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The Dzyaloshinskii-Moriya interaction (DMI) causes domain walls in perpendicular magnetized systems to adopt a homochiral configuration by winding in the same direction for both Up-Down and Down-Up walls. The topology of these domain walls…

Mesoscale and Nanoscale Physics · Physics 2018-06-04 G. V. Karnad , E. Martinez , M. Voto , T. Schulz , B. Ocker , D. Ravelosona , M. Kläui

We report investigations of the magnetic textures in periodic [Pt(1 nm)/(CoFeB(0.8 nm)/Ru(1.4 nm)]$_{10}$ multilayers using polarised neutron reflectometry (PNR) and small-angle neutron scattering (SANS). The multilayers are known to host…

In ferromagnetic materials, the rich dynamics of magnetic domain walls (DWs) under magnetic field or current have been successfully described using the well-known q-{\phi} analytical model. We demonstrate here that this simple…

Materials Science · Physics 2021-02-03 Eloi Haltz , Sachin Krishnia , Léo Berges , Alexandra Mougin , João Sampaio

The domain structure of a MnSb$_2$Te$_4$ single crystal with a Curie temperature $T_C \approx 45~K$ was studied using the high-resolution Bitter decoration technique. Magnetotransport measurements confirm a soft ferromagnetic ordering with…

We present a theoretical investigation of electron states hosted by magnetic domain walls on the 3D topological insulator surface. The consideration includes the domain walls with distinct vectorial and spatial textures. The study is…

Mesoscale and Nanoscale Physics · Physics 2021-07-21 I. P. Rusinov , V. N. Men'shov , E. V. Chulkov

The interfacial Dzyaloshinskii Moriya Interaction (DMI) in ultrathin magnetic thin film heterostructures provides a new approach for controlling spin textures on mesoscopic length scales. Here we investigate the dependence of the…

Recent advances in the understanding of spin orbital effects in ultrathin magnetic heterostructures have opened new paradigms to control magnetic moments electrically. The Dzyaloshinskii-Moriya interaction (DMI) is said to play a key role…

Mesoscale and Nanoscale Physics · Physics 2015-06-18 Jacob Torrejon , Junyeon Kim , Jaivardhan Sinha , Seiji Mitani , Masamitsu Hayashi , Michihiko Yamanouchi , Hideo Ohno

The in-plane orientation of the magnetization in the center of domain walls is measured in Co/Ir(111) as a function of Co thickness via scanning electron microscopy with polarization analysis. Uncapped, thermally evaporated cobalt on an…

Mesoscale and Nanoscale Physics · Physics 2019-09-11 Fabian Kloodt-Twesten , Susanne Kuhrau , Hans Peter Oepen , Robert Frömter

We carried out measurements of domain wall (DW) velocities driven by magnetic field pulses in symmetric Pt/Co/Pt and asymmetric Pt/Co/AlOx, Pt/Co/GdOx and Pt/Co/Gd trilayers with ultrathin Co layers and perpendicular magnetic anisotropy. In…

Mesoscale and Nanoscale Physics · Physics 2016-04-11 Thai Ha Pham , J. Vogel , J. Sampaio , M. Vaňatka , J. -C. Rojas , M. Bonfim , D. S. Chaves , F. Choueikani , P. Ohresser , E. Otero , A. Thiaville , S. Pizzini

By combining Brillouin Light Scattering and micromagnetic simulations we studied the spin-wave dynamics of a Co/Pd thin film multilayer, features a stripe domain structure at remanence. The periodic up and down domains are separated by…

Mesoscale and Nanoscale Physics · Physics 2019-01-21 Chandrima Banerjee , Pawel Gruszecki , Jaroslaw W. Klos , Olav Hellwig , Maciej Krawczyk , Anjan Barman

We investigate the effect of curvature on the energy and stability of domain wall configurations in curved cylindrical nanotubes and nanowires. We use micromagnetic simulations to calculate the phase diagram for the transverse wall (TW) and…

Mesoscale and Nanoscale Physics · Physics 2021-06-22 L. Skoric , C. Donnelly , C. Abert , A. Hierro-Rodriguez , D. Suess , A. Fernández-Pacheco

We have investigated the ferrimagnetic domain structure in a Gd$_{0.67}$Ca$_{0.33}$MnO$_{3}$ thin film using magnetic force microscopy. We observe clear signs of phase separation, with magnetic islands embedded in a non-magnetic matrix. We…

Strongly Correlated Electrons · Physics 2015-06-03 Jeehoon Kim , N. Haberkorn , Leonardo Civale , Evgeny Nazaretski , Paul Dowden , Avadh Saxena , J. D. Thompson , Roman Movshovich

We investigate the formation of stable one-dimensional N\'eel walls in a ferromagnetic slab with finite thickness and finite width. Taking into account the dipolar, the exchange and the uniaxial anisotropic crystalline field interactions,…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Rafael M. Fernandes , Harry Westfahl , Rogério Magalhães-Paniago , Leticia N. Coelho

We study theoretically the dynamics of composite domain walls (DW) in multiferroic material GdFeO${}_3$ driven by magnetic field $H$. Two antiferromagnetic orders of Fe and Gd spins interact Gd-ion displacement in this system with coupling…

Mesoscale and Nanoscale Physics · Physics 2020-12-29 Koji Kawahara , Hirokazu Tsunetsugu

We perform a study of domain walls in Co/Ir$_n$/Pt(111) (n = 0,1,...,6) films by a combined approach of first-principles calculations and spin dynamics simulations. We determine the tensorial exchange interactions and the magnetic…

Mesoscale and Nanoscale Physics · Physics 2017-01-04 Gy. J. Vida , E. Simon , L. Rózsa , K. Palotás , L. Szunyogh

Using spin dependent specular and off-specular polarized neutron reflectivity (PNR), we report the observation of a twisted helical magnetic structure with planar 2{\pi} domain wall (DW) and highly correlated magnetic domains in a Gd/Co…

Mesoscale and Nanoscale Physics · Physics 2019-10-16 Surendra Singh , M. A. Basha , C. L. Prajapat , Harsh Bhatt , Yogesh Kumar , M. Gupta , C. J. Kinane , J. Cooper , M. R. Gonal , S. Langridge , S. Basu

Magnetic skyrmions are topological spin configurations in materials with chiral Dzyaloshinskii-Moriya interaction (DMI), that are potentially useful for storing or processing information. To date, DMI has been found in few bulk materials,…

Mesoscale and Nanoscale Physics · Physics 2017-06-28 Dusan Stosic , Jeroen Mulkers , Bartel Van Waeyenberge , Teresa Ludermir , Milorad V. Milošević

Domain structures in CoFeB-MgO thin films with a perpendicular easy magnetization axis were observed by magneto-optic Kerr-effect microscopy at various temperatures. The domain wall surface energy was obtained by analyzing the spatial…

Materials Science · Physics 2012-02-24 M. Yamanouchi , A. Jander , P. Dhagat , S. Ikeda , F. Matsukura , H. Ohno

Domain wall motion along ferrimagnets is evaluated using micromagnetic simulations and a collective-coordinates model, both considering two sublattices with independent parameters. Analytical expressions are derived for strips on top of…

Applied Physics · Physics 2020-11-20 Eduardo Martínez , Víctor Raposo , Óscar Alejos

Domain walls in soft permalloy strips may exhibit various equilibrium micromagnetic structures depending on the width and thickness of the strip, ranging from the well-known transverse and vortex walls in narrow and thin strips to double…

Mesoscale and Nanoscale Physics · Physics 2016-03-23 Virginia Estevez , Lasse Laurson