Results 61 to 70 of about 11,992 (214)

Fundamental Understanding of Magnetic Reconnection via Spiral CT Scan. V. Ion Demagnetization, Electron Demagnetization, and Hall Effect

The Astrophysical Journal
For the first time, we reveal the distribution of ion demagnetization, electron demagnetization, and Hall effect around a reconnection X-line by using the spiral CT scan technique, which is a novel technique analogous to that in the hospital. This X-line
H. S. Fu, Z. Wang, J. B. Cao
doaj   +1 more source

Giant Anisotropic Spin Absorption in Chiral Hybrid Semiconductors

Advanced Materials, EarlyView.
Researchers uncover that chiral hybrid organic–inorganic semiconductors absorb spin differently depending on its polarization direction. This anisotropic spin absorption is primarily driven by the local symmetry breaking within the layered structure.
Cong Yang, Rui Sun, Mingwei Ge, Shehzad Khan, Subhrangsu Mukherjee, Matthew P. Hautzinger, Tianyou Lu, Harald Ade, Pius M. Theiler, Matthew C. Beard, Dali Sun, Mengxia Liu, Jun Liu   +12 more
wiley   +1 more source

Demagnetization experiments on frozen ferrofluids

, 2004
Michele O, Hesse J, Bremers H, et al. Demagnetization experiments on frozen ferrofluids. Phys. Stat. Sol. (c).
Jutzi, Peter, Hütten, Andreas, Bremers, Heiko, Sudfeld, Daniela, Ennen, Inga ; https://orcid.org/, Wojczykowski, Klaus, Michele, Oliver, Hesse, Jürgen, Reiss, Günter ; https://orcid.org/   +8 more
core   +1 more source

Research on Demagnetization Fault Diagnosis Method of Mine Cutting Permanent Magnet Synchronous Motor

International Journal of Rotating Machinery
To give timely and accurate diagnosis in the early stage of demagnetization failure for effective control and treatment, based on wavelet packet analysis, principal component analysis (PCA) dimensionality reduction, and least squares support vector ...
Guo Ye, Yanbin Lu, Jinyong Ju, Lianchao Sheng   +3 more
doaj   +1 more source

Demagnetization Fault Diagnosis in Axial Flux PMSMs for UAM Propulsion: An Experimental Study Across Multiple Operating Environments

IEEE Access
Axial flux permanent magnet synchronous motors are promising for urban air mobility propulsion because of their high-power density and compact structure.
Seunghwan Lee, Jingyu Noh, Jaewan Kim, Sanghyun Park, Sangjun Park, Jeonghoon Kang, Namsu Kim   +6 more
doaj   +1 more source

Synthesis of Bulk Superconducting LiNbO2 Crystals Through CaH2 Reduction

Advanced Materials, EarlyView.
CaH2 reduction reconstructively transforms insulating LiNbO3 single crystals into superconducting bulk LiNbO2 with a critical temperature of Tc = 14.4 K. Scanning electron microscopy reveals large‐volume, high‐yield phase conversion. Magnetization measurements demonstrate a robust ∼ 77% Meissner shielding fraction, establishing bulk superconductivity ...
Ryan Paxson, Stephanie J. Hong, Bicky S. Moirangthem, Parham Kabirifar, Saya Takeuchi, Tianyu Li, Chih‐Yu Lee, Haotong Liang, Keenan Avers, Kamal R. Joshi, Amlan Datta, Makariy A. Tanatar, Shanta Saha, Joseph A. Dura, Peter Zavalij, Johnpierre Paglione, Ruslan Prozorov, Alexander J. Grutter, Efrain E. Rodriguez, Ichiro Takeuchi   +19 more
wiley   +1 more source

Quantification of Magnetic Interactions in van der Waals Heterostructures Using Lorentz Transmission Electron Microscopy and Off‐Axis Electron Holography

Advanced Materials, EarlyView.
Cross‐sectional Lorentz TEM and off‐axis electron holography visualize the magnetic domain structure and quantify interlayer coupling in Fe3GeTe2/graphite/Fe3GeTe2 heterostructures. A stray‐field coupling length of 37±$\pm$7 nm marks the onset of domain misalignment between the layers.
Joachim Dahl Thomsen, Qianqian Lan, Nikolai S. Kiselev, Eva Duft, Arslan Rehmat, Zdeněk Sofer, Rafal E. Dunin‐Borkowski   +6 more
wiley   +1 more source

Critical aspects of demagnetization faults in direct drive permanent magnet generators for renewables

, 2022
Summarization: Demagnetization of permanent magnet machines is a fault that evolves over time leading to an eventual catastrophic failure. This condition is of particular interest in renewables, with emphasis on remote applications such as offshore wind,
Skarmoutsos Giorgos, Mueller Markus, Burchell Joseph, Γυφτακης Κωνσταντινος(http://users.isc.tuc.gr/~kgyftakis), Gyftakis Konstantinos(http://users.isc.tuc.gr/~kgyftakis), Barajas-Solano Ignacio   +5 more
core   +1 more source

Tuning ultrafast demagnetization dynamics in FePdPt ternary alloy films: the role of spin–orbit coupling

Results in Physics
The influence of spin–orbit coupling (SOC) on ultrafast demagnetization dynamics is still an obscure issue. Ferromagnetic ternary alloy film containing Platinum element has the advantage that SOC strength can be regulated flexibly by varying the ...
Zhifeng Chen, Shufa Li, Li Ma, Jielin Zhou, Zhikun Xie, Shiming Zhou, Tianshu Lai   +6 more
doaj   +1 more source

Mode Recognition and Fault Positioning of Permanent Magnet Demagnetization for PMSM

Energies, 2019
This paper proposes a demagnetization fault detection, mode recognition, magnetic pole positioning, and degree evaluation method for permanent magnet synchronous motors. First, the analytical model of the single-coil no-load back electromotive force (EMF)
Caixia Gao, Yanjie Nie, Jikai Si, Ziyi Fu, Haichao Feng   +4 more
doaj   +1 more source