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نمایش نتایج: از شماره 31 تا 40 , از مجموع 138

موضوع: موقعیت‌های خالی در دانشگاه‌های خارج از کشور

  1. #31
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    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    Nuclear reactions with exotic beams studied with the Ge Miniball detector

    50000403v238
    Promoter: Piet Van Duppen, Mark Huyse

    details
    Description: This position is related to the FWO-project “Nuclear reactions with exotic beams studied with the Ge Miniball detector” and is open for a starting Ph.D student. Fundamental research will be conducted in low-energy nuclear physics by using intense beams of exotic nuclei. The experimental work is part of several European collaborations which make use of accelerated beams of ISOLDE, CERN (Genève, CH), GSI (Darmstadt, D), JYFL (Jyväskylä, FI) and LISOL (Louvain-la-Neuve, B). The aim is to manipulate radioactive ion beams through capturing, cooling and post-acceleration and use these prepared beams for decay- and reaction studies.

    Key words: experimental nuclear physics, exotic nuclei, nuclear structure, radioactive ion beams

    Latest application date: 2009-12-31

    Financing: available

    Type of Position: scholarship


    Research group: Department of Physics and Astronomy

    Remarks: IMPORTANT: This position is in the group of "Nuclear Spectroscopy" of the "Instituut voor Kern- en Stralingsfysica". The group consists of some 14 researchers. The experiments are performed at different large-scale facilities and require short stays (typically 2 weeks per experimental campaign).
    The candidate will also have a limited number of didactical tasks within the department of physics and astronomy.


    روزگار است، آنكه گه عزت دهد گه خوار دارد. چرخ بازيگر از اين بازيچه ها بسيار دارد. "قائم مقام فراهانی"

  2. #32
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    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    Spin-torque effects in magnetic nanostructures


    details
    Description: This position is related to our research program on spin torque effects in nanostructured magnetic materials. The spin torque effect is a recent discovery in magnetic materials and refers to the switching of the ferromagnetic magnetization by subjecting the material to a spin-polarized electric current rather than an external field. Apart from the fundamental interest in this phenomenon, this may also become an important technological tool in new generations of magnetic memory devices. Within this project we will study how magnetization reversal occurs under the influence of a spin-polarized current in ferromagnetic nanowires, ferromagnet/metal multilayer structures and magnetic nanoparticles embedded in a non-magnetic host material.
    This project will be carried out in close collaboration between the Nuclear Solid State Physics group (K. Temst) of the Institute for Nuclear and Radiation Physics and the Laboratory for Solid State Physics and Magnetism (C. Van Haesendonck, A. Volodin). The samples will be prepared in the Ion and Molecular Beam Laboratory in Leuven. We will study the spin torquee effects with magnetotransport, magnetic force microscopy, and Mössbauer effect. Additional measurements, involving synchrotron and neutron scattering will be carried out at the ESRF (Grenoble) and the Hahn-Meitner-Institut (Berlin).


    Key words: nanostructures, magnetism

    Latest application date: 2009-12-31

    Financing: available

    Type of Position: scholarship


    Research group: Department of Physics and Astronomy

    روزگار است، آنكه گه عزت دهد گه خوار دارد. چرخ بازيگر از اين بازيچه ها بسيار دارد. "قائم مقام فراهانی"

  3. #33
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    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    Lattice site location of impurities in semiconductors


    details
    Description: The exact lattice site occupied by impurities in a semiconductor host drastically determine their properties, which can be either beneficial (as an electrical, optical, magnetic… dopant) or detrimental. By studying the anisotropic emission of charged particles, following the radioactive decay of implanted impurities, it is possible to determine the position of the impurity with a very high precision (down to 0.01 nm). This knowledge can finally lead to the manipulation of occupied lattice site(s) by varying external parameters, e.g. thermal treatment, co-doping, electron irradiation etc. These emission channeling experiments are mainly performed at the ISOLDE facility at CERN (Geneva) and are compared to existing ab initio calculations. These physical observations will be coupled to the electrical properties such sheet resistance, mobility, defect distribution thus providing a complete understanding of the impurity behavior during implantation and subsequent annealing.


    Key words: nanostructures, semiconductors

    Latest application date: 2009-12-31

    Financing: available

    Type of Position: scholarship


    Research group: Department of Physics and Astronomy

    روزگار است، آنكه گه عزت دهد گه خوار دارد. چرخ بازيگر از اين بازيچه ها بسيار دارد. "قائم مقام فراهانی"

  4. #34
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    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    Nanoprecipitate formation by ion implantation


    details
    Description: The objective is to create precipitates embedded within a substrate as the interaction of the nanoclusters with the surroundings can lead to additional functionality versus clsuters which are solely deposited on a surface. An attractive approach for this purpose is to rely on high-fluence implantation of energetic ions followed by thermal treatment, such that clusters will self-assemble in the substrate. Eventually, this ion beam synthesis can be combined with the use of nm-sized masks to form either patterned groups of precipitates or even (large) ordered single precipitates. It is important to realize that the non-equilibrium conditions during ion implantation allow the formation of metastable phases, thus further expanding the possible control of the functionality. Concurrent with the fabrication, efforts towards refined characterization on the nm-scale need to be pursued. Structural information will be investigated using EXAFS, RBS, high resolution TEM and 3D-composition mapping using the Tomographic Atomprobe.


