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Experimental Observation of Single Skyrmion Signatures in a Magnetic Tunnel Junction

Penthorn, N E ; Hao, X ; Wang, Z ; Huai, Y ; Jiang, H W

Physical review letters, 2019-06, Vol.122 (25), p.257201-257201, Article 257201 [Revista revisada por pares]

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Título:
Experimental Observation of Single Skyrmion Signatures in a Magnetic Tunnel Junction
Autor: Penthorn, N E ; Hao, X ; Wang, Z ; Huai, Y ; Jiang, H W
Materias: Hypothetical particles ; Magnetic resonance ; Nucleation ; Particle theory ; Texture ; Tunnel junctions
Es parte de: Physical review letters, 2019-06, Vol.122 (25), p.257201-257201, Article 257201
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descripción: We have deterministically created a stable topological spin texture in magnetic tunnel junctions (MTJ) by using pulsed or microwave currents. The spin texture is characterized by a field-dependent intermediate resistance state and a new magnetic resonance. Micromagnetic simulations show that the observations are consistent with the nucleation of a single skyrmion, facilitated by a spatially nonuniform stray field. The unique resonance spectrum is identified as the skyrmion breathing mode and a skyrmion diameter of 75 nm is estimated. This work shows the possibility to create skyrmions in MTJs without the Dzyaloshinskii-Moriya interaction and could lead to noninvasive, on-chip skyrmion measurement.
Editor: United States: American Physical Society
Idioma: Inglés

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