Results 41 to 50 of about 4,766,046 (338)

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

Impact of Flux-Modulated Rotor Design on Special Flux Density Harmonics in PS-DSPM for Cogging Torque Minimization

Journal of Applied Science and Engineering
High cogging torque caused by a fluctuating magnetic flux distribution in the partitioned stator doubly salient permanent magnet machines (PS-DSPM), due to their double air gap design, limits their application despite excellent torque density ...
Wilaiphorn Nokklang, Pattasad Saengwong, Apirat Siritaratiwat, Warat Sriwannarat   +3 more
doaj   +1 more source

On type-I migration near opacity transitions. A generalized Lindblad torque formula for planetary population synthesis

, 2012
We give an expression for the Lindblad torque acting on a low-mass planet embedded in a protoplanetary disk that is valid even at locations where the surface density or temperature profile cannot be approximated by a power law, such as an opacity ...
C. Baruteau, C. Mordasini, C. Mordasini, C. Yang, F. Masset, F.S. Masset, F.S. Masset, F.S. Masset, F.S. Masset, F.S. Masset, Frédéric S. Masset, G. D’Angelo, H. Li, H. Tanaka, J. Casoli, K. Menou, K. Miyoshi, P. Artymowicz, P. Cassen, R.V.E. Lovelace, S. Ida, S. Ida, S. Paardekooper, S. Paardekooper, S.J. Paardekooper, S.J. Paardekooper, T. Henning, W. Lyra, W.R. Ward   +28 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

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

Type I Migration in Radiatively Efficient Discs

, 2010
We study Type I migration of a planet in a radiatively efficient disk using global two dimensional hydrodynamic simulations. The large positive corotation torque is exerted on a planet by an adiabatic disk at early times when the disk has the steep ...
Artymowicz, Ayliffe, Baruteau, Birnstiel, Casoli, de Val-Borro, Goldreich, Goldreich, Hartmann, Hayashi, Ida, Inaba, K. Yamada, Kitamura, Kley, Kley, Li, Li, Masset, Masset, Morohoshi, Muto, Paardekooper, Paardekooper, Paardekooper, Paardekooper, Paardekooper, Paardekooper, S. Inaba, Tanaka, Toro, Ward, Ward, Ward, Ward, Yu   +35 more
core   +1 more source

Anomalous domain wall velocity and Walker breakdown in hybrid systems with anisotropic exchange [PDF]

, 2013
It has recently been proposed that spin-transfer torques in magnetic systems with anisotropic exchange can be strongly enhanced, reducing the characteristic current density with up to four orders of magnitude compared to conventional setups. Motivated by
Enoksen, Henrik, Linder, Jacob, Sudbø, Asle   +2 more
core   +2 more sources

Analysis and Optimal Design of Hybrid Magnetic Circuit Reluctance Direct Drive Motor

IEEE Access
Reluctance direct-drive motors have become a hot research topic in recent years due to their high torque density, therefore, this paper proposes a novel hybrid magnetic circuit reluctance direct drive motor (HMRM) to meet the requirements of high torque ...
Fuqiang Wang, Baoquan Kou, Lu Zhang, Changchuang Huang   +3 more
doaj   +1 more source

Description of spin transport and precession in spin-orbit coupling systems and a general equation of continuity

, 2007
By generalizing the usual current density to a matrix with respect to spin variables, a general equation of continuity satisfied by the density matrix and current density matrix has been derived.
Chengshi Liu, E. I. Rahsba, E. I. Rahsba, E. I. Rashba, H. Haug, Hua-Tong Yang, L. P. Kadanoff, M. I. D’yakonov, M. I. D’yakonov, Y. Kato   +9 more
core   +1 more source

Optimal Magnetic Spring for Compliant Actuation—Validated Torque Density Benchmark [PDF]

Actuators, 2019
Magnetic springs are a fatigue-free alternative to mechanical springs that could enable compliant actuation concepts in highly dynamic industrial applications. The goals of this article are: (1) to develop and validate a methodology for the optimal design of a magnetic spring and (2) to benchmark the magnetic springs at the component level against ...
Mrak, Branimir, Lenaerts, Bert, Driesen, Walter, Desmet, Wim   +3 more
openaire   +3 more sources