5 billion bits per square inch using Barium Ferrite
Zhang, "Complex permittivity, permeability, and microwave absorption of Barium ferrite
by citrate sol-gel process," Rare Metals, Vol.
The technology employs two types of super-fine magnetic particles, both tens of nanometers in scale: Acicular Ferromagnetic Alloy particle and Tabular Ferro-magnetic Hexagonal Barium Ferrite
With Ford's encoded card reading system that combines barium ferrite
, proximity, and bar code technologies, employees have access to any door their card authorizes them to use.
The HP 11974 series of preselected mm-wave mixers, shown in Figure 2, incorporate barium ferrite
tracking filters to give image-free signal analysis in the mm-wave frequency bands up to 75 GHz.
The Casi-Rusco card readers were more than ten years old and used barium ferrite
Among the new compounds under investigation are thin films of barium ferrite
and layered materials containing iron and silicon oxide.
Zhu is testing this concept on barium ferrite
, which he says has potential as the next-generation high-density recording medium.
technology that required students to insert them into a card