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The dynamical motion of the magnetization plays a key role in the properties of magnetic materials. If the magnetization is initially away from the equilibrium direction in a magnetic nanoparticle, it will precess at a natural frequency…

介观与纳米尺度物理 · 物理学 2015-06-23 M. G. Phelps , K. L. Livesey , A. M. Ferona , R. E. Camley

Life is homochiral and homochirality is a fundamental feature of living systems on Earth. While the exact mechanism that led to homochirality is still not fully understood, any realistic scenario on the origins of life needs to address the…

A coupled chain of superconductor/ferromagnet/superconductor (S/F/S) with anomalous ground phase shift phi_0 represents a system realizing long-range interaction between magnetic moments of the weak links. The interaction is of…

超导电性 · 物理学 2024-03-19 G. A. Bobkov , I. V. Bobkova , A. M. Bobkov

We investigate the anisotropic nature of magnetocrystalline coupling between the crystallographic and skyrmion crystal (SKX) lattices in the chiral magnet MnSi by magnetic field-angle resolved resonant ultrasound spectroscopy. Abrupt…

Patterned arrays of ferromagnetic nanoparticles of Co, Ni, and Fe_{\text{50}} Co_{\text{50}} have been synthesized from their ultrathin metal films on SiO_{\text{2}} substrate by nanosecond laser-induced self-organization. The morphology,…

材料科学 · 物理学 2010-01-11 H. Krishna , A. K. Gangopadhyay , J. Strader , R. Kalyanaraman

Magnetic anisotropy is one of the important factors in determining magnetic structures. A type of magnetic anisotropy is closely related to the symmetry of crystals. We theoretically investigate magnetic anisotropy and its related magnetic…

强关联电子 · 物理学 2024-05-22 Akane Inda , Satoru Hayami

The magnetic skyrmion structure can be formed in the chiral magnets (CMs) with strong Dzyaloshinskii-Moriya interactions. In this work, we propose a way of artificially tailoring the topological details of the skyrmion such as its radial…

介观与纳米尺度物理 · 物理学 2016-10-06 Yin-Yan Zhang , Rui Zhu

We investigate magnetization reversal processes of magnetic nanorings. Using a recently developed efficient cartesian coordinates fast multipole method, magnetization switching phase diagrams are constructed for such structures. We find…

介观与纳米尺度物理 · 物理学 2015-05-14 Wen Zhang , Stephan Haas

Magnetism - the spontaneous alignment of atomic moments in a material - is driven by quantum-mechanical `exchange' interactions which operate over atomic distances as a result of the fundamental symmetry of electrons. Currently, one of the…

A simple discrete model for magnetic structures of chromium nanoclusters, found with the help of local-spin DFT by Kohl and Bertsch, still confirms their conclusion that in most of the clusters the magnetic moments are not collinear;…

统计力学 · 物理学 2007-05-23 Ana Proykova , Dietrich Stauffer

The magnetic behavior of truncated conical nanoparticles in patterned thin films is investigated as a function of their size and shape. Using a scaling technique, phase diagrams giving the relative stability of characteristic internal…

介观与纳米尺度物理 · 物理学 2011-06-16 J. Escrig , P. Landeros , J. C. Retamal , D. Altbir , J. d'Albuquerque e Castro

We study analytically the precessional switching of the magnetization of a thin macrospin. We analyze its response when subjected to an external field along its in-plane hard axis. We derive the exact trajectories of the magnetization. The…

强关联电子 · 物理学 2009-11-10 T. Devolder , C. Chappert

Shell ferromagnetism is a new functional property of certain Heusler alloys which has been recently observed in $\mathrm{Ni}_{50}\mathrm{Mn}_{45}\mathrm{In}_{5}$. We report the results of a comparative study of the magnetic microstructure…

The interplay between structural and magnetic properties of nanostructured magnetic materials allows to realize unconventional magnetic effects, which results in a demand for experimental techniques to determine the magnetization profile…

介观与纳米尺度物理 · 物理学 2020-04-08 Dirk Honecker , Luis Fernández Barquín , Philipp Bender

We present a theory of magnetization reversal due to thermal fluctuations in thin submicron-scale rings composed of soft magnetic materials. The magnetization in such geometries is more stable against reversal than that in thin needles and…

介观与纳米尺度物理 · 物理学 2009-11-10 Kirsten Martens , D. L. Stein , A. D. Kent

We use a machine learning approach to identify the importance of microstructure characteristics in causing magnetization reversal in ideally structured large-grained Nd$_2$Fe$_{14}$B permanent magnets. The embedded Stoner-Wohlfarth method…

Magnetic nanoparticles (MNPs) have been proposed as an ultimate solution for diverse applications including nanomedicine and logic devices over decades. However, none has emerged revolutionary because realizing their magnetization response…

应用物理 · 物理学 2020-02-19 Mohammad Reza Zamani Kouhpanji , Pieter B Visscher , Bethanie J H Stadler

Low dimensional magnetic systems (such as spin-chain) are extensively studied due to their exotic magnetic properties. Here, we would like to address that such systems should also be interesting in the field of dielectric, ferroelectricity…

We analyze the spontaneous magnetization reversal of supported monoatomic chains of finite length due to thermal fluctuations via atomistic spin-dynamics simulations. Our approach is based on the integration of the Landau-Lifshitz equation…

材料科学 · 物理学 2011-09-19 David S. G. Bauer , Phivos Mavropoulos , Samir Lounis , Stefan Blügel

Combining pairs of ferromagnetic metals with different signs of scattering anisotropies, let us independently invert the magnetoresistance and the direction of current-driven switching in ferromagnetic/non-magnetic/ferromagnetic metal…

材料科学 · 物理学 2013-05-29 M. AlHajDarwish , H. Kurt , S. Urazhdin , A. Fert , R. Loloee , W. P. Pratt , J. Bass