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In ultrathin ferromagnetic films sandwiched between two distinct heavy metal layers or between a heavy metal and an oxide layer, the Dzyaloshinskii-Moriya interaction (DMI) is of interfacial origin. Its chirality and strength are determined…

A magnetic skyrmion is a topological object that can exist as a solitary embedded in the vast ferromagnetic phase, or coexists with a group of its "siblings" in various stripy phases as well as skyrmion crystals (SkXs). Isolated skyrmions…

Mesoscale and Nanoscale Physics · Physics 2021-03-25 H. T. Wu , X. C. Hu , K. Y. Jing , X. R. Wang

Monoaxial chiral magnets can form a noncollinear twisted spin structure called the chiral helimagnetic state. We study magnetic properties of such a chiral helimagnetic state, with emphasis on the effect of itinerant electrons. Modeling a…

Strongly Correlated Electrons · Physics 2018-05-23 Shun Okumura , Yasuyuki Kato , Yukitoshi Motome

I consider skyrmionic states in non-centrosymmetric magnets near the ordering temperatures. I show that the interaction between the chiral skyrmions, being repulsive in a broad temperature range, changes into attraction at high…

Strongly Correlated Electrons · Physics 2016-11-25 Andriy O. Leonov

The Dzyaloshinskii-Moriya interaction (DMI), which only exists in noncentrosymmetric systems, is responsible for the formation of exotic chiral magnetic states. The absence of DMI in most two-dimensional (2D) magnetic materials is due to…

Materials Science · Physics 2020-05-06 Jinghua Liang , Weiwei Wang , Haifeng Du , Ali Hallal , Karin Garcia , Mairbek Chshiev , Albert Fert , Hongxin Yang

We study both analytically and numerically the edge of two-dimensional ferromagnets with Dzyaloshinskii-Moriya (DM) interactions, considering both chiral magnets and magnets with interface-induced DM interactions. We show that in the…

Strongly Correlated Electrons · Physics 2017-02-14 Jan Müller , Achim Rosch , Markus Garst

Multilayers of heavy metals and ferromagnets are the basis for the formation of various structures with inhomogeneous chiral magnetic distributions. The most informative method for studying magnetic states in such structures with a high…

Materials Science · Physics 2021-01-08 D. A. Tatarskiy , N. S. Gusev , S. A. Gusev

We propose an alternative route to stabilize magnetic skyrmion textures which does not require Dzyaloshinkii-Moriya interaction, magnetic anisotropy, or an external Zeeman field. Instead, it solely relies on the emergence of flux in the…

Mesoscale and Nanoscale Physics · Physics 2023-03-02 Yun-Peng Huang , Panagiotis Kotetes

Magnetometry and magnetoresistance measurements in MnSi thin films and rigorous analytical solutions of the micromagnetic equations show that the field-induced unwinding of confined helicoids occurs via discrete steps. A comparison between…

Mesoscale and Nanoscale Physics · Physics 2015-06-16 M. N. Wilson , E. A. Karhu , D. P. Lake , A. S. Quigley , A. N. Bogdanov , U. K. Rößler , T. L. Monchesky

We study the effect of surface-induced Dzyaloshinskii-Moriya interaction (DMI) on the ferromagnetic resonance (FMR) spectrum of thickness-modulated one-dimensional magnonic crystals and isolated stripes. The DMI is found to substantially…

Mesoscale and Nanoscale Physics · Physics 2017-03-14 M. Mruczkiewicz , M. Krawczyk

The competition between the ferromagnetic exchange interaction and anti-symmetric Dzyaloshinskii-Moriya interaction can stabilize a helical phase or support the formation of skyrmions. In thin films of chiral magnets, the current density…

Mesoscale and Nanoscale Physics · Physics 2020-11-11 Jan Masell , Xiuzhen Yu , Naoya Kanazawa , Yoshinori Tokura , Naoto Nagaosa

Magnetic skyrmions in chiral-lattice ferromagnets are currently attracting enormous research interest because of their potential applications in spintronic devices. However, they emerge in bulk specimens only in a narrow window of…

Mesoscale and Nanoscale Physics · Physics 2020-03-17 Kohei Tanaka , Ryosuke Sugawara , Masahito Mochizuki

The recent discovery of tunable Dzyaloshinskii-Moriya interactions in layered magnetic materials with perpendicular magnetic anisotropy makes them promising candidates for stabilization and manipulation of skyrmions at elevated…

Mesoscale and Nanoscale Physics · Physics 2015-12-17 Rick Keesman , A. O. Leonov , P. van Dieten , Stefan Buhrandt , G. T. Barkema , Lars Fritz , R. A. Duine

Magnetic skyrmion crystals are topological magnetic textures arising in the chiral ferromagnetic materials with Dzyaloshinskii-Moriya interaction. The magnetostatic fields generated by magnetic skyrmion crystals are first studied by…

Mesoscale and Nanoscale Physics · Physics 2018-06-21 Ren Qin , Yong Wang

Spectroscopic modes provide the most sensitive probe of the very weak interactions responsible for the properties of the long-wavelength cycloid in the multiferroic phase of \BF below $\TN \approx 640$ K. Three of the four modes measured by…

Materials Science · Physics 2015-06-15 Randy S. Fishman , Jason T. Haraldsen , Nobuo Furukawa , Shin Miyahara

Chiral skyrmion states exist in non - centrosymmetric magnetic crystals as a consequence of the asymmetric exchange Dzyaloshinskii-Moriya interactions that destroy the homogeneous magnetic state and generally lead to twisted incommensurate…

Mesoscale and Nanoscale Physics · Physics 2014-06-10 A. O. Leonov

We theoretically show that moderate interaction between electrons confined to move in a plane and localized magnetic moments leads to formation of a noncoplanar magnetic state. The state is similar to the skyrmion crystal recently observed…

Mesoscale and Nanoscale Physics · Physics 2015-03-19 D. Solenov , D. Mozyrsky , I. Martin

We study in this paper effects of Dzyaloshinskii-Moriya (DM) magnetoelectric coupling between ferroelectric and magnetic layers in a superlattice formed by alternate magnetic and ferroelectric films.Magnetic films are films of simple cubic…

Strongly Correlated Electrons · Physics 2019-06-19 Ildus F. Sharafullin , M. Kh. Kharrasov , Hung The Diep

Interfacial Dzyaloshinskii-Moriya interaction (DMI) is experimentally investigated in Pt/Co/Pt multilayer films under strain. A strong variation (from 0.1 to 0.8 mJ/m$^2$) of the DMI constant is demonstrated at $\pm 0.1\%$ in-plane uniaxial…

Materials Science · Physics 2020-04-22 N. S. Gusev , A. V. Sadovnikov , S. A. Nikitov , M. V. Sapozhnikov , O. G. Udalov

The revisited theoretical phase diagrams for thin films of cubic helimagnets with the easy-plane anisotropy are shown to have different topology as previously reported [Phys. Rev. B 85, 094429 (2012)]. For both in-plane and out-of-plane…

Mesoscale and Nanoscale Physics · Physics 2020-11-12 Andrey O. Leonov , Ivan M. Tambovtcev , Igor S. Lobanov , Valery M. Uzdin