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We study the fundamental magnetic states of disc-shaped ferromagnetic particles with a uniaxial anisotropy along the symmetry axis. Besides the monodomain, a bidomain state is also identified and studied both numerically and theoretically.…

材料科学 · 物理学 2009-11-10 S. Komineas , C. A. F. Vaz , J. A. C. Bland , N. Papanicolaou

The instability, dynamics and morphological transitions of patterns in thin liquid films on periodic striped surfaces (consisting of alternating less and more wettable stripes) are investigated based on 3-D nonlinear simulations that…

软凝聚态物质 · 物理学 2009-11-07 K. Kargupta , A. Sharma

The magnetoimpedance effect is a versatile tool to investigate ferromagnetic materials, revealing aspects on the fundamental physics associated to magnetization dynamics, broadband magnetic properties, important issues for current and…

材料科学 · 物理学 2015-06-23 M. A. Corrêa , F. Bohn , R. B. da Silva , R. L. Sommer

We use the electromagnetic stress tensor to describe the elongation of paramagnetic drops in uniform magnetic fields. This approach implies a linear relationship between the shape of the drops and the square of the applied field which we…

应用物理 · 物理学 2020-06-09 Jennifer Dodoo , Adam A. Stokes

The existence of high-temperature ferromagnetism in thin films and nanoparticles of oxides containing small quantities of magnetic dopants remains controversial. Some regard these materials as dilute magnetic semiconductors, while others…

材料科学 · 物理学 2015-05-18 J. M. D. Coey , P. Stamenov , R. D. Gunning , M. Venkatesan , K. Paul

Electronic and magnetic structure of $(100)$ films of K and Cs are calculated within the plane-wave projector augmented wave (PAW) formalism of the density functional theory (DFT) using both local spin density approximation (LSDA) and the…

材料科学 · 物理学 2007-11-30 Prasenjit Sen

We examine the shape of droplets atop deformable thin elastomeric films prepared with an anisotropic tension. As the droplets generate a deformation in the taut film through capillary forces, they assume a shape that is elongated along the…

软凝聚态物质 · 物理学 2017-05-17 Rafael D. Schulman , René Ledesma-Alonso , Thomas Salez , Elie Raphaël , Kari Dalnoki-Veress

The enigma of the emergent ferromagnetic state in tensile-strained LaCoO3 thin films remains to be explored because of the lack of a well agreed explanation. The direct magnetic imaging technique using a low-temperature magnetic force…

We study the magnetic dynamics of magnetoelectric antiferromagnetic thin films, where an unconventional boundary ferromagnetism coexists with the bulk N\'{e}el phase below the N\'{e}el temperature. The spin exchange between the two order…

介观与纳米尺度物理 · 物理学 2018-01-24 Ricardo Zarzuela , Se Kwon Kim , Yaroslav Tserkovnyak

The dynamics of a vortex in a thin-film ferromagnet resembles the motion of a charged massless particle in a uniform magnetic field. Similar dynamics is expected for other magnetic textures with a nonzero skyrmion number. However, recent…

介观与纳米尺度物理 · 物理学 2012-11-21 Imam Makhfudz , Benjamin Krueger , Oleg Tchernyshyov

Artificial antiferromagnets and synthetic metamagnets have attracted much attention recently due to their potential for many different applications. Under some simplifying assumptions these systems can be modeled by thin Ising metamagnetic…

统计力学 · 物理学 2011-10-18 Yen-Liang Chou , Michel Pleimling

Dewetting of thin liquid films is monitored in situ by atomic force microscopy, results are compared with simulations. The experimental setting is mimicked as close as possible using the experimental parameters including the effective…

软凝聚态物质 · 物理学 2007-05-23 Jürgen Becker , Günther Grün , Ralf Seemann , Karin Jacobs

We study the spectral density function of a two-dimensional electron liquid in a weak magnetic field, the filling factor $\nu\gg 1$. A hydrodynamic model for low-energy excitations of the liquid is developed. It is found that even at…

凝聚态物理 · 物理学 2016-08-31 I. L. Aleiner , H. U. Baranger , L. I. Glazman

We propose a model for predicting the fluctuations of electron states in thin films as function of film thickness. The model was derived based on the assumption of the existence of potential barrier fluctuations on the film surface. Since…

介观与纳米尺度物理 · 物理学 2016-01-19 Mikrajuddin Abdullah

The interaction behavior of solitons are defining characteristics of these nonlinear, coherent structures. Due to recent experimental observations, thin ferromagnetic films offer a promising medium in which to study the scattering…

介观与纳米尺度物理 · 物理学 2014-07-18 M. D. Maiden , L. D. Bookman , M. A. Hoefer

The interaction between a superconducting vortex in a type II superconducting film (SC) and a ferromagnet (FM) with out-of-plane magnetization is investigated theoretically within the London approximation. The dependence of the interaction…

超导电性 · 物理学 2009-11-10 M. V. Milosevic , F. M. Peeters

We consider a thin superconducting film with a magnetic dot with permanent magnetization (normal to the film) placed on it by a method based on London-Maxwell equations. For sufficiently high dot magnetization a single vortex appears in the…

超导电性 · 物理学 2009-01-14 Zoran Ristivojevic

Ferromagnetism was observed in a Pt(100) ultrathin film deposited on a SrTiO3(100) substrate. The ferromagnetism, which appears in films with thicknesses of 2.2-4.4 nm, periodically changes with a period of approximately 1 nm (5-6…

Holographic measurements on magnetised thin-film cobalt rings have demonstrated both onion and vortex states of magnetisation. For a ring in the vortex state, the difference between phases of electron paths that pass through the ring and…

仪器与探测器 · 物理学 2012-06-18 C. J. Edgcombe , A. Ionescu , J. C. Loudon , A. M. Blackburn , H. Kurebayashi , C. H. W. Barnes

There is demonstrated that an isotropic ferromagnetic Fermi liquid reveals instability of the ferromagnetic state in respect to the transversal inhomogeneous deviations of magnetization from equilibrium. The result was obtained by…

量子气体 · 物理学 2012-02-23 V. P. Mineev