Researchers at University of California – Davis have developed a novel method to achieve artificial magnetic skyrmions at room temperature. The invention is suitable for exploration of magnetic skyrmions towards highly energy efficient magnetic information storage, such as high density magnetic recording, magnetic sensors, non-volatile magnetic memory and logic devices
The recently discovered magnetic skyrmions have sparked intense interest in condensed matter physics and materials science. The unique spin texture in magnetic skyrmions leads to a host of fascinating phenomena due to the topologically protected quantum state and emergent electromagnetic field, offering great potential for novel concepts in low dissipation magnetic information storage, or skyrmionics. To date, vast majority of the magnetic skyrmion phases have been limited to low temperatures and finite magnetic fields. However, for systematic studies of the unique properties and the technological exploitation of magnetic skyrmions it is critical to achieve them in the ground state at ambient conditions.
Researchers at the University of California have overcome these challenges and invented novel methods to achieve artificial skyrmion lattices with a stable ground state at room temperature. The approach involves proper choices of materials, structures, and surface modification via ion irradiation, as well as a suitable magnetic field sequence to achieve stable artificial magnetic skyrmion lattices at room temperature and in the absence of any magnetic field. These skyrmions offer a convenient and powerful platform to explore their physical properties. The invention also includes device concepts to utilize such artificial skyrmions towards low dissipation information storage and magnetic sensing
This invention has several key features which make it an excellent candidate for research and industrial uses:
The invention has a myriad of potential uses, including:
|United States Of America||Issued Patent||10,312,436||06/04/2019||2015-874|
magnetic memory, information storage, magnetic sensor, computer logic, skyrmion