Results 1 to 10 of about 184,078 (165)

Spin-Torque Generation in Topological-Insulator-Based Heterostructures [PDF]

, 2016
Heterostructures utilizing topological insulators exhibit a remarkable spin-torque efficiency. However, the exact origin of the strong torque, in particular whether it stems from the spin-momentum locking of the topological surface states or rather from ...
Fischer, Mark H, Kim, Eun-Ah, Manchon, Aurelien, Vaezi, Abolhassan   +3 more
core   +2 more sources

Spin-Transfer Torque Switching at Ultra Low Current Densities

MATERIALS TRANSACTIONS, 2015
The influence of the tantalum buffer layer on the magnetic anisotropy of perpendicular Co-Fe-B/MgO based magnetic tunnel junctions is studied using magneto-optical Kerr-spectroscopy. Samples without a tantalum buffer are found to exhibit no perpendicular magnetization.
Leutenantsmeyer, Johannes Christian, Zbarsky, Vladyslav, von der Ehe, Marvin, Wittrock, Steffen, Peretzki, Patrick, Schuhmann, Henning, Thomas, Andy, Rott, Karsten, Reiss, Günter, Kim, Tae Hee, Seibt, Michael, Muenzenberg, Markus   +11 more
openaire   +4 more sources

Three-dimensional Disk-Planet Torques in a Locally Isothermal Disk

, 2010
We determine an expression for the Type I planet migration torque involving a locally isothermal disk, with moderate turbulent viscosity (~0.0005 < alpha < ~0.05), based on three-dimensional nonlinear hydrodynamical simulations.
Baruteau, Casoli, D'Angelo, D'Angelo, Davis, Gennaro D'Angelo, Godon, Jang-Condell, Kley, Li, Lubow, Lynden-Bell, Masset, Masset, Matsumura, Menou, Ogilvie, Rafikov, Stephen H. Lubow, Tanaka, Ward, Yu   +21 more
core   +1 more source

Current Induced Fingering Instability in Magnetic Domain Walls [PDF]

, 2015
The shape instability of magnetic domain walls under current is investigated in a ferromagnetic (Ga,Mn)(As,P) film with perpendicular anisotropy. Domain wall motion is driven by the spin transfer torque mechanism.
A. Cebers, A. Cebers, A. Cebers, A. Hubert, A. Lemaître, A. P. Malozemoff, E. Guyon, J. Curiale, J. Gorchon, M. Plapp, N. Vernier, V. Jeudy   +11 more
core   +4 more sources

Non-equilibrium spin density and spin-orbit torque in three dimensional topological insulators - antiferromagnet heterostructure

, 2019
We study the behavior of non-equilibrium spin density and spin-orbit torque in a topological insulator - antiferromagnet heterostructure. Unlike ferromagnetic heterostructures where Dirac cone is gapped due to time-reversal symmetry breaking, here the ...
Ghosh, Sumit, Manchon, Aurelien
core   +1 more source

Proposal for a standard problem for micromagnetic simulations including spin-transfer torque [PDF]

, 2009
The spin-transfer torque between itinerant electrons and the magnetization in a ferromagnet is of fundamental interest for the applied physics community. To investigate the spin-transfer torque, powerful simulation tools are mandatory.
Antoine Vanhaverbeke, Benjamin Krüger, Bolte M. -A. B. W., Brown W. F., Daniela Pfannkuche, Dietmar P. F. Möller, Donahue M. J., Guido Meier, Hans Fangohr, Hopster H., Hubert A., Markus Bolte, Massoud Najafi, Matteo Franchin, Najafi M., Rolf Allenspach, Stellan Bohlens, Ulrich Merkt, Vladimirescu A.   +18 more
core   +1 more source

Limited Angle Torque Motors Having High Torque Density, Used in Accurate Drive Systems

Acta Polytechnica, 2011
A torque motor is a special electric motor that is able to develop the highest possible torque in a certain volume. A torque motor usually has a pancake configuration, and is directly jointed to a drive system (without a gear box). A limited angle torque motor is a torque motor that has no rotary electromagnetic field — in certain papers it is referred
R. Obreja, I. R. Edu
openaire   +3 more sources

High-Density 1R/1W Dual-Port Spin-Transfer Torque MRAM

Micromachines, 2022
Spin-transfer torque magnetic random-access memory (STT-MRAM) has several desirable features, such as non-volatility, high integration density, and near-zero leakage power. However, it is challenging to adopt STT-MRAM in a wide range of memory applications owing to the long write latency and a tradeoff between read stability and write ability.
Yeongkyo Seo, Kon-Woo Kwon
openaire   +3 more sources

Current driven magnetization dynamics in helical spin density waves

, 2006
A mechanism is proposed for manipulating the magnetic state of a helical spin density wave using a current. In this paper, we show that a current through a bulk system with a helical spin density wave induces a spin transfer torque, giving rise to a ...
Björn Skubic, C. Herring, J. Jensen, K. N. R. Taylor, L. M. Sandratskii, Lars Nordström, Ola Wessely, T. Miyazaki   +7 more
core   +1 more source

Maximum Torque Density Limit for Surface-Cooled SPM Machines [PDF]

2020 International Conference on Electrical Machines (ICEM), 2020
The aim of this work is to find the maximum torque density limit of a surface cooled SPM machine. In this paper, an analytical and a FEM-based model are developed under some theoretical conditions. Both models consist of a magnetic and a thermal part, where they are used to calculate the torque and the temperature distribution, respectively. Each model
Bocchese, Andrea, Nøland, Jonas Kristiansen, Bianchi, Nicola, Noddeland, Børge, Røkke, Astrid   +4 more
openaire   +2 more sources