Browsing Physics (Scholarly Publications) by Title
Now showing items 839-858 of 1664
-
M?_ssbauer spectrometry of A2FeMoO6 (A =Ca, Sr, Ba): Search for antiphase domains
(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
(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 approach for quantified resolvability enhancement of low-dose STEM data
(2023)High-resolution electron microscopy is achievable only when a high electron dose is employed, a practice that may cause damage to the specimen and, in general, affects the observation. This drawback sets some limitations ... -
Machine-learning semilocal density functional theory for many-body lattice models at zero and finite temperature
(2021)We introduce a machine-learning density-functional-theory formalism for the spinless Hubbard model in one dimension at both zero and finite temperature. In the zero-temperature case this establishes a one-to-one ... -
Magnesium, nitrogen codoped Cr2O3: A p-type transparent conducting oxide
(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
(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
(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
(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
(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 control over the fractal dimension of supramolecular rod networks
(2021)Controlling supramolecular polymerization is of fundamental importance to create advanced materials and devices. Here we show that the thermodynamic equilibrium of Gd3+-bearing supramolecular rod networks is shifted ... -
Magnetic coupling in Co Cr2 O4 and Mn Cr2 O4: An LSDA+U study
(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
(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
(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)
(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 Forces in Paramagnetic Fluids
(2022)An overview of the effect of a magnetic field gradient on fluids with linear magnetic susceptibilities is given. It is shown that two commonly encountered expressions, the magnetic field gradient force and the concentration ... -
Magnetic hardening of Sm2Fe17N3 by radiation damage
(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
(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
(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
(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
(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 ...
