PhysRevB.96.094422.pdf (2.15 MB)
Negative permeability in magnetostatics and its experimental demonstration
journal contribution
posted on 2023-06-09, 13:01 authored by Rosa Mach-Batlle, Albert Parra, Jordi Prat-Camps, Sergi Laut, Carles Navau, Alvaro SanchezThe control of magnetic fields, essential for our science and technology, is currently achieved by magnetic materials with positive permeability, including ferromagnetic, paramagnetic, and diamagnetic types. Here we introduce materials with negative static permeability as a new paradigm for manipulating magnetic fields. As a first step, we extend the solutions of Maxwell magnetostatic equations to include negative-permeability values. The understanding of these new solutions allow us to devise a negative-permeability material as a suitably tailored set of currents arranged in space, overcoming the fact that passive materials with negative permeability do no exist in magnetostatics. We confirm the theory by experimentally creating a spherical shell that emulates a negative-permeability material in a uniform magnetic field. Our results open new possibilities for creating and manipulating magnetic fields, which can be useful for practical applications.
History
Publication status
- Published
File Version
- Published version
Journal
Physical Review BISSN
2469-9950Publisher
American Physical SocietyExternal DOI
Issue
094422Volume
96Department affiliated with
- Informatics Publications
Full text available
- Yes
Peer reviewed?
- Yes