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A central goal in spintronics and magnonics is the use of spin waves rather than electrons for efficient information processing. The key to integrate such spintronic circuits with electronic circuits is the ability to inject, control and…

Mesoscale and Nanoscale Physics · Physics 2024-08-28 J. S. Harms , H. Y. Yuan , Rembert A. Duine

Finding new energy-efficient methods for exciting magnetization dynamics is one of the key challenges in magnonics. In this work, we present an approach to excite the gyrotropic dynamics of magnetic vortices through the phenomenon of…

Applied Physics · Physics 2023-09-12 A. Koujok , A. Riveros , D. R. Rodrigues , G. Finocchio , M. Weiler , A. Hamadeh , P. Pirro

The magnetic vortex with the in-plane curling magnetization and the out-of-plane magnetization at the core is a unique ground state in nanoscale magnetic elements. This kind of magnetic vortex can be used as a memory unit for information…

Materials Science · Physics 2010-02-03 Konstantin Yu. Guslienko , Ki-Suk Lee , Sang-Koog Kim

We focus on an in-depth study of the forced dynamics of a ferromagnetic single-domain uniaxial nanoparticle placed in a viscous fluid and driven by an external rotating magnetic field. The process of conversion of magnetic and mechanical…

Mesoscale and Nanoscale Physics · Physics 2018-12-11 T. V. Lyutyy , O. M. Hryshko , M. Yu. Yakovenko

Antivortices in ferromagnetic thin-film elements are in-plane magnetization configurations with a core pointing perpendicular to the plane. By using micromagnetic simulations, we find that magnetic antivortices gyrate on elliptical orbits…

Other Condensed Matter · Physics 2009-11-13 Andre Drews , Benjamin Krueger , Markus Bolte , Guido Meier

We demonstrate a high-quality spin orbit torque nano-oscillator comprised of spin wave modes confined by the magnetic field by the strongly inhomogeneous dipole field of a nearby micromagnet. This approach enables variable spatial…

Mesoscale and Nanoscale Physics · Physics 2021-12-28 Chi Zhang , Inhee Lee , Yong Pu , Sergei A. Manuilov , Denis V. Pelekhov , P. Chris Hammel

We report the experimental and theoretical characterization of the angular-dependent spin dynamics in arrays of ferromagnetic nanodisks arranged on a honeycomb lattice. The magnetic field and microwave frequency dependence, measured by…

Mesoscale and Nanoscale Physics · Physics 2020-05-19 Mojtaba Taghipour Kaffash , Wonbae Bang , Sergi Lendinez , Axel Hoffmann , John B. Ketterson , M. Benjamin Jungfleisch

A magnetic vortex has attracted significant attention since it is a topologically stable magnetic structure in a soft magnetic nanodisk. Many studies have been devoted to understanding the nature of magnetic vortex in isolated systems. Here…

Materials Science · Physics 2016-12-14 Weinan Zhou , Takeshi Seki , Hiroko Arai , Hiroshi Imamura , Koki Takanashi

Electric-field control of magnetism without electric currents potentially revolutionizes spintronics towards ultralow power. Here by using mechanically coupled phase field simulations, we computationally demonstrate the application of the…

Materials Science · Physics 2017-02-22 Min Yi , Bai-Xiang Xu , Dietmar Gross

Thermally-driven spin-transfer torques have recently been reported in electrically insulating ferromagnet$|$normal-metal heterostructures. In this paper, we propose two physically distinct mechanisms for such torques. The first is a local…

Mesoscale and Nanoscale Physics · Physics 2016-02-24 Scott A. Bender , Yaroslav Tserkovnyak

We investigated the spin dynamics of a vortex state in a core-shell magnetic nanodisk driven by an oscillating field applied perpendicular to the disk plane by means of micromagnetic simulations. The nanodisk comprises a Py (Fe0.2Ni0.8)…

Mesoscale and Nanoscale Physics · Physics 2018-08-01 Huirong Zhao , Ruifang Wang

We study the magnetisation dynamics of a bulk single crystal Cr$_2$Ge$_2$Te$_6$ (CGT), by means of broadband ferromagnetic resonance (FMR), for temperatures from 60 K down to 2 K. We determine the Kittel relations of the fundamental FMR…

Materials Science · Physics 2019-11-05 S. Khan , C. W. Zollitsch , D. M. Arroo , H. Cheng , I. Verzhbitskiy , A. Sud , Y. P. Feng , G. Eda , H. Kurebayashi

We present a scanning transmission x-ray microscopy setup combined with a novel microwave synchronization scheme in order to study high frequency magnetization dynamics at synchrotron light sources. The sensitivity necessary to detect small…

In spin caloritronics, a branch of spintronics, the spin degree of freedom is exploited for thermoelectric conversion and thermal transport. Since the inception of spin caloritronics, many experimental and theoretical studies have focused…

Materials Science · Physics 2021-11-04 Ken-ichi Uchida , Ryo Iguchi

According to the standard thin disc theory, it is predicted that the radiation-pressure-dominated inner region of a thin disc is thermally unstable, while observations suggest that it is common for a thin disc of more than 0.01 Eddington…

High Energy Astrophysical Phenomena · Physics 2023-09-25 Yu Zhao , Xiao-Hong Yang , Li Xue , Shuang-Liang Li

Twisted spin waves attracted research attentions lately and the orbital angular momentum they carry may be utilized in communication and computing technologies. In this work, we manifest by micromagnetic simulations that twisted spin wave…

Mesoscale and Nanoscale Physics · Physics 2021-06-09 Peiyuan Huang1 , Ruifang Wang

We present an experimental study of macroscopic and microscopic magnetic anisotropy of a spin tetramer system \cso using torque magnetometry and ESR spectroscopy. Large rotation of macroscopic magnetic axes with temperature observed from…

Strongly Correlated Electrons · Physics 2016-08-08 Mirta Herak , Dijana Žilić , Dubravka Matković Čalogović , Helmuth Berger

The control of magnetic properties by means of an electric field is an important aspect in magnetism and magnetoelectronics. We here utilize magnetoelastic coupling in ferromagnetic/piezoelectric hybrids to realize a voltage control of…

We study the dynamics of polar core vortices in the easy plane phase of an atomic spin-1 Bose-Einstein condensate confined in a two-dimensional disc potential. A single vortex moves radially outward due to its interaction with background…

Quantum Gases · Physics 2025-10-30 Matthew Edmonds , Lewis A. Williamson , Matthew J. Davis

The ability of spintronic devices to utilize an electric current for manipulating the magnetization has resulted in large-scale developments, such as, magnetic random access memories and boosted the spintronic research area. In this regard,…

Mesoscale and Nanoscale Physics · Physics 2018-08-22 Rajagopalan Ramaswamy , Jong Min Lee , Kaiming Cai , Hyunsoo Yang