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The domain configuration of 50 nm thick La0.7SrMnO3 films has been directly investigated using scanning electron microscopy with polarization analysis (SEMPA), with magnetic contrast obtained without the requirement for prior surface…

Materials Science · Physics 2015-06-15 Robert M. Reeve , Christian Mix , Markus König , Michael Foerster , Gerhard Jakob , Mathias Kläui

The disordered random-anisotropy magnetic nanoparticle systems with competing dipolar interactions and ferromagnetic exchange couplings are investigated by Monte Carlo simulations. Superspin glass (SSG) and superferromagnetic (SFM)…

Disordered Systems and Neural Networks · Physics 2015-05-27 Zhongquan Mao , Xi Chen

The features of electronic structure of La0.7Sr0.3MnO3, Pr0.8Sr0.2MnO3, and Pr0.6Sr0.4MnO3 polycrystalline films of different thickness have been investigated using magnetic circular dichroism (MCD) in the range of 1.1-4.2 eV. The…

Strongly Correlated Electrons · Physics 2018-12-24 Yu. E. Samoshkina , I. S. Edelman , M. V. Rautskii , M. S. Molokeev

We investigated the nature of the magnetic phase transition in the Ge/1-x-y/Sn/x/Mn/y/Te mixed crystals with chemical composition changing in the range of 0.083 < x < 0.142 and 0.012 < y < 0.119. The DC magnetization measurements performed…

Materials Science · Physics 2012-03-15 L. Kilanski , R. Szymczak , W. Dobrowolski , K. Szałowski , V. E. Slynko , E. I. Slynko

Magnetic anisotropy is a crucial characteristic for enhancing spintronic device performance. The synthesis of SmCrGe$_3$ single crystals through a high-temperature solution method has led to the determination of uniaxial magnetocrystalline…

The influence of uncorrelated (nonmagnetic) overlayers on the magnetic properties of thin itinerant-electron films is investigated within the single-band Hubbard model. The Coulomb correlation between the electrons in the ferromagnetic…

Strongly Correlated Electrons · Physics 2009-10-31 J. H. Wu , T. Herrmann , W. Nolting

Magnetic properties of polycrystalline Sm0.1Ca0.84Sr0.06MnO3 in pristine and metastable states have been investigated in wide range of temperatures and magnetic fields. It was found that below Curie temperature TC = 105 K the pristine state…

Strongly Correlated Electrons · Physics 2007-05-23 V. Markovich , I. Fita , R. Puzniak , C. Martin , K. Kikoin , A. Wisniewski , S. Hebert , A. Maignan , G. Gorodetsky

Magnetic and electric properties of a single crystal of La0.7Ca0.3CoO3 have been experimentally studied. The system attains a ferromagnetic spontaneous moment below 170 K and exhibits a re-entrant spin-glass phase below 100 K. In the…

Materials Science · Physics 2007-05-23 Asish K. Kundu , P. Nordblad , C. N. R. Rao

A magnetite (Fe3O4) single crystal (111) surface has been studied at various oxygen-iron surface stoichiometries. The stoichiometry was modified by controlling the in-situ sample anneal conditions. We have found the conditions that lead to…

Soft Condensed Matter · Physics 2007-05-23 N. Berdunov , S. Murphy , G. Mariotto , I. V. Shvets

A closer look at the temperature (T) dependence of magnetoresistance (MR) of two polycrystalline magnetic compounds, LaMn$_2$Ge$_2$ and SmMn$_2$Ge$_2$, previously reported by us, is made. A common feature for both these compounds is that…

Strongly Correlated Electrons · Physics 2007-05-23 E. V. Sampathkumaran , R. Mallik , P. L. Paulose , Subham Majumdar

We measured the chemical and magnetic depth profiles of a single crystalline (La$_{1-x}$Pr$_x$)$_{1-y}$Ca$_y$MnO$_{3-{\delta}}$ (x = 0.52\pm0.05, y = 0.23\pm0.04, {\delta} = 0.14\pm0.10) film grown on a NdGaO3 substrate using x-ray…

Materials Science · Physics 2014-11-18 Surendra Singh , M. R. Fitzsimmons , T. Lookman , J. D. Thompson , H. Jeen , A. Biswas , M. A. Roldan , M. Varela

This work presents a magnetic field imaging method based on color centers in diamond crystal applied to a thin film of a nanolaminated Mn$_2$GaC MAX phase. Magnetic properties of the surface related structures have been described around the…

Applied Physics · Physics 2020-11-13 Andris Berzins , Janis Smits , Andrejs Petruhins , Hugo Grube

We present a detailed study of the magnetic properties of low-temperature-molecular-beam-epitaxy grown Ge:Mn dilute magnetic semiconductor films. We find strong indications for a frozen state of Ge_{1-x}Mn_{x}, with freezing temperatures of…

Materials Science · Physics 2007-05-23 C. Jaeger , C. Bihler , T. Vallaitis , S. T. B. Goennenwein , M. Opel , R. Gross , M. S. Brandt

Silver films were deposited at room temperature onto H-passivated Si(111) surfaces. Their electronic properties have been analyzed by angle-resolved photoelectron spectroscopy. Submonolayer films were semiconducting and the onset of…

Materials Science · Physics 2009-11-07 A. Arranz , J. F. Sanchez-Royo , J. Avila , V. Perez-Dieste , P. Dumas , M. C. Asensio

We have investigated the magnetism of the bare and graphene-covered (111) surface of a Ni single crystal employing three different magnetic imaging techniques and ab initio calculations, covering length scales from the nanometer regime up…

The electronic properties of the surface of $\beta$-FeSi$_2$ have been debated for a long while. We studied the surface states of $\beta$-FeSi$_2$ films grown on Si(001) substrates using scanning tunnelling microscopy (STM) and spectroscopy…

Materials Science · Physics 2023-02-16 Keisuke Sagisaka , Tomoko Kusawake , David Bowler , Shinya Ohno

We report the single crystal growth and characterization of EuIn$_2$, a magnetic topological semimetal candidate according to our density functional theory (DFT) calculations. We present results from electrical resistance, magnetization,…

The atomic interaction and magnetic properties of ultrathin Fe films grown on cleaved and polished MgO(100) surfaces were studied by conversion electron M\"{o}ssbauer spectroscopy (CEMS) in broad temperature range. Fe with different layer…

Materials Science · Physics 2011-09-23 I. Dézsi , Cs. Fetzer , F. Tanczikó , A. Nakanishi , T. Kobayashi

The effect of improved dielectric properties in the presence of an applied magnetic field is discussed in Pr doped polycrystalline Gd$_{0.55}$Pr$_{0.45}$MnO$_3$ complemented by the structural properties down to 50 K and magnetic properties.…

Strongly Correlated Electrons · Physics 2023-04-05 Pooja Pant , Harshit Agarwal , Suresh Bharadwaj , Archana Sagdeo , M. A. Shaz

We investigate the magnetic and magneto-optic properties of epitaxial GaN:Gd layers as a function of the external magnetic field and temperature. An unprecedented magnetic moment is observed in this diluted magnetic semiconductor. The…

Materials Science · Physics 2009-11-10 S. Dhar , O. Brandt , M. Ramsteiner , V. F. Sapega , K. H. Ploog