    Key words: ion beams, implantation, clusters, nanoprecipitates

    Latest application date: 2009-12-31

    Financing: available

    Type of Position: scholarship


    Research group: Department of Physics and Astronomy

    روزگار است، آنكه گه عزت دهد گه خوار دارد. چرخ بازيگر از اين بازيچه ها بسيار دارد. "قائم مقام فراهانی"

  5. #35
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    Nov 2008
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    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    Ion beam sculpting of thin film surfaces


    details
    Description: There is currently a strong interest in processes that can lead to a largely parallel production of nanoscale features on a surface. Small features can be created using ‘top-down’ lithographic methods like electron beam lithography and focused ion beam writing, but these are serial, and hence, slow and expensive production techniques. The interest is therefore focused on self-organization (‘bottom-up’) as a route towards high-throughput mass production of regularly structured surfaces. One of the successful methods explored so far is sputtering with an ion beam in order to create topographically modulated surfaces. This has been observed to lead to the formation of ripple structures and dots (at the nanometer scale) on a variety of surfaces (semiconductors, metals, and insulators). The pattern is the result of a competition between roughening as a result of the ion erosion and smoothening as a result of surface diffusion. Ion irradiation has furthermore the attractive feature that it is a technique that is already familiar to and implemented in the mass production of semiconductor devices, and therefore it may be adopted by the industry as a tool for mass production of controlled manipulation of surface morphology.


    Key words: magnetism, nanostructures, thin films

    Latest application date: 2009-12-31

    Financing: available

    Type of Position: scholarship


    Research group: Department of Physics and Astronomy

    روزگار است، آنكه گه عزت دهد گه خوار دارد. چرخ بازيگر از اين بازيچه ها بسيار دارد. "قائم مقام فراهانی"

  6. #36
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    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    Local probing of interfacial coupling in correlated electron systems


    details
    Description: This research proposal focuses on thin-film correlated electron systems in which layers with different functionalities (ferromagnet, antiferromagnet, superconductor) are confronted with each other at their mutual interface. The intimate contact between two dissimilar layers leads, in general, to a proximity effect that influences the intrinsic properties of the constituent layers. We will study interface coupling and proximity effects in three model systems that incorporate a ferromagnet on the one hand and another ferromagnet, an antiferromagnet, or a superconductor on the other hand. In all cases it is our aim to unravel the details of the coupling and/or mutual influence at the interface. One of the main tools in this work is the use of synchrotron-based nuclear resonant scattering and probing layers containing suitable Mössbauer isotopes to determine the interfacial properties.


    Key words: magnetism, superconductivity, correlated electron systems, synchrotron, Mossbauer

    Latest application date: 2009-12-31

    Financing: available

    Type of Position: scholarship


    Research group: Department of Physics and Astronomy

    روزگار است، آنكه گه عزت دهد گه خوار دارد. چرخ بازيگر از اين بازيچه ها بسيار دارد. "قائم مقام فراهانی"

  7. #37
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    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    Advanced research on exotic nuclei for nuclear physics and nuclear astrophysics

    50000403v1200
    Promoter: Piet Van Duppen, Mark Huyse

    details
    Description: This position is related to the IUAP-project “Advanced research on exotic nuclei for nuclear physics and nuclear astrophysics” and is open for a starting Ph. D student. Fundamental research will be conducted in low-energy nuclear physics by using intense beams of exotic nuclei. The experimental work is part of several European collaborations which make use of accelerated beams of ISOLDE, CERN (Genève, CH), GSI (Darmstadt, D), JYFL (Jyväskylä, FI) and LISOL (Louvain-la-Neuve, B). The aim is to manipulate radioactive ion beams through capturing, cooling and post-acceleration and use these prepared beams for decay- and reaction studies.

    Key words: experimental nuclear physics, exotic nuclei, nuclear structure, radioactive ion beams

    Latest application date: 2009-12-31

    Financing: available

    Type of Position: scholarship

    Source of Funding: IAP project

    Duration of the Project : 4 years


    Research group: Department of Physics and Astronomy

    Remarks: IMPORTANT: This position is in the group of "Nuclear Spectroscopy" of the "Instituut voor Kern- en Stralingsfysica". The group consists of some 14 researchers. The experiments are performed at different large-scale facilities and require short stays (typically 2 weeks per experimental campaign).

