Title :
A thermodynamic study of ESD and EOS induced pinned layer reversal in GMR sensors
Author :
Iben, Icko Eric Timothy
Author_Institution :
Tape Head Dev. Group, IBM Co, San Jose, CA, USA
fDate :
Aug. 30 2009-Sept. 4 2009
Abstract :
Most Giant Magnetoresistive GMR sensors use antiparallel (AP) pinned ferromagnets stabilized with Mn-based antiferromagnets (AFMs). We show that with IrMn and PtMn AFMs, the thermodynamics of the reversal of the pinned layer magnetic orientation following a reverse bias current is governed by an Arrhenius temperature dependence associated with the AP pinned ferromagnets rather than a Blocking, Neacuteel or Curie temperature.
Keywords :
antiferromagnetic materials; cobalt alloys; electrostatic discharge; ferromagnetic materials; giant magnetoresistance; iridium alloys; iron alloys; magnetic sensors; magnetoresistive devices; manganese alloys; platinum alloys; thermodynamics; Arrhenius temperature dependence; CoFe-IrMn; CoFe-PtMn; EOS; ESD; GMR sensors; antiferromagnets; antiparallel pinned ferromagnets; giant magnetoresistive sensors; pinned layer magnetic orientation; pinned layer reversal; reverse bias current; thermodynamics; Earth Observing System; Electrostatic discharge; Gas detectors; Giant magnetoresistance; Magnetic sensors; Magnetic shielding; Temperature dependence; Temperature sensors; Thermal sensors; Thermodynamics;
Conference_Titel :
EOS/ESD Symposium, 2009 31st
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-58537-176-1
Electronic_ISBN :
978-1-58537-176-1
