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Artificial ferromagnetic nanofiber networks with new electronic, magnetic, mechanical and other physical properties can be prepared by electrospinning and may be regarded as the base of bio-inspired cognitive computing units. For this…

Materials Science · Physics 2018-10-17 Tomasz Blachowicz , Andrea Ehrmann

We have studied the magnetic reversal of L-shaped nanostructures fabricated from (Ga,Mn)As. The strain relaxation due to the lithographic patterning results in each arm having a uniaxial magnetic anisotropy. Our analysis confirms that the…

Materials Science · Physics 2009-08-12 J. A. Haigh , M. Wang , A. W. Rushforth , E. Ahmad , K. W. Edmonds , R. P. Campion , C. T. Foxon , B. L. Gallagher

The magnetoresistance (MR) associated with domain boundaries has been investigated in microfabricated bcc Fe (0.65 to 20 $\mu$m linewidth) wires with controlled stripe domains. Domain configurations have been characterized using magnetic…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 A. D. Kent , U. Ruediger , J. Yu , S. Zhang , P. M. Levy , Y. Zhong , S. S. P. Parkin

Several recent experimental studies have confirmed the possibility of switching the magnetization direction in the small magnetic domains by pumping large spin-polarized currents through them. On the basis of equations proposed by…

Condensed Matter · Physics 2009-10-31 Ya. B. Bazaliy , B. A. Jones , Shou-Cheng Zhang

Dynamics and textures of magnetic domain walls (DWs) may largely alter the electronic behaviors in a Weyl semimetal system via emergent gauge fields. However, very little is known about even the basic properties of these domain walls in…

Strongly Correlated Electrons · Physics 2021-06-01 Bochao Xu , Jacob Franklin , Hung-Yu Yang , Fazel Tafti , Ilya Sochnikov

This paper introduces a new approach for simulating magnetic properties of nanocomposites comprising magnetic particles embedded in a non-magnetic matrix, taking into account the 3D structure of the system in which particles' positions…

Mesoscale and Nanoscale Physics · Physics 2014-10-22 R. F. Neumann , M. Bahiana , L. G. Paterno , M. A. G. Soler , J. P. Sinnecker , J. G. Wen , P. C. Morais

The magnetostatic interaction between two oppositely charged transverse domain walls (DWs)in adjacent Permalloy nanowires is experimentally demonstrated. The dependence of the pinning strength on wire separation is investigated for…

Materials Science · Physics 2015-05-13 Liam O'Brien , D. Petit , H. T. Zeng , E. R. Lewis , J. Sampaio , A. V. Jausovec , D. E. Read , R. P. Cowburn

We examine the substructures of magnetic domain walls (DWs) in [Pt/(Co/Ni)$_M$/Ir]$_N$ multi-layers using a combination of micromagnetic theory and Lorentz transmission electron microscopy (LTEM). Thermal stability calculations of Q=$\pm$1…

Interconnected magnetic nanowire (NW) networks offer a promising platform for 3-dimensional (3D) information storage and integrated neuromorphic computing. Here we report discrete propagation of magnetic states in interconnected Co nanowire…

Finding a new control parameter for magnetic domain wall (DW) motion in magnetic nanostructures is important in general and in particular for the spintronics applications. Here, we show that a circularly polarized magnetic field (CPMF) at…

Mesoscale and Nanoscale Physics · Physics 2010-01-13 P. Yan , X. R. Wang

Magnetic domain walls are pinned strongly by abrupt changes in magnetic anisotropy. When driven into oscillation by a spin-polarized current, locally pinned domain walls can be exploited as tunable sources of short-wavelength spin waves.…

Mesoscale and Nanoscale Physics · Physics 2018-08-29 Pavel Baláž , Sampo J. Hämäläinen , Sebastiaan van Dijken

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

We have explored the electric field controlled magnetization in the nanodot CoFe2O4/SrRuO3/PMN-PT heterostructures. Ordered ferromagnetic CFO nanodots (~300 nm lateral dimension) are developed on the PMN-PT substrate (ferroelectric as well…

We theoretically and experimentally analyze the pinning of a magnetic domain wall (DW) at engineered anisotropy variations in Pt/Co/Pt strips with perpendicular magnetic anisotropy. An analytical model is derived showing that a step in the…

Mesoscale and Nanoscale Physics · Physics 2011-12-19 Jeroen H. Franken , Mark Hoeijmakers , Reinoud Lavrijsen , Henk J. M. Swagten

The influence of the non-collinear magnetic configuration on Friedel is investigated theoretically. Specifically the influence of the magnetic configuration on the induced electric charge in a N\'{e}el type domain wall (DW) has been…

Mesoscale and Nanoscale Physics · Physics 2017-10-10 R. Ghanbary , A. Phirouznia

Scanning magnetometry with nitrogen-vacancy (NV) centers in diamond has emerged as a powerful microscopy for studying weak stray field patterns with nanometer resolution. Due to the internal crystal anisotropy of the spin defect, however,…

We present a rotary-stage microwave probe station suitable for magnetic films and spintronic devices. Two stages, one for field rotation from parallel to perpendicular to the sample plane (Out-of-Plane) and the other intended for field…

Materials Science · Physics 2016-07-18 Shikun He , Zhaoliang Meng , Lisen Huang , Lee Koon Yap , Tiejun Zhou , Christos Panagopoulos

The rapid development of nanoscience and nanotechnology in the last two decades was stimulated by the emergence of scanning probe microscopy (SPM) techniques capable of accessing local material properties, including transport, mechanical,…

We demonstrate that the different magnetic states of a Mn12 molecule can be distinguished in a two-probe transport experiment from a complete knowledge of the current-voltage curve. Our results, obtained with state-of-the-art…

Materials Science · Physics 2009-05-05 C. D. Pemmaraju , I. Rungger , S. Sanvito

A combination of experimental techniques, e.g. vector-MOKE magnetometry, Kerr microscopy and polarized neutron reflectometry, was applied to study the field induced evolution of the magnetization distribution over a periodic pattern of…