Patent ID: 8446692

Claim:
A perpendicular magnetic recording (PMR) head comprised of a main pole layer that includes a yoke, flare portion, and write pole portion with a write pole tip at air bearing surface (ABS), said main pole layer consists of a laminated structure having a plurality of “n” ferromagnetic layers and “n−1” AFM-FM phase change material spacers arranged in an alternating manner and with planes that are oriented in a lengthwise direction perpendicular to the ABS, the laminated structure has a top surface and bottom surface that are essentially parallel to each other, and said AFM-FM phase change material spacers can be interchanged between antiferromagnetic (AFM) and ferromagnetic (FM) phases by application of thermal heating and cooling, and are in an AFM phase when the PMR recording head is in a non-writing mode and are in a FM phase during a data writing operation.