An anthracene derivative represented by general formula is provided. One end flange is for a vacuum vessel of the MRI system. The composites contain an organically modified clay and may also contain a compatibilizng agent, depending on the base resin used. In accordance with another alternative embodiment of the present invention, energy may be transferred across a substrate bounded on both sides by liquid with incidence of megasonic energy that is either normal to the substrate surface or within a critical range of incident angles. Since no storage data is inverted unless one -particle passes through two N-channel MOS transistors, a soft error hard to occur. The spacer layer comprises NiFeCr and is of such a thickness that magnetostatic coupling between the free layer and the bias layer across the spacer layer biases the magnetic moment of the free layer in a direction antiparallel to the magnetic moment of the bias layer.