Non-conventional resonant behavior of an unconfined magnetic domain wall in a permalloy strip
Source abstract
Abstract
The resonant dynamic of a magnetic domain wall in a permalloy microstrip has been investigated using an innovative experimental setup that enables a simultaneous measurement of the ferromagnetic resonance and the magnetoresistance. The resonance frequency associated with the presence of the magnetic domain wall increases linearly with the external magnetic field in the range of fields where the domain wall is present in the microstrip. This linear behavior is unusual in a domain wall and not related to the standard resonant modes of a magnetic domain wall, such as breathing, twisting, or translational modes. The slope of this linear dependency is 1.38 GHz/mT, which is an incredibly large value and allows the detection of very small changes in the external magnetic field. This linear behavior opens a path for developing a highly tunable radio frequency oscillator or a magnetic sensing device where the presence of an external field is detected via small variations in the resonant frequency of the domain wall.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Magnetic properties of thin films · Characterization and Applications of Magnetic Nanoparticles · Electromagnetic Scattering and Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Instituto de Tecnologías Físicas y de la Información ITEFI-CSIC 1 , Madrid 28006, Spain
Max Planck Institute for Chemical Physics of Solids 2 , Dresden 01187, Germany
Instituto Madrileño de Estudios Avanzados–IMDEA Nanociencia 3 , C/Faraday 9, Madrid 28049, Spain
Instituto de Sistemas Optoelectrónicos y Microtecnología–Universidad Politécnica de Madrid (ISOM-UPM) 4 , Madrid 28040, Spain
Dpto. Física de Materiales, Universidad Complutense de Madrid 5 , Madrid 28040, Spain
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Show source-provided references
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