1. Multilayer power inductor using sheets charged with soft magnetic metal powder

2. The plates (15) are made of a non-magnetic metal, preferably aluminum.

3. Plasma device including a powered non-magnetic metal member between a plasma ac excitation source and the plasma

4. The present invention relates to a selective adsorption of organic materials by using magnetic hybrid nanoparticles, and specifically, to: a magnetic oil adsorbent, wherein magnetic metal particles, and one or more materials selected from a carbon nanotube and polydimethylsiloxane (PDMS) are sequentially coated on the surface of silica nanoparticles; and a method for removing oil using the same.