Demagnetization-borne microscale skyrmions
Physical Review B, 2012 Magnetic systems are an exciting realm of study that is being explored on smaller and smaller scales. One extremely interesting magnetic state that has gained momentum in recent years is the skyrmionic state. It is characterized by a vortex where the edge magnetic moments point opposite to the core.
Johnson, Patrick +3 more
openaire +4 more sources
Demagnetization of Cubic Gd-Ba-Cu-O Bulk Superconductor by Crossed-Fields: Measurements and Three-Dimensional Modeling [PDF]
, 2018 Superconducting bulks, acting as high-field permanent magnets, are promising for many applications. An important effect in bulk permanent magnets is crossed-field demagnetization, which can reduce the magnetic field in superconductors due to relatively ...
Milan Kapolka +5 more
core +4 more sources
Analytical Modeling and Analysis of Permanent-Magnet Motor with Demagnetization Fault
Sensors, 2022 Factors such as insufficient heat dissipation and excessively high temperature can easily lead to demagnetization of the PMs in permanent-magnet (PM) motors.
Cenwei Shi +3 more
doaj +1 more source
Detection of partial demagnetization fault in PMSMs operating under nonstationary conditions [PDF]
, 2016 Demagnetization fault detection of in-service permanent magnet synchronous machines (PMSMs) is a challenging task, because most PMSMs operate under nonstationary circumstances in industrial applications.
Blaabjerg, Frede +5 more
core +3 more sources
Disambiguation of Uniform Demagnetization Fault From Position Sensor Fault in FOC PMSM Applications
IEEE Access, 2022 Electrification of higher torque density applications in the transportation sector and robotics sector are primarily met with permanent magnet synchronous machines (PMSMs), attributing to their unique properties.
Sandun S. Kuruppu, Sunil G. Abeyratne
doaj +1 more source
Ab initio theory of electron-phonon mediated ultrafast spin relaxation of laser-excited hot electrons in transition-metal ferromagnets [PDF]
, 2013 We report a computational theoretical investigation of electron spin-flip scattering induced by the electron-phonon interaction in the transition-metal ferromagnets bcc Fe, fcc Co and fcc Ni.
Battiato, M. +3 more
core +3 more sources
Determination of the spin-flip time in ferromagnetic SrRuO3 from time-resolved Kerr measurements [PDF]
, 2010 We report time-resolved Kerr effect measurements of magnetization dynamics in ferromagnetic SrRuO3. We observe that the demagnetization time slows substantially at temperatures within 15K of the Curie temperature, which is ~ 150K.
Blok, J. L. +7 more
core +3 more sources
On-Line Detection of Demagnetization for Permanent Magnet Synchronous Motor via Flux Observer
Machines, 2022 Demagnetization in permanent magnet synchronous motor (PMSM), caused by high temperature or inverse magnetic field, may increase loss and torque ripple, and even degrade the system stability in severe cases.
Liqian Cao, Zhong Wu
doaj +1 more source
Nonlocal ultrafast demagnetization dynamics of Co/Pt multilayers by optical field enhancement [PDF]
, 2015 The influence on ultrafast demagnetization dynamics of metallic nano-structured gratings deposited on thin films of magnetic Co/Pt multilayers is investigated by the time-resolved optical Kerr effect.
Eisebitt, Stefan, +6 more
core +2 more sources
Fast Demagnetization and Vibration Reduction in Switched Reluctance Motor Drive System
IEEE Access, 2021 In this paper, a Switched Reluctance Motor (SRM) drive system is proposed to make a trade-off between torque profile and vibration amplitude. In the proposed drive system, the power factor correction and fast demagnetization are achieved using a single ...
Zahra Sadeghi +3 more
doaj +1 more source