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We report an experimental investigation of the spontaneous motion of liquid droplets on soft gels with a crosslinking gradient. By systematically adjusting the spatial difference in crosslinking density, we observed that millimeter-sized…

Soft Condensed Matter · Physics 2025-01-29 Weiwei Zhao , Wenjie Qian , Chang Xu , Qin Xu

Localized particle-like spin textures have been found to exhibit emergent electromagnetic properties, which hold promise for the development of intriguing spintronic devices. Among these textures, magnetic bubbles represent localized spin…

Submillimeter air-borne drops of well defined size are notoriously difficult to produce in the lab. Here, we demonstrate that any simple droplet dripper, in which millimetric droplets are created by letting them drip under gravity from a…

Fluid Dynamics · Physics 2019-10-17 K. S. Surabhi , Sander Wildeman

The dynamic coupling between spin and charge currents in non-magnetic conductors is considered. As a consequence of this coupling, the spin dynamics is directly reflected in the electrical impedance of the sample, with a relevant frequency…

Mesoscale and Nanoscale Physics · Physics 2019-08-14 P. S. Alekseev , M. I. Dyakonov

Spiral spin liquids are unique classical spin liquids that occur in many frustrated spin systems, but do not comprise a new phase of matter. Owing to extensive classical ground-state degeneracy, the spins in a spiral spin liquid thermally…

Strongly Correlated Electrons · Physics 2021-06-01 Xu-Ping Yao , Jian Qiao Liu , Chun-Jiong Huang , Xiaoqun Wang , Gang Chen

Dispersion of tubules made of diacetylenic phospholipids (DC 8,9 PC), in aqueous colloidal dispersions of magnetic nanoparticles is studied as a function of the sign of particles surface charges. In every case the tubule-vesicle transition…

Soft Condensed Matter · Physics 2019-10-14 Damien Letellier , Olivier Sandre , Christine Ménager , Valérie Cabuil , Michel Lavergne

In ultrathin ferromagnets deposited on metallic substrates, excitation of precessional motion of the spins produces a spin current in the substrate that transports angular momentum out of the film. This phenomenon is referred to as spin…

Mesoscale and Nanoscale Physics · Physics 2011-12-06 F. S. M. Guimarães , A. T. Costa , R. B. Muniz , D. L. Mills

A spin current - a flow of spin angular momentum - can be carried either by spin polarised free electrons or by magnons, the quanta of a moving collective oscillation of localised electron spins - a spin wave. Traditionally, it was assumed,…

Chiral spin pumping is the generation of a unidirectional spin current in half of ferromagnetic films or conductors by dynamic dipolar stray fields from close-by nanomagnets. We formulate a general theory of long-range chiral interactions…

Mesoscale and Nanoscale Physics · Physics 2020-08-26 Tao Yu , Hanchen Wang , Michael A. Sentef , Haiming Yu , Gerrit E. W. Bauer

Magnetic skyrmions are small swirling topological defects in the magnetization texture stabilized by the protection due to their topology. In most cases they are induced by chiral interactions between atomic spins existing in…

Materials Science · Physics 2017-12-21 Albert Fert , Nicolas Reyren , Vincent Cros

This is an entry for the Gallery of Fluid Motion of the 65st Annual Meeting of the APS-DFD (fluid dynamics video). This video shows the motion of levitated liquid droplets. The levitation is produced by the vertical vibration of a liquid…

Fluid Dynamics · Physics 2012-10-15 Pablo Cabrera-Garcia , Roberto Zenit

The generation, manipulation and detection of spin-polarized electrons in nanostructures define the main challenges of spin-based electronics[1]. Amongst the different approaches for spin generation and manipulation, spin-orbit coupling,…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Sergio O. Valenzuela , M. Tinkham

Droplet interactions with solid surfaces are fundamental to natural phenomena and hold significant commercial relevance across diverse applications. While the impingement dynamics of conventional aqueous droplets on solid substrates are…

Fluid Dynamics · Physics 2025-08-07 Ram Krishna Shah , Saptarshi Mandal

We present experimental studies of the current pumped through a dynamic quantum dot over a wide range of magnetic fields. At low fields we observe repeatable structure indicating increased confinement of the electrons in the dynamic dot. At…

Measurements of magnetic hysteresis loops in single Co nanoparticles at dilution refrigerator temperatures are presented. The nanoparticles are in electric contact with bulk Al leads via tunnel junctions. The tunnel current versus magnetic…

Mesoscale and Nanoscale Physics · Physics 2012-07-10 F. Tijiwa Birk , W. Jiang , D. Davidović

We propose a generic model for thin films and shallow drops of a polar active liquid that have a free surface and are in contact with a solid substrate. The model couples evolution equations for the film height and the local polarization…

Fluid Dynamics · Physics 2021-07-20 Sarah Trinschek , Fenna Stegemerten , Karin John , Uwe Thiele

Using micromagnetics we demonstrate that the r.f. field produced by a spin valve can be used to reverse the magnetization in a magnetic nanoparticle. The r.f. field is generated using a current that specifically excites a uniform spin wave…

Materials Science · Physics 2009-11-13 K. Rivkin , J. Ketterson , W. Saslow

Magnetic bubbles are topologically spin textures that offering the interesting physics and great promise for next-generation information storage technologies. The main obstacles so far are that magnetic bubbles are generated with no field…

Spintronics is concerned with replacing charge current with current of spin, the electron's intrinsic angular momentum. In magnetic insulators, spin currents are carried by magnons, the quanta of spin-wave excitations on top of the…

Mesoscale and Nanoscale Physics · Physics 2025-02-24 Samuel Mañas-Valero , Toeno van der Sar , Rembert A. Duine , Bart van Wees

The miniaturization of spintronic devices, specifically, nanoscale devices employing spintronics, has attracted intensive attention from a scientific as well as engineering perspective. In this paper, we study non-Markovian effect on spin…

Mesoscale and Nanoscale Physics · Physics 2019-05-16 Kazunari Hashimoto , Gen Tatara , Chikako Uchiyama
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