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Your search keyword '"Samolyuk, G.D."' showing total 22 results
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22 results on '"Samolyuk, G.D."'

8. Electronic properties of iron arsenic high temperature superconductors revealed by angle resolved photoemission spectroscopy (ARPES)

Author

Liu, Chang, Kondo, Takeshi, Palczewski, A.D., Samolyuk, G.D., Lee, Y., Tillman, M.E., Ni, Ni, Mun, E.D., Gordon, R., Santander-Syro, A.F., Bud’ko, S.L., McChesney, J.L., Rotenberg, E., Fedorov, A.V., Valla, T., Copie, O., Tanatar, M.A., Martin, C., Harmon, B.N., Canfield, P.C., Prozorov, R., Schmalian, J., and Kaminski, A.

Published
2009
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12. Electronic structure and magnetic properties of Gd5(Si(sub 1-x)Ge(sub x))4

Author

Samolyuk, G.D. and Antropov, V.P.

Subjects
Germanium -- Magnetic properties, Gadolinium -- Magnetic properties, Silicon compounds -- Magnetic properties, Electron configuration -- Analysis, Physics
Abstract

Band structure methods are used for examining the electronic structure and magnetic properties of Gd5(Si(sub 1-x)Ge(sub x))4 system of alloys. Ferromagnetic orthorhombic (OR) structure is found to possess lower energy in comparison to the ferromagnetic monoclinic (MC) structure and the effective Heisenberg model parameters decrease with transition from OR to MC structure.

Published
2002

13. Exchange coupling in pure hcp Gd and magnetostructural transition in Gd5(Si2Ge2)

Author

Samolyuk, G.D. and Antropov, V.P.

Subjects
Magnetoresistance -- Research, Electron configuration -- Research, Gadolinium -- Optical properties, Gadolinium -- Magnetic properties, Physics
Abstract

The electronic structure and magnetic properties of Gd and Gd5(Si2Ge2) systems are studied using the band structure approach. Multiple-scattering formalism of exchange coupling calculation is implemented and Curie temperature is calculated in pure Gd.

Published
2005

15. Magneto-structural phase transition in Gd(sub 5)(Si2Ge2) ad MnFe(P1/3As2/3) systems

Author

Samolyuk, G.D. and Antropov, V.P.

Subjects
Phase transformations (Statistical physics) -- Research, Iron compounds -- Structure, Iron compounds -- Magnetic properties, Gadolinium -- Structure, Gadolinium -- Magnetic properties, Physics
Abstract

The electronic structure and magnetic properties of highly responsive materials Gd5(Si2Ge2) and MnFe(P1/3As2/3) is presented. The magnetic-structural transformation in these systems corresponds to a first order phase transition.

Published
2003

20. The effect of varying the crystal structure on the magnetism, electronic structure and thermodynamics in the Gd5(SixGe1−x)4 system near x=0.5

Author

Pecharsky, V.K., Samolyuk, G.D., Antropov, V.P., Pecharsky, A.O., and Gschneidner, K.A.

Subjects
*CRYSTALLOGRAPHY, *STOICHIOMETRY
Abstract

The crystal structure, magnetic and other physical properties of the intermetallic Gd5(SixGe1−x)4 phases are strongly dependent on the Si:Ge ratio (x). Especially intriguing behavior is observed when the chemical composition in this system is near x≅0.5, where small changes in the stoichiometry result in drastic variations in the chemical bonding, electronic structure, crystal structure, and magnetism. Furthermore, the fully reversible magnetic/crystallographic (TC≅270 K) and the irreversible thermoelastic crystallographic (between ∼500 and ∼750 K) transformations exist near this critical chemical composition. Both of these transformations involve the same two crystallographic modifications: the monoclinic Gd5(Si2Ge2)-type (β) and the orthorhombic Gd5Si4-type structures (α and γ). First principle calculations of the electronic structure and exchange coupling of these materials are in nearly quantitative agreement with the experiment. It appears that the unusual behavior observed in the near critical Gd5(SixGe1−x)4 phases is closely related to the stability of the well-defined sub-nanometer thick atomic slabs coupled with the flexibility of their arrangements. [Copyright &y& Elsevier]

Published
2003
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