A write element for a magnetoresistive ("MR") head or a giant magnetoresistive
(GMR) head includes a yoke and a coil. The coil made of a microstrip transmission
line. The coil is a single turn and is U-shaped. The yoke of the write element
includes laminated bottom pole, and top pole which are made of thin layers of ferromagnetic
material antiferromagnetically exchange coupled to each other through a very thin
nonmagnetic metallic layer. The yoke is made of metallic superlattices exhibiting
strong antiferromagnetic exchange coupling between ferromagnetic layers through
thin nonmagnetic metallic layers. The coil and the yoke are intertwined to provide
two or more flux interactions between them. The yoke has a symmetrical structure
with three interconnect vias, thereby reducing the effective magnetic length of
the yoke. The antiferromagnetically exchange-coupled yoke has a stable single domain
structure that exhibits very high switching time and does not suffer from hysteresis losses.