2012/10/22 by Masamitsu Hayashi, Yukiko K. Takahashi, Y. K. Takahashi +1
Materials Science · Physics and Astronomy · #Atomic physics #Condensed matter physics #Domain wall (magnetism) #Ferromagnetic resonance #Ferromagnetism #Field (mathematics) #Magnetic Properties and Synthesis of Ferrites #Magnetic field #Magnetic properties of thin films #Magnetization #Materials science #Microwave #Nanowire #Nuclear magnetic resonance #Nucleation #Optoelectronics #Permalloy #Physics #Resonance (particle physics) #ZnO doping and properties #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.4764053
published as Appl. Phys. Lett. 101, 172406 (2012)
openalex publication_date 2012/10/22 · arxiv created 2012/10/30 · arxiv updated 2015/06/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We have designed a system to study microwave assisted domain wall nucleation in permalloy nanowires. We find a substantial decrease in the nucleation field when microwave fields are applied, in comparison to pulse fields. A clear resonance peak is observed in the frequency dependence of the nucleation field, which coincides with the uniform mode ferromagnetic resonance frequency. Owing to the well-defined nucleation process, the switching field distribution is small in contrast to previous reports. Our results show that localized microwave field provides an efficient tool for injecting domain walls into magnetic nanowires.