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Monday, July 27, 2020 | History

3 edition of Band structure and Fermi surface of ferromagnetic nickel found in the catalog.

Band structure and Fermi surface of ferromagnetic nickel

Eric I. Zornberg

Band structure and Fermi surface of ferromagnetic nickel

by Eric I. Zornberg

  • 210 Want to read
  • 36 Currently reading

Published .
Written in English


Classifications
LC ClassificationsMicrofilm 29432
The Physical Object
FormatMicroform
Paginationp. 244-263
Number of Pages263
ID Numbers
Open LibraryOL1368715M
LC Control Number92896015

Since it is not ferromagnetic it was felt to be simpler than nickel, including the role of the specific character of the band structure (Fermi surface multiplicity reduces the calculated mass enhancement) and the opposition provided by spin coupling effects to the establishment of superconductivity. The Fermi surface and cyclotron masses of the ErGa 3 compound are studied by means of the de Haas–van Alphen technique under pressure. Concurrently, the electronic structure is calculated ab initio for the ferromagnetic phase of ErGa 3.

  Measurements of the high‐field galvanomagnetic properties of nickel show that one electron‐sheet of its Fermi surface is multiply connected, and touches the {} faces of the Brillouin zone as does the Fermi surface of copper. In magnetic fields up to 80 kOe applied in a nonsymmetry direction, the magnetoresistance saturates and the transverse voltage is linear, . This indicates that the Ni magnetic moment decreases in the interface. Spin-polarized band structure calculations from bulk nickel identify the observed minority and majority bands. The experimental Fermi surface maps show that h-BN distorts a minority d-band in a way which is consistent with the decreasing magnetic moment.

Furthermore, the physical properties of graphene are significantly altered. Main differences are the opening of a band gap in the electronic structure and a shifting of the π-band by ∼2 eV below the Fermi-level. Experimental evidence suggests that the ferromagnetic nickel induces a magnetic moment in the carbon.   Ferromagnetic Nickel is the most celebrated iron group metal with pronounced discrepancies between the experimental electronic properties and predictions of density functional theories. In this work, we show in detail that the recently developed multi-band Gutzwiller theory provides a very good description of the quasi-particle band structure of nickel. We obtain the .


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Band structure and Fermi surface of ferromagnetic nickel by Eric I. Zornberg Download PDF EPUB FB2

6 Fermi surface contours for minority spin electrons. 7 Fermi surface contours for majority spin electrons. 8 Density of states for nickel obtained from experiment. 9 Experimentally observed angular variation of the extremal cross-sectional areas of-2 the Fermi surface (for area. The band structure and Fermi surface of ferromagnetic nickel obtained by Hodges, Gold, and Stone is reexamined in the light of recent data of Stark on the large Γ-centered Fermi surface.

The band structure and Fermi surface of ferromagnetic Ni were studied using Mueller's combined interpolation scheme, extended to include spin-orbit and exchange interactions. Uniform exchange splittings were included in the molecular-field approximation. Semiempirical band structure were obtained which gave detailed agreement with Cited by:   Band structure of ferromagnetic metal Thread starter Kit; Start date ; the effect of the spin splitting on the position of the fermi surface is negligible[4].

However, depending on the temperature (and in the case of a para/dia-magnet, also the applied field) the spin splitting can result in a significant polarization of the.

The band structure and Fermi surface of ferromagnetic nickel obtained by Hodges, Gold, and Stone is reexamined in the light of recent data of Stark on the large Γ-centered Fermi surface sp↑ and sp↓ sheets. The energy band structure, calculated by Hodges, Gold, and Stone using an interpolation scheme, fails to give good agreement with Stark's by: 4.

IN view of the current Interest2, ~ in the band structure and Fermi surface of ferromagnets, particularly nickel, it Is worth emphasizing the Ferromagnetic Kerr Effect (FKE) as a potentially important source of experimental Information about low frequency optical Interband transitions involving the d and s bands near the Fermi surface.

Abstract. Magneto-optical properties can be used to investigate the band structures and Fermi surfaces of ferromagnetic metals. This will be illustrated by the results of theoretical and experimental studies of nickel and iron. itinerant behavior and contributed to the Fermi surface.

