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Array-patterned CoPd-based heterostructures are created through e-beam lithography and plasma pretreatment that induces oxidation with depth gradient in the CoPd alloy films, breaking the central symmetry of the structure. Effects on the…

Mesoscale and Nanoscale Physics · Physics 2022-04-27 Wei-Hsiang Wang , Ching-Yang Pan , Chak-Ming Liu , Wen-Chin Lin , Pei-hsun Jiang

Magnetic shape memory alloys exhibit a hierarchically twinned microstructure, which has been well examined in epitaxial Ni-Mn-Ga films. Here we analyze consequences of this twin within twins microstructure on the magnetic domain pattern.…

Materials Science · Physics 2015-06-12 Anett Diestel , Volker Neu , Anja Backen , Ludwig Schultz , Sebastian Fähler

Magnetars have been suggested as the most promising site for the origin of observed soft gamma-ray repeaters (SGRs) and anomalous X-ray pulsars (AXPs). In this work we investigate the possibility that SGRs and AXPs might be observational…

High Energy Astrophysical Phenomena · Physics 2015-05-18 In-Saeng Suh , Grant J. Mathews

The combined action of a transverse spin-polarized current and the current-induced {\O}rsted field on long ferromagnetic nanostripes is studied numerically and analytically. The magnetization behavior is analyzed for stripes with various…

Mesoscale and Nanoscale Physics · Physics 2015-02-23 Oleksii M. Volkov , Volodymyr P. Kravchuk , Denis D. Sheka , Yuri Gaididei , Franz G. Mertens

The interplay between intrinsic and surface/interface-induced magnetic anisotropies strongly in- fluences magnetization processes in nanomagnetic systems. We develop a micromagnetic theory to describe the field-driven reorientation in…

Mesoscale and Nanoscale Physics · Physics 2016-07-12 A. A. Leonov , U. K. Roessler , A. N. Bogdanov

Recent scanning tunneling microscopy in the superconducting regime of two different cuprate families has revealed unidirectional bond-centered modulation in the local electronic density of states. Motivated by this result we investigate the…

Strongly Correlated Electrons · Physics 2008-07-14 Marcin Raczkowski

Refraction of wave propagation in a corotating pulsar magnetospheric plasma is considered as a possible interpretation for observed asymmetric pulse profiles with multiple components. The pulsar radio emission produced inside the…

Astrophysics · Physics 2009-11-10 D. Fussell , Q. Luo

Observations of magnetically active close binaries with orbital periods of a few days reveal the existence of starspots at preferred longitudes (with respect to the direction of the companion star). We numerically investigate the non-linear…

Astrophysics · Physics 2009-11-07 V. Holzwarth , M. Schuessler

We have performed an experimental and modeling-based study of the spin-orbit torque-induced growth of magnetic stripe domains in heavy metal/ferromagnet thin-film heterostructures that possess chiral N\'eel-type domain walls due to an…

Mesoscale and Nanoscale Physics · Physics 2023-05-04 Jeffrey A. Brock , Daan Swinkels , Bert Koopmans , Eric E. Fullerton

We establish a novel mechanism of stripe formation in doped systems with alternating $t_{2g}$ orbital order --- the stripe takes the form of a ferro-orbitally ordered domain wall separating domains with staggered order and allowing for…

Strongly Correlated Electrons · Physics 2010-05-20 Piotr Wrobel , Andrzej M. Oles

A large-scale cosmic magnetic field affects not only the growth of density perturbations, but also rotational instabilities and anisotropic deformation in the density distribution. We give a fully relativistic treatment of all these…

Astrophysics · Physics 2008-11-26 Christos Tsagas , Roy Maartens

A model is introduced for the theoretical description of nanoscale magnetic films with high perpendicular anisotropy. In the model the magnetic film is described in terms of single domain magnetic grains, interacting via exchange as well as…

Condensed Matter · Physics 2009-10-28 U. Nowak

Domain wall propagation has been measured in continuous, weakly disordered, quasi-two-dimensional, Ising-like magnetic layers that are subject to spatially periodic domain wall pinning potentials. The potentials are generated…

Mesoscale and Nanoscale Physics · Physics 2013-04-30 P. J. Metaxas , P. -J. Zermatten , R. L. Novak , S. Rohart , J. -P. Jamet , R. Weil , J. Ferré , A. Mougin , R. L. Stamps , G. Gaudin , V. Baltz , B. Rodmacq

A new characteristic is observed in the training effect of perpendicular exchange bias. For Pt/Co/Pt/IrMn multilayers with perpendicular magnetic anisotropy, the magnetization reversal process is accompanied by pinned domain wall motion and…

Materials Science · Physics 2010-04-05 Z. Shi , S. M. Zhou

The domain structure in in-plane magnetized Fe/Ni/W(110) films is investigated using spin-polarized low-energy electron microscopy. A novel transition of the domain wall shape from a zigzag-like pattern to straight is observed as a function…

Mesoscale and Nanoscale Physics · Physics 2021-08-26 Gong Chen , MacCallum Robertson , Heeyoung Kwon , Changyeon Won , Andreas K. Schmid , Kai Liu

In elastically coupled multiferroic heterostructures that exhibit full domain correlations between ferroelectric and ferromagnetic sub-systems, magnetic domain walls are firmly pinned on top of ferroelectric domain boundaries. In this work…

Optimizing magnetic thin films for nanotechnologies often requires imaging nanoscale magnetic domain patterns via magnetic microscopy. The finite size of the image may however significantly affect the characterization of the observed…

Mesoscale and Nanoscale Physics · Physics 2023-01-31 Michael Vaka , Joey Ray , Misael Campos , Karine Chesnel

We investigate the structure of magnetic domain walls in a classical double exchange ferromagnet, evaluating domain wall energies and charges. Three different cases are studied: (i) a conventional smooth Bloch wall, (ii) an abrupt…

Strongly Correlated Electrons · Physics 2008-11-26 D. I. Golosov

In this work we show the presence of a magnetoelectric coupling in silicon-nitride gated Pt/Co/Pt heterostructures using X-ray photoemission electron microscopy (XPEEM). We observe a change in magnetic anisotropy in the form of domain wall…

Primordial magnetic fields (PMFs) offer a compelling explanation for the origin of observed magnetic fields, especially on extragalactic scales. Such PMFs give rise to excess of power in small scale matter perturbations that could strongly…

Cosmology and Nongalactic Astrophysics · Physics 2023-06-22 Tal Adi , Sarah Libanore , Hector Afonso G. Cruz , Ely D. Kovetz