Coupled Electromagnetic–Thermal Modelling of Dynamic Performance for Modular SPM Machines
Energies, 2023 This paper presents coupled electromagnetic (EM)–thermal modelling of the steady-state dynamic performances, such as torque speed curve and the efficiency map, for surface-mounted permanent magnet machines.
Wei Zhang +4 more
doaj +1 more source
Direct observation of magnetization reversal of hot-deformed Nd-Fe-B magnet
AIP Advances, 2018 The dynamic magnetic domain structure in magnetization and demagnetization process of hot-deformed and NdCu-diffused Nd2Fe14B magnets were in-situ observed by Lorentz transmission electron microscopy (LTEM).
Xiaoyun Zhu +9 more
doaj +1 more source
Dynamic Landau-Lifshitz-Bloch-Slonczewski equations for spintronics [PDF]
AIP AdvancesThe atomistic Landau-Lifshitz-Gilbert equation is challenged when modeling spintronic devices where Joule heating is significant, due to its core assumption of a constant magnetization magnitude.
Pascal Thibaudeau +2 more
doaj +1 more source
A Modified Hybrid DC Circuit Breaker With Reduced Arc for Low Voltage DC Grids
IEEE Access, 2021 The increasing demand for the development and utilization of renewable energy resources has lead to a growing interest in the development of LVDC systems.
C. N. Muhammed Ajmal +4 more
doaj +1 more source
Dynamic demagnetization influence on the registration process of ultrasonic vibrations in pipes using an electromagnetic transducer [PDF]
, 2013 У роботі розглянуто особливості реєстрації ультразвукових хвиль у феромагнітних трубах перетворювачем електромагнітного типу. Враховано існування ефекту динамічного саморазмагничивания та його вплив на величину динамічної намагніченості феромагнітної ...
Karpus, V. V., Карпусь, В. В.
core +1 more source
Influence of the Demagnetizing Field in Spin Dynamics With a Perpendicular-to-Plane Polarizer
IEEE Transactions on Magnetics, 2008 The authors derive an analytical form of the critical current density for the gyromagnetic precession in spin-transfer torque (STT) devices. The STT device which is injected by a perpendicular-to-plane polarized current has very different properties. We find that the critical current needed to generate a large cone-angle precession motion depends on ...
null Jui-Hang Chang +1 more
openaire +1 more source
Role of internal demagnetizing field for the dynamics of a surface-modulated magnonic crystal [PDF]
Physical Review B, 2017 Magnonic crystals with locally alternating properties and specific periodicities exhibit interesting effects, such as a multitude of different spin-wave states and large band gaps. This work aims for demonstrating and understanding the key role of local demagnetizing fields in such systems. To achieve this, hybrid structures are investigated consisting
Langer, M. +11 more
openaire +2 more sources
Klipriviersberg Group demagnetization data
, 2020 The dataset contains demagnetization data and least squares analyses data for samples of the Klipriviersberg Group (as .sam and .lsq format)
Michiel de Kock (8263680)
core +2 more sources
A Miniaturized Autonomous Thermomagnetic Generator
Advanced Functional Materials, EarlyView.Micro, autonomous and high power thermomagnetic generator operating between a heat dissipator and a processor. ABSTRACT Thermomagnetic generators (TMG) are promising devices for converting low‐grade waste heat into electricity. Self‐actuation using permanent magnets is the key to autonomy.
Morgan Almanza +11 more
wiley +1 more source
Imaging Ultrafast Demagnetization Dynamics after a Spatially Localized Optical Excitation [PDF]
Physical Review Letters, 2014 Ultrashort, coherent x-ray pulses of a free-electron laser are used to holographically image the magnetization dynamics within a magnetic domain pattern after creation of a localized excitation via an optical standing wave. We observe a spatially confined reduction of the magnetization within a couple of hundred femtoseconds followed by its slower ...
von Korff Schmising, Clemens +12 more
openaire +3 more sources