The exchange-coupled SmTbCo dual-layer media was prepared by an r. f magnetron sputtering system and the magnetic properties were investigated. The prepared SmTbCo dual layer is composed of 340 emu/cm^3 TM-rich readout layer and 5.80 kOe RE-rich memory layer, meeting the requirements of high saturation magnetization and large coercivity for hybrid recording, Through exchange coupling, the coercivity of the high Ms SmTbCo layer was greatly enhanced from 1.85 to 5.96 kOe. The reversal magnetization of the SmTbCo exchange-coupling d...
