Method for preparing compact of resin compound having anisotropy

A method for preparing a compact of resin compound in which a filler having magnetic anisotropy is oriented in one direction, the method comprising the following steps (a) to (c):

• (a) a preparation step of mounting a sheet-shaped or block-shaped compact of resin compound including a resin composition, which contains a filler having magnetic anisotropy and is solidified by curing or being advanced to a B-stage by heat, light, or an electron beam, on a transportation unit which is movable in the horizontal direction, and covering at least a top surface of the compact of resin compound with a cover material having a thickness of less than 5 mm;
• (b) a step of applying a magnetic field to the compact of resin compound obtained in the step (a) with a bulk superconductor magnet having a central magnetic flux density of 1 T or more;
• and
• (c) a step of moving the compact of resin compound in the horizontal direction and scanning it while applying vibrations to the compact of resin compound mounted on a region of a central part of the bulk superconductor magnet under application of a magnetic field.