Sort by: Order: Results:

Now showing items 917-936 of 1870

  • M?_ssbauer spectrometry of A2FeMoO6 (A =Ca, Sr, Ba): Search for antiphase domains 

    VENKATESAN, MUNUSWAMY; COEY, JOHN MICHAEL DAVID (American Physical Society, 2001)
    M?_ssbauer spectrometry was carried out in the range of temperature from 4 K to well above the Curie temperature on polycrystalline ceramics of A2FeMoO6 (A=Ca,Sr,Ba). A secondary component in all the paramagnetic or ...
  • Machine learning density functional theory for the Hubbard model 

    Sanvito, Stefano; Nelson, James; Tiwari, Rajarshi (2019)
    The solution of complex many-body lattice models can often be found by defining an energy functional of the relevant density of the problem. For instance, in the case of the Hubbard model the spin-resolved site occupation is ...
  • Machine Learning for Condensed Matter Physics 

    Nelson, James Patrick (Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
    This thesis is about the application of machine learning (ML) methods to a variety of problems in condensed matter physics. As condensed matter physics has large computational and experimental datasets readily available - ...
  • Magnesium, nitrogen codoped Cr2O3: A p-type transparent conducting oxide 

    FLEISCHER, KARSTEN; ARCA, ELISABETTA; SHVETS, IGOR (2011)
    A p-type transparent conductive oxide (TCO) was synthesised by codoping of poorly conducting chromium oxide (Cr2O3) with magnesium and nitrogen. We demonstrated that the codoping produced a TCO with good figure of merit ...
  • Magnetic activity and hot Jupiters of young Suns: the weak-line T Tauri stars V819 Tau and V830 Tau 

    VIDOTTO, ALINE (2015)
    We report results of a spectropolarimetric and photometric monitoring of the weak-line T Tauri stars (wTTSs) V819 Tau and V830 Tau within the MaTYSSE programme, involving the ESPaDOnS spectropolarimeter at the Canada-France-Hawaii ...
  • Magnetic and Electronic Phenomena in Oxide Interfaces, Thin Films and Heterostructures 

    Porter, Stephen
    The miniaturisation and reduction of power consumption in modern integrated circuitry and active compo- nents such as sensors and memory demands the development of novel materials. These materials must not only have ...
  • Magnetic and electronic properties of D022-Mn3Ge (001) films 

    RODE, KARSTEN; SANVITO, STEFANO; COEY, JOHN; STAMENOV, PLAMEN; VENKATESAN, MUNUSWAMY (2012)
    Oriented thin films of Mn3Ge with the tetragonal D022structure,grown on strontium titanate substrates, exhibit a low magnetization M s?=?73?kA m?1 combined with high uniaxial anisotropyK u?=?0.91?MJ m?3 at 300?K, making ...
  • The magnetic and magnetoresistance properties of ultrathin magnetite films grown on MgO substrate 

    SHVETS, IGOR; MCEVOY, CIARAN; RAMOS, RAFAEL (AMERICAN INSTITUTE OF PHYSICS, 2006)
    We report on the properties of ultrathin (2, 4, 6, and 8?nm) epitaxial films of magnetite, Fe3O4, grown on MgO (100). Atomic force microscopy image and V-I curves suggest that the films at this thickness are still continuous. ...
  • Magnetic and transport properties of epitaxial stepped Fe3O4(100) thin films 

    SHVETS, IGOR (2014)
    We investigate the magnetic and transport properties of epitaxial stepped Fe3O4 thin films grown with different thicknesses. Magnetization measurements suggest that the steps induce additional anisotropy, which has an easy ...
  • Magnetic and transport properties of magnetite based nanostructures 

    Wu, Han-Chun (Trinity College (Dublin, Ireland). School of Physics, 2009)
    In this thesis, we investigate the magnetic and transport properties of magnetite based nanostructures. We in particular investigate the magnetization and surface Verwey transition of magnetite thin film, interlayer ...
  • Magnetic barcodes in molecular medicine 

    Byrne, Fiona N. (Trinity College (Dublin, Ireland). School of Physics, 2010)
    The need for faster and more sensitive diagnostic systems for the early detection of many life-threatening diseases is the driving force behind the work in this thesis. A lab-on-a-chip prototype device incorporating a ...
  • Magnetic Characteristics of Sunspot Groups and their Role in Producing Adverse Space Weather 

    MCCLOSKEY, AOIFE ELIZABETH (Trinity College Dublin. School of Physics. Discipline of Physics, 2019)
    The energy that powers solar flares is known to come from magnetic energy stored in sunspot groups, but the precise conditions required and processes involved in energy release remain unclear. The likelihood of ...
  • Magnetic coupling in Co Cr2 O4 and Mn Cr2 O4: An LSDA+U study 

    EDERER, CLAUDE (American Physical Society, 2007)
    We present a first principles LSDA+U study of the magnetic coupling constants in the spinel magnets CoCr2O4 and MnCr2O4. Our calculated coupling constants highlight the possible importance of AA interactions in spinel ...
  • Magnetic excitations in a nanocontact 

    COEY, JOHN MICHAEL DAVID (American Physical Society, 2001)
    The domain wall in a ferromagnetic nanocontact adopts a specific configuration?Neel-like, vortex, or Bloch-like?depending on the dipole-dipole interactions governed by the size and shape of the contact and its atomic ...
  • Magnetic field effects on electrodeposition and the properties of electrodeposited nickel and nickel-copper 

    O'Reilly, Cora (Trinity College (Dublin, Ireland). School of Physics, 2004)
    The association of magnetism and electrodeposition is studied from two separate perspectives. Firstly the effect of an applied magnetic field on the deposition process and secondly the production of magnetic materials by ...
  • Magnetic field effects on the electrodeposition and electrodissolution of copper 

    Hinds, Gareth (Trinity College (Dublin, Ireland). School of Physics, 2001)
    The effect of a static magnetic field on the electrodeposition and electrodissolution of copper in acidified copper sulphate solution was investigated. The primary effect of the field was to increase the rate of mass ...
  • Magnetic field effects on the rest potential of ferromagnetic electrodes 

    COEY, JOHN MICHAEL DAVID (IEEE, 2002)
    The application of a magnetic field unexpectedly alters the rest potential of ferromagnetic electrodes in paramagnetic solutions of their salts. Anodic shifts of up to 60 mV in a field of 1 tesla were observed for 1Miron ...
  • Magnetic fields on young, moderately rotating Sun-like stars II. EK Draconis (HD 129333) 

    VIDOTTO, ALINE (2017)
    The magnetic fields, activity and dynamos of young solar-type stars can be empirically studied using time-series of spectropolarimetric observations and tomographic imaging techniques such as Doppler imaging and Zeeman ...
  • Magnetic hardening of Sm2Fe17N3 by radiation damage 

    COEY, JOHN MICHAEL DAVID (American Physical Society, 1998)
    Pinning type coercivity has been induced in large (?50?m) particles of Sm2Fe17N3 by irradiation with 5 GeV Pb56+ ions. Mossbauer spectroscopy is used to analyze the structure of the defects and estimate their volume. ...
  • Magnetic interaction of Co ions near the {10\bar{1}0} ZnO surface 

    SANVITO, STEFANO; ARCHER, THOMAS (2010)
    Co-doped ZnO is the prototypical dilute magnetic oxide showing many of the characteristics of ferromagnetism. The microscopic origin of the long range order however remains elusive, since the conventional mechanisms for ...