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Magnetization reversal of soft ferromagnetic Fe layer, coupled to [Co/Pt]ML multilayer [ML] with perpendicular magnetic anisotropy (PMA), has been studied in-situ with an aim to understand the origin of exchange bias (EB) in orthogonal…

We investigate the formation and dynamics of spin textures in antiferromagnetic insulators adjacent to a heavy-metal substrate with strong spin-orbit interactions. Exchange coupling to conduction electrons engenders an effective anisotropy,…

Mesoscale and Nanoscale Physics · Physics 2017-05-17 Ricardo Zarzuela , Yaroslav Tserkovnyak

Exchange anisotropy in ferromagnet/antiferromagnet (FM/AF) films is usually introduced along the cooling field or FM magnetization direction. Here we investigate the dependence of the exchange anisotropy, loop bifurcation, and reversal…

Materials Science · Physics 2007-05-23 Justin Olamit , Zhi-Pan Li , Ivan K. Schuller , Kai Liu

We consider mechanism of exchange coupling based on interaction between electrons in nonmagnetic layer. Depending on ratio of inverse time of diffusion of electrons between ferromagnetic layers and ferromagnetic splitting of conducting…

Mesoscale and Nanoscale Physics · Physics 2009-09-29 Zyuzin A. Yu

Combining strong magnetic anisotropy with strong exchange interaction is a long standing goal in the design of quantum magnets. The lanthanide complexes, while exhibiting a very strong ionic anisotropy, usually display a weak exchange…

Strongly Correlated Electrons · Physics 2016-04-19 Veacheslav Vieru , Naoya Iwahara , Liviu Ungur , Liviu F. Chibotaru

Electric field effects in ferromagnetic/oxide dielectric structures provide a new route to control domain wall (DW) dynamics with low power dissipation. However, electric field effects on DW velocities have only been observed so far in the…

We report on the exchange bias between antiferromagnetic and ferroelectric hexagonal YMnO3 epitaxial thin films sandwiched between a metallic electrode (Pt) and a soft ferromagnetic layer (Py). Anisotropic magnetoresistance measurements are…

Strongly Correlated Electrons · Physics 2009-11-13 V. Laukhin , X. Marti , V. Skumryev , D. Hrabovsky , F. Sanchez , M. V. Garcia-Cuenca , C. Ferrater , M. Varela , U. Luders , J. F. Bobo , J. Fontcuberta

The electric manipulation of antiferromagnets has become an area of great interest recently for zero-stray-field spintronic devices, and for their rich spin dynamics. Generally, the application of antiferromagnetic media for information…

Mesoscale and Nanoscale Physics · Physics 2017-05-24 Muftah Al-Mahdawi , Satya Prakash Pati , Yohei Shiokawa , Shujun Ye , Tomohiro Nozaki , Masashi Sahashi

More than 30 years ago, Malozemoff (Phys. Rev. B 35, 3679 (1987)) hypothesized that exchange interaction at the interface between a ferromagnet (F) and an antiferromagnet (AF) can act as an effective random field, which can profoundly…

Materials Science · Physics 2020-04-22 Guanxiong Chen , Dylan Collette , Sergei Urazhdin

We study the combined effects of spin transfer torque, voltage modulation of interlayer exchange coupling and magnetic anisotropy on the switching behavior of perpendicular magnetic tunnel junctions (p-MTJs). In asymmetric p-MTJs, a…

Materials Science · Physics 2020-02-19 D. J. P. de Sousa , P. M. Haney , D. L. Zhang , J. P. Wang , Tony Low

The effect of an exchange field on electrical transport in thin films of metallic ferromagnetic manganites has been investigated. The exchange field was induced both by direct exchange coupling in a ferromagnet/antiferromagnet multilayer…

Condensed Matter · Physics 2009-10-31 I. N. Krivorotov , K. R. Nikolaev , A. Yu. Dobin , A. M. Goldman , E. D. Dahlberg

We present a phenomenological theory of altermagnets, that captures their unique magnetization dynamics and allows modelling magnetic textures in this new magnetic phase. Focusing on the prototypical d-wave altermagnets, e.g. RuO$_2$, we…

Mesoscale and Nanoscale Physics · Physics 2024-07-30 O. Gomonay , V. P. Kravchuk , R. Jaeschke-Ubiergo , K. V. Yershov , T. Jungwirth , L. Šmejkal , J. van den Brink , J. Sinova

We investigate the exchange bias and training effects in the FM/AF heterostructures using a unified Monte Carlo dynamical approach. This real dynamical method has been proved reliable and effective in simulating dynamical magnetization of…

Mesoscale and Nanoscale Physics · Physics 2015-05-13 Kai-Cheng Zhang , Bang-Gui Liu

The ultrastrong coupling of (quasi-)particles has gained considerable attention due to its application potential and richness of the underlying physics. Coupling phenomena arising due to electromagnetic interactions are well explored. In…

It is well known that the kinetic exchange interaction between single-occupied magnetic orbitals (s-s) is always antiferromagnetic, while between single- and double-occupied orbitals (s-d) is always ferromagnetic and much weaker. Here we…

Materials Science · Physics 2016-04-22 Naoya Iwahara , Liviu F. Chibotaru

Studies of magnetization dynamics have incessantly facilitated the discovery of fundamentally novel physical phenomena, making steady headway in the development of magnetic and spintronics devices. The dynamics can be induced and detected…

Control of magnetic domain wall movement by the spin-polarized current looks promising for creation of a new generation of magnetic memory devices. A necessary condition for this is the domain wall shift by a low-density current. Here I…

Mesoscale and Nanoscale Physics · Physics 2014-03-11 Vladimir L. Korenev

We address the electronically induced anisotropy field acting on a spin moment comprised in a vibrating magnetic molecule located in the junction between ferromagnetic metals. Under weak coupling between the electrons and molecular…

Mesoscale and Nanoscale Physics · Physics 2018-06-20 J. D. Vasquez Jaramillo , H. Hammar , J. Fransson

Perpendicularly magnetized CoFeB layers with ultra-thin non-magnetic insertion layers are very widely used as the electrodes in magnetic tunnel junctions for spin transfer magnetic random access memory devices. Exchange interactions play a…

Mesoscale and Nanoscale Physics · Physics 2019-10-25 Jamileh Beik Mohammadi , Bartek Kardasz , Georg Wolf , Yizhang Chen , Mustafa Pinarbasi , Andrew D. Kent

We study low temperature properties in the metallic magnets, considering the itinerant electron mediated ferromagnetism. Applying the Monte Carlo simulations to the extended double exchange model, we discuss reorientation phase transition…

Strongly Correlated Electrons · Physics 2019-06-06 Y. Taguchi , J. Nasu , A. Koga , T. Yoshioka , H. Tsuchiura