Microlaminated Ferromagnetic Composites for Magnetic Switching
Abstract
We have prepared samples of multilayer ferromagnetic composites by DC magnetron sputtering. Each sample consists of a large number of polycrystalline ferromagnetic layers interspersed with an equal number of insulating layers. The thickness of each ferromagnetic layer is chosen to be less then a skin depth in the VHF frequency range. Previous authors have predicted that such a structure should remain permeable to RF energy regardless of the total thickness since the laminated structure suppresses eddy current shielding and have verified the prediction for small signal levels. In the present work, we have experimentally measured the response of our samples to large amplitude pulsed and CW signals to determine whether this class of material can be used as a high performance substitute for metallic glass in magnetic switching applications. We have produced energy in the VHF range (40 - 400 MHz) by driving our samples with a 13.56 MHz sinusoidal H field in the easy axis direction.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1987
- Accession Number
- ADA638769
Entities
People
- John L. Wallace