  A shapeable planar Hall sensor has been fabricated by lift-off a bilayer
structure of NiFe(10 nm)/IrMn (8 nm) grown on a Kapton/PDMS substrate without
using a buffer layer. The sensor exhibits a magnetic field sensitivity of 0.74
$\mu$V/Oe.mA and provides a stable response under repetitive ON/OFF
experiments. The concave and convex bending measurements indicate that the AMR
voltage of the sensor is very sensitive to the stress and strain. However, the
planar Hall sensitivity is independent from them with a stable linear region
and unchanged peak positions in the magnetic field axis. This type of behaviour
has been observed for the first time in the planar Hall sensors. Therefore,
this novel device can fulfill simultaneous multifunctional sensing of small
magnetic fields, stress and strain. This makes it promising for tactile sensing
applications in humanoid robotics.
