Creation of nanoscale magnetic fields using nano-magnet arrays

We present the fabrication of nano-magnet arrays, comprised of two sets of interleaving SmCo5 and Co nano-magnets, and the subsequent development and implementation of a protocol to program the array to create a one-dimensional rotating magnetic field. We designed the array based on the microstructu...

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Bibliographic Details
Published inAIP advances Vol. 9; no. 7; pp. 075203 - 075203-5
Main Authors Sapkota, K. R., Eley, S., Bussmann, E., Harris, C. T., Maurer, L. N., Lu, T. M.
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 01.07.2019
AIP Publishing LLC
Subjects
Arrays
Coercivity
Magnetic fields
Magnetic materials
Magnetic properties
Magnetism
Magnets
Rotation
Samarium base alloys
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Summary:We present the fabrication of nano-magnet arrays, comprised of two sets of interleaving SmCo5 and Co nano-magnets, and the subsequent development and implementation of a protocol to program the array to create a one-dimensional rotating magnetic field. We designed the array based on the microstructural and magnetic properties of SmCo5 films annealed under different conditions, also presented here. Leveraging the extremely high contrast in coercivity between SmCo5 and Co, we applied a sequence of external magnetic fields to program the nano-magnet arrays into a configuration with alternating polarization, which based on simulations creates a rotating magnetic field in the vicinity of nano-magnets. Our proof-of-concept demonstration shows that complex, nanoscale magnetic fields can be synthesized through coercivity contrast of constituent magnetic materials and carefully designed sequences of programming magnetic fields.
Bibliography:USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
ISSN:2158-3226
2158-3226
DOI:10.1063/1.5098768