A frequency-controlled magnetic vortex memory

作者：Pigeau B; de Loubens G^*; Klein O; Riegler A; Lochner F; Schmidt G; Molenkamp L W; Tiberkevich V S; Slavin A N

来源：Applied Physics Letters, 2010, 96(13): 132506.

DOI：10.1063/1.3373833

• antimony alloys
• magnetic cores
• magnetic force microscopy
• magnetic recording
• manganese alloys
• MRAM devices
• nanomagnetics
• nickel alloys
• vortices

Using the ultralow damping NiMnSb half-Heusler alloy patterned into vortex-state magnetic nanodots, we demonstrate a concept of nonvolatile memory controlled by the frequency. A perpendicular bias magnetic field is used to split the frequency of the vortex core gyrotropic rotation into two distinct frequencies, depending on the sign of the vortex core polarity p=+/- 1 inside the dot. A magnetic resonance force microscope and microwave pulses applied at one of these two resonant frequencies allow for local and deterministic addressing of binary information (core polarity).

• 出版日期2010-3-29
• 单位中国地震局