    More information on the application procedures and information on the CSC scholarship can be found on http://phd.kuleuven.be/set/voorstellen_csc.php

    روزگار است، آنكه گه عزت دهد گه خوار دارد. چرخ بازيگر از اين بازيچه ها بسيار دارد. "قائم مقام فراهانی"

  8. #38
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    Nov 2008
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    1,459

    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    Structural and magnetic roughness of thin films by off-specular neutron reflectivity

    50000403v1283
    Promoter: Kristiaan Temst, André Vantomme

    details
    Description: We are looking for a candidate who is interested to pursue interdisciplinary research on thin film systems, leading to a PhD. The topic concerns the study of structural and magnetic roughness of thin fil msystems. On the one hand, metallic thin films (hard condensed matter) will be studied with the aim of correlating the structural features (in particular the film roughness) with the magnetic hereogeneity ('magnetic roughness'). On the other hand, the surface morphology of thin films of soft condensed matter systems (polymer films) will be studied. The overall aim is to develop a better understanding of roughness and fractal surface behaviour of thin films. In practice the main research tool will be off-specular reflectivity of neutrons. The candidate will be stationed at the Institut Laue-Langevin (ILL) in Grenoble, where the world's most powerful neutron source is located. Neutron beam time for this project is forseen. Additional characterization measurements will be carried out in the university. The candidate will carry out her/his research work in tight collaboration with and under the supervision of the university promoter and a senior scientist at the ILL.

    Key words: thin films, nanostructures, neutron scattering

    Latest application date: 2009-12-31

    Financing: available

    Type of Position: scholarship

    Duration of the Project : 3 years


    Research group: Department of Physics and Astronomy

    روزگار است، آنكه گه عزت دهد گه خوار دارد. چرخ بازيگر از اين بازيچه ها بسيار دارد. "قائم مقام فراهانی"

  9. #39
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    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    Search for an electric dipole moment of the neutron.

    50000403v1401
    Promoter: Nathal Severijns

    details
    Description: This Ph.D. reserach project is part of a larger international collaborative effort to search for an electric dipole moment of the neutron (d_n) at the new ultracold neutron source ruction at the Paul Scherrer Institute in Switzerland (http://nedm.web.psi.ch/index.htm). A non-vanishing value at the present level of sensitivuty would be a clear indication for a new type of CP violation, larger and not related to the CP violation that is included in the Standard Model via a phase in the quark mixing matrix. This could contribute to the understanding of the large matter-antimatter asymmetry in the universe. In a first phase the collaboration aims at improving the lower limit for d_n from the present 3 x 10^-26 e cm by almost one order of magnitude. In the second phase a sensitivity at the 5 x 10^-28 e cm level is envisaged.

    Key words: ultra cold neutrons, electric dipole moment, CP violation

    Latest application date: 2009-11-30

    Financing: available

    Type of Position: scholarship

    Source of Funding: FWO - G.0375.09

    Duration of the Project : 4 years

    Research group: Department of Physics and Astronomy

    Remarks: This research project requires frequent visits and stays at the Paul Scherrer Institute (Villigen, Switzerland).

    روزگار است، آنكه گه عزت دهد گه خوار دارد. چرخ بازيگر از اين بازيچه ها بسيار دارد. "قائم مقام فراهانی"

  10. #40
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    پیش فرض پاسخ : موقعیت‌های خالی در دانشگاه‌های خارج از کشور

    Position related to the project 'Magnetic spin structures at the nanometer scale'

    50000403v1463
    Promoter: Kristiaan Temst, André Vantomme

    details
    Description: The aim is to perform fundamental research in preparation of a PhD degree in the domain of nuclear solid-state physics at the nanometer scale. In this project the influence of magnetic ordering in thin films and nanostructures on the electronic transport and the coupling between films with different magnetic properties is studied. Physical vapour deposition and ion beam techniques in the IMBL laboratory will be used for sample preparation, while magnetoresistance and hyperfine interactions will be used for the study of the magnetic properties. Additional experiments are forseen in synchrotron and neutron beam facilities (ESRF and ILL, Grenoble)

    Key words:

    Latest application date: 2009-12-31

    Financing: available

    Type of Position: scholarship or salary

    Source of Funding: K.U. Leuven FLOF or K.U. Leuven AAP

    Duration of the Project : 4 years


    Research group: Department of Physics and Astronomy

    Remarks: The candidates are expected to be Dutch speaking.

    روزگار است، آنكه گه عزت دهد گه خوار دارد. چرخ بازيگر از اين بازيچه ها بسيار دارد. "قائم مقام فراهانی"

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