title: Enhanced Stability of the Magnetic Skyrmion Lattice Phase under a Tilted Magnetic Field in a Two-Dimensional Chiral Magnet.
abstract: The magnetic skyrmion is a topologically stable vortex-like spin texture that offers great promise as information carriers for future spintronic devices. In a two-dimensional chiral magnet, it was generally considered that a tilted magnetic field is harmful to its formation and stability. Here we investigated the angular-dependent stability of magnetic skyrmions in FeGe nanosheets by using high-resolution Lorentz transmission electron microscopy (Lorentz TEM). Besides the theoretically predicted destruction of skyrmion lattice state by an oblique magnetic field as the temperature closes to its magnetic Curie temperature Tc∼ 278 K, we also observed an unexpected reentry-like phenomenon at the moderate temperatures near the border between conical and skyrmion phase, Tt∼ 240 K. This behavior is completely beyond the theoretical prediction in a conventional two-dimensional (2D) system. Instead, a three-dimensional (3D) model involving the competition between conical phase and skyrmions is likely to play a crucial role.
authors.affiliation: Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University , Shanghai 200438, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Wang
authors.affiliation: The Anhui Key Laboratory for Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of Chinese Academy of Science, Hefei 230031, Anhui Province, China.|Collaborative Innovation Center of Advanced Microstructures , Nanjing 210093, Jiangsu Province, China.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Du
authors.affiliation: Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University , Shanghai 200438, China.
authors.forename: Xuebing
authors.initials: X
authors.lastname: Zhao
authors.affiliation: The Anhui Key Laboratory for Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of Chinese Academy of Science, Hefei 230031, Anhui Province, China.|Collaborative Innovation Center of Advanced Microstructures , Nanjing 210093, Jiangsu Province, China.
authors.forename: Chiming
authors.initials: C
authors.lastname: Jin
authors.affiliation: The Anhui Key Laboratory for Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of Chinese Academy of Science, Hefei 230031, Anhui Province, China.|Collaborative Innovation Center of Advanced Microstructures , Nanjing 210093, Jiangsu Province, China.
authors.forename: Mingliang
authors.identifier: 0000-0002-0870-995X
authors.initials: M
authors.lastname: Tian
authors.affiliation: The Anhui Key Laboratory for Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of Chinese Academy of Science, Hefei 230031, Anhui Province, China.|Collaborative Innovation Center of Advanced Microstructures , Nanjing 210093, Jiangsu Province, China.
authors.forename: Yuheng
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University , Shanghai 200438, China.
authors.forename: Renchao
authors.initials: R
authors.lastname: Che
keywords: FeGe; Lorentz TEM; Skyrmion; stability