magnetic Circular Dichroism of Ni-Pd Alloys in Ni2p,3p, Pd3p, and4pCore Excitation Regions: Enhancement of Ni3dOrbital Moment

Cited by 7 publications

References 11 publications

X-ray magnetic circular dichroism study on ferromagnetic Pd nanoparticles

X-ray magnetic circular dichroism study on ferromagnetic Pd nanoparticles

X-ray magnetic circular dichroism in d and f ferromagnetic materials: recent theoretical progress. Part I (Review Article)

Orbital magnetism of transition-metal adatoms and clusters on the Ag and Au(001) surfaces

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