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We measure thermodynamic magnetization of a low-disordered, strongly correlated two-dimensional electron system in silicon. Pauli spin susceptibility is observed to grow critically at low electron densities - behavior that is characteristic…

Strongly Correlated Electrons · Physics 2007-05-23 S. V. Kravchenko , A. A. Shashkin , S. Anissimova , A. Venkatesan , M. R. Sakr , V. T. Dolgopolov , T. M. Klapwijk

We show that in the Anderson model for a two-dimensional non-Fermi liquid a magnetic instability can lead to the itinerant electron ferromagnetism. The critical temperature and the susceptibility of the paramagnetic phase have been…

Strongly Correlated Electrons · Physics 2009-10-31 I. Tifrea , I. Grosu , M. Crisan

We present an extensive experimental and theoretical study of surface acoustic wave-driven ferromagnetic resonance. In a first modeling approach based on the Landau-Lifshitz-Gilbert equation, we derive expressions for the magnetization…

Mesoscale and Nanoscale Physics · Physics 2015-06-05 L. Dreher , M. Weiler , M. Pernpeintner , H. Huebl , R. Gross , M. S. Brandt , S. T. B. Goennenwein

The description of the collective magnetorheological effect induced by magnetic field in magnetoactive elastomers is proposed. The condition of consistency is used between magnetic and mechanic momenta of forces exerted on magnetically…

Soft Condensed Matter · Physics 2020-05-27 V. M. Kalita , I. M. Ivanova , V. M. Loktev

Using a newly developed quantum Monte Carlo technique, we provide strong evidence for the stability of a saturated ferromagnetic phase in the high-density regime of the two-dimensional infinite-U Hubbard model. By decreasing the electron…

Strongly Correlated Electrons · Physics 2011-02-28 Giuseppe Carleo , Saverio Moroni , Federico Becca , Stefano Baroni

For forty years researchers on ferroelectric switching have used the Kay-Dunn theory to model the thickness-dependence of the coercive field; it works surprisingly well, despite the fact that it is based upon homogeneous nucleation and a…

Materials Science · Physics 2007-05-23 P. Chandra , M. Dawber , P. B. Littlewood , J. F. Scott

The phase transition to ferromagnetic order in itinerant ferromagnetic superconductor UGe$_2$ as function of pressure shows change of phase transition order. At low temperature and high pressure the transition is of first order and at…

Superconductivity · Physics 2013-12-31 Diana V. Shopova

We investigate how controlling induced eddy currents in thin film ferromagnet-normal metal (FM/NM) structures can be used to tailor the local microwave (MW) fields in ferromagnetic resonance (FMR) experiments. The MW fields produced by eddy…

Mesoscale and Nanoscale Physics · Physics 2016-05-25 Vegard Flovik , Bjørn Holst Pettersen , Erik Wahlström

It was recently observed that materials showing most striking multiferroic phenomena are frustrated spin-density-wave magnets. We present a simple phenomenological theory, which describes the orientation of the induced electric polarization…

Strongly Correlated Electrons · Physics 2009-11-11 Maxim Mostovoy

We report an interesting magnetic behavior of a Co film (thickness ~ 350 {\AA}) grown on Si/Ti/Cu buffer layer by electro-deposition (ED) technique. Using depth sensitive X-ray reflectivity and polarized neutron reflectivity (PNR) we…

Materials Science · Physics 2016-04-12 Surendra Singh , C. L. Prajapat , D. Bhattacharya , S. K. Ghosh , M. R. Gonal , S. Basu

We investigated the magnetotransport in high quality ferromagnetic (Ga,Mn)As films and wires. At low temperature the conductivity decreases with decreasing temperature without saturation down to 20 mK. Here we show, that the conductivity…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 Daniel Neumaier , Markus Schlapps , Ursula Wurstbauer , Janusz Sadowski , Matthias Reinwald , Werner Wegscheider , Dieter Weiss

We provide evidence for a finite temperature ferromagnetic transition in 2-dimensions as $H \to 0$ in thin films of $^3$He on graphite, a model system for the study of two-dimensional magnetism. We perform pulsed and CW NMR experiments at…

Condensed Matter · Physics 2009-11-07 H. M. Bozler , Yuan Gu , Jinshan Zhang , K. S. White , C. M. Gould

The apparently inimical relationship between magnetism and superconductivity has come under increasing scrutiny in a wide range of material classes, where the free energy landscape conspires to bring them in close proximity to each other.…

Strongly Correlated Electrons · Physics 2015-05-20 Sunil Nair , O. Stockert , U. Witte , M. Nicklas , R. Schedler , K. Kiefer , J. D. Thompson , A. D. Bianchi , Z. Fisk , S. Wirth , F. Steglich

Recent results in electric-field control of magnetism have paved the way for the design of alternative magnetic and spintronic devices with enhanced functionalities and low power consumption. Among the diversity of reported magnetoelectric…

The magnetic state of heavy metal Pt thin films in proximity to the ferrimagnetic insulator Y$_{3}$Fe$_{5}$O$_{12}$ has been investigated systematically by means of x-ray magnetic circular dichroism and x-ray resonant magnetic reflectivity…

The Feynman demonstration that electromagnetic field momentum is real-even for static fields-can be made more pedagogically useful by simplifying its geometry. Instead of Feynman's disk with charged balls on its surface, this article uses…

History and Philosophy of Physics · Physics 2023-10-23 Oliver Davis Johns

The ferromagnetic phase diagram of the periodic Anderson model is calculated using dynamical mean-field theory in combination with the modified perturbation theory. Concentrating on the intermediate valence regime, the phase boundaries are…

Strongly Correlated Electrons · Physics 2009-10-31 D. Meyer , W. Nolting

Based on first-principles density functional calculations, a general approach for determining and analyzing the degree of spin polarization (P) in ferromagnets is presented. The approach employs the so-called tetrahedron method to evaluate…

Materials Science · Physics 2007-05-23 M. S. Bahramy , P. Murugan , G. P. Das , Y. Kawazoe

It is shown that polycrystalline fullerene thin films on hydrogen passivated Si(111) substrates irradiated by 2 MeV protons displays ferromagnetic-like behavior at 5 K. At 300 K both the pristine and the irradiated film show diamagnetic…

Materials Science · Physics 2007-05-23 S. Mathew , B. Satpati , B. Joseph , B. N. Dev , R. Nirmala , S. K. Malik

Imaging the magnetic configuration of thin-films has been a long-standing area of research. Since a few years, the emergence of two-dimensional ferromagnetic materials calls for innovation in the field of magnetic imaging. As the magnetic…

Materials Science · Physics 2021-01-13 T. Guillet , A. Marty , C. Vergnaud , F. Bonell , M. Jamet
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