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Magneto-capacitance effect was investigated using the impedance spectroscopy on single crystals of LuFe2O4. The intrinsic impedance response could be separated from the interfacial response and showed a clear hysteresis loop below TFerri ~…

Magnetism at the nanoscale has been a very active research area in the past decades, because of its novel fundamental physics and exciting potential applications. We have recently performed an {\it ab intio} study of the structural,…

Mesoscale and Nanoscale Physics · Physics 2015-05-27 J. C. Tung , G. Y. Guo

Composite materials consisting of coupled magnetic and ferroelectric layers hold the promise for new emergent properties such as controlling magnetism with electric fields. Obviously, the interfacial coupling mechanism plays a crucial role…

In this work, we present a detailed theoretical investigation of the electronic and magnetic properties of ferromagnetic slabs and clusters deposited on SrTiO$\_3$ via first-principles, with a particular emphasis on the magneto-crystalline…

Materials Science · Physics 2016-04-13 Alexander Smogunov , Cyrille Barreteau , Dongzhe Li

In this article the mechanism of the linear magnetoelectric (ME) effect in the rhombohedral multiferroic BiFeO$_3$ is considered. The study is based on the symmetry approach of the GinzburgLandau type, in which polarization,…

Materials Science · Physics 2016-04-06 A. F. Popkov , M. D. Davydova , K. A. Zvezdin , S. V. Solov'yov , A. K. Zvezdin

We studied the dynamics of magnetization through an investigation of the magnetoimpedance effect in CoFeB/(Ta, Ag, Cu) multilayered thin films grown by magnetron sputtering. Impedance measurements were analyzed in terms of the mechanisms…

Materials Science · Physics 2015-05-28 M. S. Marques , T. Mori , L. F. Schelp , C. Chesman , F. Bohn , M. A. Correa

We present a detailed study of the ground-state magnetic structure of ultrathin Fe films on the surface of fcc Ir(001). We use the spin-cluster expansion technique in combination with the relativistic disordered local moment scheme to…

Mesoscale and Nanoscale Physics · Physics 2015-05-30 A. Deák , L. Szunyogh , B. Ujfalussy

We studied the ferroelectric and ferromagnetic properties of compressive strained and unstrained BiMnO3 thin films grown by rf-magnetron sputtering. BiMnO3 samples exhibit a 2D cube-on-cube growth mode and a pseudo-cubic struc-ture up to a…

Materials Science · Physics 2013-06-06 G. M. De Luca , D. Preziosi , F. Chiarella , R. Di Capua , S. Gariglio , S. Lettieri , M. Salluzzo

Gallium arsenide (GaAs) is the widest used second generation semiconductor with a direct band gap and increasingly used as nanofilms. However, the magnetic properties of GaAs nanofilms have never been studied. Here we find by comprehensive…

Computational Physics · Physics 2017-12-05 Huan Lu , Jin Yu , Wanlin Guo

We study the symmetry of the coupling between surface acoustic waves and ferromagnetic resonance in a thin magnetic film of CoFeB deposited on top of a piezoelectric Z-cut LiNbO3 substrate. We vary the orientation of the applied magnetic…

Materials Science · Physics 2026-03-24 Florian Millo , Rafael Lopes Seeger , Claude Chappert , Aurélie Solignac , Thibaut Devolder

Very high magnetic anisotropies have been theoretically predicted for strained Fe-Co(-X) and indeed several experiments on epitaxial thin films seemed to confirm strain induced anisotropy enhancement. This study presents a critical analysis…

The rf sputtered copper ferrite films contain nanocrystalline grains. In these films, the magnetization does not saturate even in high magnetic fields. This phenomenon of high field susceptibility is attributed to the defects and/or…

Strongly Correlated Electrons · Physics 2010-10-12 P. D. Kulkarni , R. P. R. C. Aiyar , Shiva Prasad , N. Venkataramani , R. Krishnan , Wenjie Pang , Ayon Guha , R. C. Woodward , R. L. Stamps

The nature of low-impurity ferromagnetism remains a challenging problem in the solid-state community due to the strong dependence of magnetic properties on composition, concentration, and structural geometry of diluted alloys. To address…

The prediction of ferromagnetism at room temperature in Co-ZnO thin films has generated a large interest in the community due to the possible applications. However, the results are controversial, going from ferromagnetism to…

Materials Science · Physics 2009-11-11 A. Fouchet , W. Prellier , B. Mercey

Multilayer films of ZnO with Co were deposited on glass substrates then annealed in a vacuum. The magnetisation of the films increased with annealing but not the magnitude of the magneto-optical signals. The dielectric functions for the…

When a polarized light beam is incident upon the surface of a magnetic material, the reflected light undergoes a polarization rotation. This magneto-optical Kerr effect (MOKE) has been intensively studied in a variety of ferro- and…

Dimensional effects in the critical properties of multilayer Heisenberg films have been numerically studied by Monte Carlo methods. The effect of anisotropy created by the crystal field of a substrate has been taken into account for films…

Statistical Mechanics · Physics 2015-11-18 Pavel V. Prudnikov , Vladimir V. Prudnikov , Maria A. Medvedeva

The work is devoted to the investigation of the surface plasmon polaritons in the metal - dielectric heterostructures containing materials with magnetoelectric properties. The analysis of various possible configurations shows that the…

Magnetometry, x-ray, and neutron scattering have been used to study the structural and magnetic properties of a TbMnO3 thin film grown on a [001] SrTiO3 substrate by pulsed laser deposition. Although bulk TbMnO3 is a low temperature…

Materials Science · Physics 2009-11-13 B. J. Kirby , D. Kan , A. Luykx , M. Murakami , D. Kundaliya , I. Takeuchi

We have investigated the role of the 4$f$ moment on the magnetoelectric (ME) effect of orthorhombic $R$MnO$_{3}$ ($R$=rare earth ions). In order to clarify the role of the 4$f$ moment, we prepared three samples: (Eu,Y)MnO$_{3}$ without the…

Strongly Correlated Electrons · Physics 2007-05-23 K. Noda , M. Akaki , F. Nakamura , D. Akahoshi , H. Kuwahara