Photoelectron spectroscopy of manganese-based Heusler alloys

Brown, D. S.; Crapper, M.D.; Bedwell, K H; Butterfield, M. T.; Guilfoyle, S J; Malins, A.E.R.; Petty, Michael C.

doi:10.1103/physrevb.57.1563

Cited by 30 publications

(13 citation statements)

References 37 publications

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“…The DOS does not show the dip and feature A ′ is absent. Thus, surface relaxation and/or anti-site defects are likely to be responsible for the present and similar earlier [26] discrepancies between experiment and theory.…”

contrasting

confidence: 37%

“…These values are an order of magnitude higher than that of Ni 4s, Mn 4s, and Ga 4s, p states [25]. So, the UPS valence band (VB) spectra are calculated by adding the partial DOS (PDOS) of Ni and Mn 3d , multiplied by their respective photoemission cross-sections [26]. This added DOS is multiplied with the Fermi function at the measurement temperature and convoluted with a Voigt function.…”

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confidence: 99%

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Influence of Ni doping on the electronic structure ofNi2MnGa

et al. 2005

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The modifications in the electronic structure of Ni 2+x Mn 1−x Ga by Ni doping have been studied using full potential linearized augmented plane wave method and ultra-violet photoemission spectroscopy. Ni 3d related electron states appear due to formation of Ni clusters. We show the possibility of changing the minority-spin DOS with Ni doping, while the majority-spin DOS remains almost unchanged. The total magnetic moment decreases with excess Ni. The total energy calculations corroborate the experimentally reported changes in the Curie temperature and the martensitic transition temperature with x.

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confidence: 37%

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confidence: 99%

Influence of Ni doping on the electronic structure ofNi2MnGa

et al. 2005

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“…The same calculations show that Mn spin-down 3d-states are almost entirely unoccupied. Recently these calculations have been corroborated by the data from photoemission spectroscopy [63][64][65]. Webster et al [14] showed that the magnetic moment in the Heusler alloy Ni 2 MnGa is localized primarily on the manganese atoms, µ Mn ≈ 4.17µ B , while the magnetic moment on nickel atoms µ Ni ≤ 0.3µ B .…”

Section: Superstructural Motivesmentioning

confidence: 84%

Shape memory ferromagnets

Васильев¹,

Buchelnikov²,

Takagi³

et al. 2003

Phys.-Usp.

249

135

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In ferromagnetic alloys with shape memory large reversible strains can be obtained by rearranging the martensitic domain structure by a magnetic field. Magnetization through displacement of domain walls is possible in the presence of high magnetocrystalline anisotropy, when martensitic structure rearrangement is energetically favorable compared to the reorientation of magnetic moments. In ferromagnetic Heusler alloys Ni2+xMn1−xGa the Curie temperature exceeds the martensitic transformation temperature. The fact that these two temperatures are close to room temperature offers the possibility of magnetically controlling the shape and size of ferromagnets in the martensitic state. In Ni2+xMn1−xGa single crystals, a reversible strain of ∼ 6% is obtained in fields of ∼ 1 T.

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“…Earthworms have been shown to accumulate high concentrations of heavy metals within their tissues from a variety of metal contaminated soils, mainly from anthropogenic sources [7^12]. There is evidence that an excess of heavy metals is dealt with by at least two coexisting intracellular pathways [13,14]. The ¢rst pathway involves the retention of certain metals (predominantly lead and zinc) in insoluble calcium phosphate granules, the chloragosomes [11].…”

Section: Introductionmentioning

confidence: 99%

The identification, cloning and characterization of earthworm metallothionein

1998

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Combining standard gel chromatographic techniques and novel molecular methodologies (Directed Differential Display and quantitative PCR), it has been possible to isolate and sequence two isoforms of the first true earthworm metallothionein. Both proteins are characteristically high in cysteine residues and possess no significant aromatic residues. Metal responsiveness was confirmed by determining metallothionein specific expression profiles in earthworms exposed to soils of differing heavy metal concentrations. Analysis of the derived amino acid sequence of isoform 2 identified two putative N-glycosylation signal sequences, suggesting that the two isoforms may have different subcellular distributions and functions. Possible implications for intracellular metal trafficking are discussed.

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Photoelectron spectroscopy of manganese-based Heusler alloys

Cited by 30 publications

References 37 publications

Influence of Ni doping on the electronic structure ofNi2MnGa

Influence of Ni doping on the electronic structure ofNi2MnGa

Shape memory ferromagnets

The identification, cloning and characterization of earthworm metallothionein

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