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N\'eel walls in soft magnetic NiFe/NiFeGa hybrid stripe structures surrounded by a NiFe film are investigated by high resolution Lorentz transmission electron microscopic imaging. An anti-parallel orientation of magnetization in 1000 nm…

Mesoscale and Nanoscale Physics · Physics 2015-10-07 M. A. Basith , S. McVitie , T. Strache , M. Fritzsche , A. Muecklich , J. Fassbender , J. McCordy

Magnetic skyrmions are promising for next-generation information storage and processing owing to their potential advantages in data storage density, robustness, and energy efficiency. The magnetic multilayers consisting of Pt, Co, and a…

We theoretically study the magnetization dynamics of a thin ferromagnetic film exchange-coupled with a surface of a strong three-dimensional topological insulator. We focus on the role of electronic zero modes imprinted by domain walls…

Mesoscale and Nanoscale Physics · Physics 2015-06-03 Yaroslav Tserkovnyak , Daniel Loss

Two-dimensional (2D) materials can host stable, long-range magnetic phases in the presence of underlying magnetic anisotropy. The ability to realize the full potential of 2D magnets necessitates systematic investigation of the role of…

Colossal magnetoresistance and field-induced ferromagnetism are well documented in manganite compounds. Since domain wall resistance contributes to magnetoresistance, data on the temperature and magnetic field dependence of the…

Strongly Correlated Electrons · Physics 2015-04-16 B. Bryant , Y. Moritomo , Y. Tokura , G. Aeppli

Spin-polarized low-energy electron microscopy was used to image a magnetite crystal with (100) surface orientation. Sets of spin-dependent images of magnetic domain patterns observed in this surface were used to map the direction of the…

Materials Science · Physics 2013-11-11 Juan de la Figuera , Lucía Vergara , Alpha T. N'Diaye , Adrian Quesada , Andreas K. Schmid

We study theoretically the structure of domain walls in ferromagnetic states on Mobius strips. A two-dimensional classical Heisenberg ferromagnet with single-site anisotropy is treated within a mean-field approximation by taking into…

Statistical Mechanics · Physics 2009-11-13 Masanao Yoneya , Kazuhiro Kuboki , Masahiko Hayashi

We present a general approach for studying the dynamics of domain walls in biaxial ferromagnetic stripes with functionally graded Dzyaloshinskii-Moriya interaction (DMI). By engineering the spatial profile of the DMI parameter we propose…

Strongly Correlated Electrons · Physics 2020-06-24 Kostiantyn V. Yershov , Volodymyr P. Kravchuk , Denis D. Sheka , Jeroen van den Brink , Avadh Saxena

Charge density wave (CDW) ordering in NbSe3 and the structurally related quasi one-dimensional compounds is reconsidered. Since the modulated ground state is characterized by unstable nano-domains, the structural information obtained from…

Mesoscale and Nanoscale Physics · Physics 2013-03-27 Albert Prodan , Herman J. P. van Midden , Erik Zupanič , Rok Žitko

We investigate magnetic domain walls in a single fcc Mn layer on Re(0001) employing spin-polarized STM, atom manipulation, and spin dynamics simulations. The low symmetry of the row-wise antiferromagnetic (1Q) state leads to a new type of…

Mesoscale and Nanoscale Physics · Physics 2021-06-16 Jonas Spethmann , Martin Grünebohm , Roland Wiesendanger , Kirsten von Bergmann , André Kubetzka

We study the effciency of the magnetoimpedance (MI) of thin-wall circumferentially ordered nanotubes in sub-GHz and GHz frequency regimes using micromagnetic simulations. We consider empty ferromagnetic tubes as well as tubes filled with…

Mesoscale and Nanoscale Physics · Physics 2018-09-05 Andrzej Janutka , Kacper Brzuszek

Magnetic skyrmions are promising candidates for the next generation of spintronic devices due to their small size and topologically protected structure. One challenge for using these magnetic states in applications lies on controlling the…

Mesoscale and Nanoscale Physics · Physics 2018-10-19 J. Brandão , D. A. Dugato , R. L. Seeger , J. C. Denardin , T. J. A. Mori , J. C. Cezar

The interfacial Dzyaloshinskii-Moriya interaction (DMI) in multilayers of heavy metal and ferromagnetic metals enables the stabilization of novel chiral spin structures such as skyrmions. Magnetic insulators, on the other hand can exhibit…

Recent studies on heterostructures of ultrathin ferromagnets sandwiched between a heavy metal layer and an oxide have highlighted the importance of spin-orbit coupling (SOC) and broken inversion symmetry in domain wall (DW) motion.…

Mesoscale and Nanoscale Physics · Physics 2018-02-15 S. Ali Nasseri , Simone Moretti , Eduardo Martinez , Claudio Serpico , Gianfranco Durin

Multilayer "ferromagnet-layered antiferromagnet" (Fe/Cr) structures frustrated due to the roughness of layer interfaces are studied by numerical modeling methods. The "thickness-roughness" phase diagrams for the case of thin ferromagnetic…

Materials Science · Physics 2016-08-31 V. D. Levchenko , A. I. Morosov , A. S. Sigov

Perpendicular magnetic anisotropy [Co/Pd]15 and L10-FePt nanowire arrays of period 63 nm with linewidths 38 nm and 27 nm and film thickness 27 nm and 20 nm respectively were fabricated using a self-assembled PS-b-PDMS diblock copolymer film…

High spatial resolution X-ray photo-emission electron microscopy technique has been used to study the influence of the dipolar coupling taking place between the NiFe and the Co ferromagnetic electrodes of micron sized, elliptical shaped…

The interfacial Dzyaloshinskii-Moriya interaction (DMI) of a heavy metal (HM)/ferromagnetic (FM) metal heterostructure is vital to the current-induced domain wall motion (CIDWM) at an ultrahigh velocity. However, strong DMI also tilts the…

Computational Physics · Physics 2018-12-18 Maokang Shen , Yue Zhang , Wei Luo , Long You , Xiaofei Yang

Mn4N thin film is one of the potential magnetic mediums for spintronic devices due to its ferrimagnetism with low magnetization, large perpendicular magnetic anisotropy (PMA), thermal stability, and large domain wall velocity. A recent…

Materials Science · Physics 2023-05-17 Wei Zhou , Chung Ting Ma , S. Joseph Poon

Results of extensive combined experimental and theoretical investigations on static and dynamic properties of Ir/Co/Pt multilayer with low uniaxial anisotropy and asymmetric Ir/Co and Co/Pt interfaces responsible for large interfacial…