Magnetic recording head having modules with opposing read elements and opposing periodic structures

A magnetic head comprising:

• a wafer having a grating directed along a first direction;
• a first module having a magneto-resistive (MR) element formed on a first portion of the wafer, the MR element of the first module having magnetic end regions, wherein magnetization of the magnetic end regions of the MR element of the first module is directed along a second direction opposite to the first direction, wherein the MR element of the first module is biased with a first bias current directed along a direction that is parallel or anti-parallel to the second direction such that desired magnetically stable operation of the MR element of the first module is obtained with one or the other or both of the directions;
• and
• a second module having a MR element formed on a second portion of the wafer, the MR element of the second module having magnetic end regions, wherein magnetization of the magnetic end regions of the MR element of the second module is directed along the first direction, wherein the MR element of the second module is biased with a second bias current directed along a direction that is the opposite of the first bias current direction in the first module.