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A semiclassical theory for the orbital magnetization due to adiabatic evolutions of Bloch electronic states is proposed. It renders a unified theory for the periodic-evolution pumped orbital magnetization and the orbital magnetoelectric…

Mesoscale and Nanoscale Physics · Physics 2021-03-24 Cong Xiao , Yafei Ren , Bangguo Xiong

Magnetization can be induced by an electric field in systems without inversion symmetry $\mathcal{P}$ and time-reversal symmetry $\mathcal{T}$. This phenomenon is called the magnetoelectric (ME) effect. The spin ME effect has been actively…

Materials Science · Physics 2023-03-15 Koki Shinada , Akira Kofuji , Robert Peters

Insulating antiferromagnets are anticipated as the main protagonists of ultrafast spintronics, with their intrinsic terahertz dynamics and their abililty to transport spin information over long distances. However, direct transfer of spin…

We report intrinsic ferromagnetism in monolayer electrides or electrenes, in which excess electrons act as anions. Our first-principles calculations demonstrate that magnetism in such electron-rich two-dimensional (2D) materials originates…

Computational Physics · Physics 2020-11-25 Jun Zhou , Yuan Ping Feng , Lei Shen

The relative contribution of spin pumping and spin rectification from the ferromagnetic resonance of CoFeB/non-magnetic bilayers was investigated as a function of non-magnetic electrode resistance. Samples with highly resistive electrodes…

Materials Science · Physics 2015-06-19 Dong-Jun Kim , Sang-Il Kim , Seung-Young Park , Kyeong-Dong Lee , Byong-Guk Park

We theoretically investigate the orbital effects of an in-plane magnetic field on the spectrum of a quantum dot embedded in a two-dimensional electron gas (2DEG). We derive an effective two-dimensional Hamiltonian where these effects enter…

Mesoscale and Nanoscale Physics · Physics 2019-02-27 Peter Stano , Chen-Hsuan Hsu , Leon Camenzind , Liuqi Yu , Dominik Zumbühl , Daniel Loss

We predict from first principles an entirely topological orbital magnetization in the noncoplanar bulk antiferromagnet $\gamma$-FeMn originating in the nontrivial topology of the underlying spin structure, without any reference to…

Materials Science · Physics 2017-01-23 Jan-Philipp Hanke , Frank Freimuth , Stefan Blügel , Yuriy Mokrousov

Type-II multiferroics, where spin order induces ferroelectricity, exhibit strong magnetoelectric coupling. However, for the typical 2D type-II multiferroic NiI$_2$, the underlying magnetoelectric mechanism remains unclear. Here, applying…

The out-of-plane antidamping-like orbital torque fosters great hope for high-efficiency spintronic devices. Here we report experimentally the observation of out-of-plane antidamping-like torque that could be generated by z-polarized orbital…

Mesoscale and Nanoscale Physics · Physics 2023-11-13 Zeyang Gong , Fu Liu , Xinhong Guo , Changjun Jiang

Understanding the mechanism driving magnetization switching in spin-orbit-torque-assisted devices remains a subject of debate. While originally attributed to the spin Hall effect and spin Rashba-Edelstein effect, recent discoveries related…

The inverse orbital Hall effect (IOHE) has recently attracted considerable attention as an emerging mechanism for terahertz (THz) emission based on ultrafast angular-momentum-to-charge conversion. Most experimental studies have focused on…

We study the role of diamagnetic effects on the transport properties of metallic magnetic multilayers to elucidate whether they can explain the Giant Magnetoresistance (GMR) effect observed in those systems. Realistic Fermi surface…

Materials Science · Physics 2007-05-23 W. Tavera , G. G. Cabrera

Transition metal dichalcogenides (TMDs) are promising materials for efficient generation of current-induced spin-orbit torques on an adjacent ferromagnetic layer. Numerous effects, both interfacial and bulk, have been put forward to explain…

Recent results in electric-field control of magnetism have paved the way for the design of alternative magnetic and spintronic devices with enhanced functionalities and low power consumption. Among the diversity of reported magnetoelectric…

The recently predicted mechanism of orbital pumping enables the generation of pure orbital current from a precessing ferromagnet (FM) without the need for electrical current injection. This orbital current can be efficiently injected into…

Recent experiments have revealed nonlinear features of the magnetoresistance in metallic bilayers consisting of a heavy-metal (HM) and a ferromagnetic metal (FM). A small change in the lon- gitudinal resistance of the bilayer has been…

Mesoscale and Nanoscale Physics · Physics 2016-10-20 Steven S. -L. Zhang , Giovanni Vignale

Magnetotransport in arrays of monodisperse magnetite nanoparticles has been studied as a function of annealing temperatures. Charge transport mechanisms change from thermally assisted interparticle tunneling to hopping between Fe-sites…

Mesoscale and Nanoscale Physics · Physics 2021-10-12 Seongjin Jang , Wenjie Kong , Hao Zeng

Spintronics uses spins, the intrinsic angular momentum of electrons, as an alternative for the electron charge. Its long-term goal is in the development of beyond-Moore low dissipation technology devices. Recent progress demonstrated the…

Mesoscale and Nanoscale Physics · Physics 2018-09-14 R. Lebrun , A. Ross , S. A. Bender , A. Qaiumzadeh , L. Baldrati , J. Cramer , A. Brataas , R. A. Duine , M. Kläui

Superconducting magnetoelectric effect, which is the current-induced magnetization in a superconductor, mainly focused on the spin magnetization in previous studies, but ignore the effect of the orbital magnetic moments carried by the…

Mesoscale and Nanoscale Physics · Physics 2021-07-14 Wen-Yu He , K. T. Law

The influence of magnetostriction on static fluctuations of the magnetic moment in ferromagnetic polycrystals has been theoretically studied. Conditions have been found under which magnetoelastic interaction leads to stabilization of…

Mesoscale and Nanoscale Physics · Physics 2024-05-10 A. A. Fraerman