A paper published by Japanese researchers at the University of Tokyo and Dowa Electronics in the Journal of the American Chemical Society and referenced in a recent issue of New Scientist reports on a paint formulation containing aluminum-iron oxide that can block electromagnetic waves up to 182 GHz at room temperature. Unlike earlier solutions for protecting high speed electronic communications such as shielded windows, rooms, or entire buildings constructed as virtual Faraday cages, this product offers a welcome, economical solution. Researchers noted that when the paint was used “the frequencies of the absorption peaks for x = 0.40, 0.30, 0.21, 0.09, 0.06, and 0 were observed at 112, 125, 145, 162, 172, and 182 GHz, respectively. These absorptions are due to the natural resonance achieved by the large magnetic anisotropies in this series. Such frequencies are the highest ones for magnetic materials. Because aluminum is the third most abundant atom, aluminum-substituted ε-iron oxide is very economical, and thus these materials are advantageous for industrial applications.” To read an synopsis of the paper, or to purchase the entire work, go to the American Chemical Society website. Need some insight into shielding solutions? Just post your query to the Interference Technology Shielding Forum.