Current perpendicular magnetoresistances of NiFeCo and NiFe “Permalloys”

Abstract

Measurements are presented of the 4.2 K current perpendicular specific resistances (area times resistance) and magnetoresistances of a series of Ni66Fe13Co21=Py′-based symmetric exchange-biased spin valves and Py′–Co hybrid spin valves. The behaviors of both kinds of Py′-based spin valves are similar to those for comparable Ni84Fe16=Py-based spin valves. The low temperature giant magnetoresistive parameters of Py′ must, thus, be similar to those for Py, suggesting that Py′ should be a viable alternative to Py for technological uses.