A magnetic tunnel junction sensor in which the free layer longitudinal biasing elements are coupled, without insulation, to the free layer outside of the MTJ stack to provide reliable non-shunting MTJ free layer stabilization without extremely thin dielectric layers. The TEG modules are group formed on the scribe line area. For protection purposes, the fiber is covered with a buffer made from a plastic or polymer. The syringe includes a plunger rod slidably received in the hollow interior of the tubular plunger. According to the modulator, the operational point may be controlled with improved efficiency and stability.