Sökning: "Biplab Sanyal"

Visar resultat 11 - 15 av 19 avhandlingar innehållade orden Biplab Sanyal.

  1. 11. Interactions and phase stability in Ni-rich binary alloys

    Författare :Shuang He; Andrei Ruban; Biplab Sanyal; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ni-based superalloys; ab initio calculations; atomic ordering; effective interactions.; Teknisk materialvetenskap; Materials Science and Engineering; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : Ni-based superalloys are the important materials for gas turbines in advancedaeroplane engines . The addition of refractory elements to these superalloys,such as rhenium and tungsten, can significantly improve the hightemperatureperformance by so-called solid-solution hardening. LÄS MER

  3. 12. A Computational Venture into the Realm of Laminated Borides and their 2D Derivatives

    Författare :Pernilla Helmer; Johanna Rosén; Martin Dahlqvist; Jonas Björk; Biplab Sanyal; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Daily life in modern society is highly dependent on many different materials and techniques for manipulating them, and the technological forefront is constantly pushed further by new discoveries. Hence, materials science is a very important field of research. LÄS MER

  4. 13. Density Functional Theory Applied to Materials for Spintronics

    Författare :Diana Mihaela Iusan; Olle Eriksson; Biplab Sanyal; Hiroshi Katayama-Yoshida; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; spintronics; dilute magnetic semiconductors; density functional theory; exchange interactions; magnetic percolation; ordering temperature; disorder; electronic structure; Physics; Fysik; Materialvetenskap; Materials Science;

    Sammanfattning : The properties of dilute magnetic semiconductors have been studied by combined ab initio, Monte Carlo, and experimental techniques. This class of materials could be very important for future spintronic devices, that offer enriched functionality by making use of both the spin and the charge of the electrons. LÄS MER

  5. 14. Ab initio Studies on Exchange Interactions in Metals and Correlated Oxides

    Författare :Adam Jakobsson; Biplab Sanyal; Marjana Lezaic; Nicola Spaldin; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : A report is given on the implementation of a frozen magnon technique in the FLAPW code FLEUR, showing that the procedure reduced computational costs compared with a previously implemented method, while delivering accurate results. Furthermore a generalisation was made of the well known one lattice formula that connects the total energy differences of spin-spirals to the adiabatic magnon excitation energies to multiple lattice systems. LÄS MER

  7. 15. New Materials for Spintronics : Electronic structure and magnetism

    Författare :Ronny Knut; Olof Karis; Biplab Sanyal; Hermann Durr; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Spintronics; X-ray photoemission; XPS; XMCD; XAS; magnetic semiconductors; HIKE; HAXPES; multilayer; monte carlo; magnetism; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : Materials exhibiting new functionalities due to interdependent electric (e.g. conductivity) and magnetic properties are potentially interesting for spintronics applications. LÄS MER