Abstract: A PCB that can transmit a high frequency signal of a GHz band with a low loss includes an insulator and magnetic nanoparticles dispersed in the insulator.

Abstract: The invention provides a perpendicular magnetic recording medium in which the recording density is greatly increased with little deviation of the crystal structure. A perpendicular magnetic recording medium has at least a soft magnetic under layer, an orientation control layer, a perpendicular magnetic layer, and a protective layer, which are formed on a nonmagnetic substrate, the orientation control layer consisting of a plurality of layers including a seed layer and an intermediate layer from the substrate side. Preferably, the seed layer and the intermediate layer each have a hexagonal close-packed (hcp) structure, and the average grain size of the seed layer is between 8 nm and 20 nm. The main component of the seed layer is preferably Mg, and the main component of the intermediate layer is preferably Ru.

Abstract: A magnetic recording medium having a high normalized coercive force of a ferromagnetic metal layer and excellent S/N ration and adaptable to high density recording. The magnetic recording medium comprises a substrate body and a Co-based ferromagnetic metal layer formed thereon via a metallic underlying layer. The oxygen concentrations in the metallic underlying layer and in the ferromagnetic metal layer are not larger that 100 wt ppm. Magnetic in version is used for the recording. The value of 4ΠMs/Hkgrain is the saturation magnetization of the ferromagnetic metal layer and Hkgrain is the anisotropic magnetic field of the individual crystalline particles constituting the ferromagnetic metal layer is 1 or less.

Abstract: A magnetic recording medium with a favorable S/N ratio, for which a high coercive force is possible, as well as a method of producing such a medium, and a magnetic recording device which utilizes such a medium. The magnetic recording medium includes a non-magnetic substrate, and a nucleation layer, a metal underlayer, and a ferromagnetic metal layer for recording magnetic information formed either directly or indirectly on top of the non-magnetic substrate, wherein the nucleation layer includes either an alloy incorporating at least Nb, or an alloy incorporating at least one element selected from the group consisting of V, Mo and W. Moreover, the nucleation layer should preferably also include at least one element selected from the group consisting of Ni, Co, Fe and Cu. The magnetic recording medium according to the present invention can be ideally applied to hard disks, floppy disks, and magnetic tapes and the like.