A detailed comparison of itinerant versus -spin models can be found in Herring's book.^ Some of the more important calculation on the band structure of nickel used the LCAO (tight binding) method,^ ^ the APW (Augmented Plane Wave) method,^.

The evolution of the electronic band structure of the simple ferromagnets Fe, Co, and Ni during their well-known ferromagnetic-paramagnetic phase transition has been under debate for decades, with no clear and even contradicting experimental observations so far.

Using time- and spin-resolved photoelectron spectroscopy, we can make a movie on how the electronic. In FeSn, for example, the kagome-derived 2D Dirac band structure has been observed by ARPES, as well as a dispersionless band below the Fermi level, whose relationship with the observed Dirac.

The band structure of the free electron like s electrons in ferromagnetic materials is not spin polarized; however, they have the highest mobility and would be expected to be responsible for carrying the majority of the current. However, the 3d electrons have the greatest density of states at the Fermi surface and their band structure is spin.

Electronic structure of ferromagnetic iron: Fermi surface. Band Structure and Fermi Surface of Ferromagnetic Nickel. Zornberg.

Physical Review B, (1) Magnetic Compton profiles of iron and nickel. Kubo Y, Asano S. Phys Rev B Condens Matter, 42(7), 01 Sep Giant magnetoresistance (GMR) is a quantum mechanical magnetoresistance effect observed in multilayers composed of alternating ferromagnetic and non-magnetic conductive layers.

The Nobel Prize in Physics was awarded to Albert Fert and Peter Grünberg for the discovery of GMR. The effect is observed as a significant change in the electrical resistance depending on. Band structure and Fermi surface of ferromagnetic nickel. By E. Zornberg. Abstract.

Ferromagnetic Ni band structure and Fermi surface including spin-orbit and exchange interactions obtained by Mueller interpolation schem Topics: PHYSICS, SOLID-STATE. Electrical resistivity of ferromagnetic nickel and iron based alloys A Fert and I A Campbell (k.u is the extra-energy distribution for a spherical Fermi surface and a scattering probability depending only on the scattering angle.) One obtains: the band structure and on the s-d hybridization the difference of effective mass.

Conference: Electronic Structure of Magnetic 3D Metals: Ground State, Fermi Surface and Photoemission Properties. Manipulating physical properties using the spin degree of freedom constitutes a major part of modern condensed matter physics and is a key aspect for spintronics devices.

Using the newly discovered two-dimensional van der Waals ferromagnetic CrI3 as a prototype material, we theoretically demonstrated a giant magneto band-structure (GMB) effect whereby a change. The results of band structure calculations for HCP Co in ferromagnetic and paramagnetic phases are presented together with a self-consistent FCC Co band structure.

These calculations were performed by means of a linearised KKR method (model Hamiltonian) for lattice constants appropriate to atmospheric pressure and kbar. Mathon's 92 research works with 3, citations and 2, reads, including: Effect of Hybridization on Exchange Coupling in Magnetic Multilayers.

A decade ago Rhie et al ( Phys. Rev. Lett ) reported that when ferromagnetic nickel is subject to an intense ultrashort laser pulse, its exchange splitting is reduced quickly. But to simulate such reduction remains a big challenge.

The popular rigid band approximation (RBA), where both the band structure and the exchange splitting are held. RESULTS. In this work, we therefore investigate the experimental fingerprint of such a coherent spin transfer process in an Fe 50 Ni 50 alloy.

We show that the Fe 50 Ni 50 alloy has a band structure and density of states that enable efficient light-driven coherent spin transfer from the Ni to the Fe magnetic subsystem (see Fig.

1, A and B), i.e., it enables the observation of the .Hall effect of nickel in strong magnetic fields[9 J and of the magnetooptic parameters of ferromagnetic metalsr, a real opportunity of constructing the Fermi surfaces arose.

Thus, several sufficiently satisfactory variants of the Fermi surface of nickel, which are quite close to one another, have by now been.The nature of the nematicity in iron pnictides is studied with a proposed magnetic fluctuation.

The spin-driven order in the iron-based superconductor has been realized in two categories: stripe SDW state and nematic state.

The stripe SDW order opens a gap in the band structure and causes a deformed Fermi surface. The nematic order does not make any gap in the band structure .