Demagnetization

Following ultrafast magnetization dynamics in depth

Scientists at Max Born Institute create novel method to probe magnetic thin film systems, identifying heat injection from platinum layer as cause of magnetization changes. The approach allows femtosecond temporal and nanometer spatial resolution, paving way for studying ultrafast magnetism and device-relevant geometries.

SourceMax Born Institute for Nonlinear Optics and Short Pulse Spectroscopy (MBI)·JournalPhysical Review Research·TypeExperimental study·DateJun 22, 2022

Ultrafast magnetism: heating magnets, freezing time

The study reveals that the interaction between phonons and electrons is crucial for ultrafast demagnetization. The data show a temperature threshold below which this mechanism does not occur, indicating another microscopic mechanism at lower temperatures.

SourceHelmholtz-Zentrum Berlin für Materialien und Energie·JournalApplied Physics Letters·TypeExperimental study·DateOct 15, 2021

A new twist on a mesmerizing story

Researchers at ETH Zurich found that most angular momentum is transferred to the lattice during ultrafast demagnetization, twisting the sample as magnetization rapidly decreases. The discovery offers guidance for technological applications of ultrafast optical switching.

SourceETH Zurich Department of Physics·JournalNature·DateJan 14, 2019

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Demagnetization by rapid spin transport

Researchers find that hot electrons generated by laser pulses cause ultrafast demagnetization in nickel, not the light itself. The study suggests a new possibility for spintronics research.

SourceHelmholtz Association·JournalNature Materials·DateJan 27, 2013

Accolades for superior program leadership on groundbreaking superconducting degaussing technology

George Stimak, a program officer at ONR, has been recognized as Top Navy Scientist and Engineer of the Year for his work on high-temperature superconducting (HTS) materials-based ship degaussing systems. The HTS degaussing coil technology eliminates a ship's magnetic signature, making it safer for ships to operate closer to shore.

SourceOffice of Naval Research·DateMay 20, 2009

Office of Naval Research demonstrates revolutionary new counter-mine technology for ships

The US Navy has successfully demonstrated a revolutionary new counter-mine technology for ships, utilizing superconducting ceramic materials to neutralize the magnetic signature of the ship. This technology provides a warfighting advantage and can act like a cloaking device to eliminate the magnetic signature of the ship.

SourceOffice of Naval Research·DateApr 17, 2009

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