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  • 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 ...
  • 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 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 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 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 ...
  • Magnetic localization in mixed-valence manganites 

    COEY, JOHN MICHAEL DAVID (American Physical Society, 1997)
    The metal-insulator transition is mixed-valence manganites of the (La0.7Ca0.3)MnO3 type is ascribed to a modification of the spin-dependent potential JHs?S associated with the onset of magnetic order at TC. Here JH is the ...
  • Magnetic Modes in Rare Earth Perovskites: A Magnetic-Field-Dependent Inelastic Light Scattering study 

    COEY, JOHN (2016)
    Here, we report the presence of defect-related states with magnetic degrees of freedom in crystals of LaAlO3 and several other rare-earth based perovskite oxides using inelastic light scattering (Raman spectroscopy) at low ...
  • Magnetic moment investigations of epitaxial magnetite thin films 

    ARORA, SUNIL KUMAR; SHVETS, IGOR (AMERICAN INSTITUTE OF PHYSICS, 2008)
    In this report, we provide an x-ray magnetic circular dichroism (XMCD) study for 100?nm thick epitaxial magnetite (Fe3O4) films on MgO (001) and Al2O3 (0001) substrates. For XMCD, we recorded the surface sensitive total ...
  • Magnetic noise in MgO-based magnetic tunnel junction rings 

    COEY, JOHN; FENG, JIA-FENG; DIAO, ZHU (2010)
    Magnetization switching is investigated in ring-shaped MgO-based magnetic tunnel junctions with 168% tunneling magnetoresistance. Besides the forward and reverse onion states, two vortex states and several metastable ...
  • Magnetic noise in structured hard magnets 

    COEY, JOHN; DIAO, ZHU (2010)
    The anomalous Hall effect of wires patterned from ?Co90Fe10=Pt?n multilayers, with 10 n 50, is used to determine the magnetization process in a small volume of maze domains. Time-independent 1=f noise appears in ...
  • Magnetic noise in structured hard magnets 

    COEY, JOHN MICHAEL DAVID; DIAO, ZHU (2010)
    The anomalous Hall effect of wires patterned from ?Co90Fe10=Pt?n multilayers, with 10 n 50, is used to determine the magnetization process in a small volume of maze domains. Time-independent 1=f noise appears in ...
  • Magnetic Properties of Exchange-Biased [Co/Pt](n) Multilayer With Perpendicular Magnetic Anisotropy 

    COEY, JOHN; FENG, JIA-FENG; DIAO, ZHU (2010)
    Perpendicular exchange-biased [Co/Pt](3)/Co(t(Co))/IrMn and IrMn/Co(t(Co))/Pt/[Co/Pt](3) multilayers have been fabricated, changing the thickness (t(Co)) of the cobalt that is next to the IrMn layer. The crystal structure, ...
  • Magnetic properties of iron-rich Fe-Sc glasses 

    COEY, JOHN MICHAEL DAVID (American Physical Society, 1989)
    Amorphous FexSc100-x alloys with x=89, 90, and 91, prepared by melt spinning, exhibit a single sharp spin-freezing transition at 100 3 K to an asperomagnetic state. The average Fe57 hyperfine field at 4.2 K is 22.7 T. ...