Room-temperature skyrmion phase in bulk Cu <sub>2</sub> OSeO <sub>3</sub> under high pressures
Liangzi Deng, Hung‐Cheng Wu, A. P. Litvinchuk, Noah F. Q. Yuan, Jey-Jau Lee, Rabin Dahal, H. Berger, Hung-Duen Yang, C. W. Chu
Abstract
Significance Skyrmion materials hold great promise for information technology due to the extremely low current needed to modify the spin configurations and the small size of magnetic domains. To facilitate their application, one great challenge is to break the magnetic field–temperature phase space restriction for the skyrmion state. We found that the temperature region for the skyrmion phase in bulk Cu 2 OSeO 3 can be greatly enhanced under physical pressure, making applications more practical by the use of strained heterostructures, for example. The observation of additional structures suggests that the skyrmion state may be insensitive to the underlying crystal structure. This work will stimulate research on finding skyrmion materials with different crystal structures and retaining the room-temperature skyrmion state at ambient condition.