An electronic device utilizes a method for displaying content on a display of the device during different device operating modes. This foaming additive may be utilized in foamed treatment fluids, and those foamed treatment fluids may be utilized in fracturing and sand control treatments in subterranean operations. For example, the first ferromagnetic layer may comprise a first pinned ferromagnetic layer, the second ferromagnetic layer may comprise a free ferromagnetic layer, and the first antiferromagnetic layer may comprise a free antiferromagnetic layer. A plurality of balls is adapted to be stacked upon the rods. Compensation is provided using negative feedback in the amplifier.