Imprinting of fine-scale magnetic patterns in electroplated hard magnetic films using magnetic foil masks
Abstract
This paper presents a batch-fabrication approach to imprint complex magnetic pole patterns (perpendicular north/south poles) into hard magnetic films using fine-scale, laser-machined iron foil “masks.” In this approach, pulsed magnetic fields varying between 0.1 and 1.0 T are used in conjunction with the field-concentrating effect of the iron foil masks to selectively reverse the magnetization of selected regions of 10-μm-thick Co80Pt20 films (Br = 1 T, Hci = 340 kA/m). Simple stripe array patterns are systematically studied both experimentally and via simulation, achieving patterned feature sizes (poles) down to 30 μm. Double exposures are also explored to create checkerboard patterns from simple stripe-like masks. Finally, masks with more complex patterns are used to demonstrate the viability of the approach to imprint arbitrary features.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 06, 2014
- Source ID
- 10.1063/1.4864145
Entities
People
- Alexandra Garraud
- David P Arnold
- Ololade D. Oniku
- Paul V. Ryiz
Organizations
- Defense Advanced Research Projects Agency
- University of Florida