Title :
Spin-valve tape heads
Author :
Oliveira, Nuno J. ; Freitas, Paulo P.
Author_Institution :
INESC, Lisbon, Portugal
Abstract :
Shielded sensor-in-gap tape heads were fabricated and characterized, showing an output of 1.8 mVpp/μm at low density and 0.58 mVpp/μm at 100 KFCI. The operation of the spin-valve sensor is discussed and the performance of TbCo, NiO and MnRh exchange layers is compared, showing MR signals up to 6.5% and thermal stability above 250°C. Sensor-in-gap geometry is discussed and the wafer fabrication process is also described
Keywords :
cobalt alloys; copper; ferromagnetic materials; iron alloys; magnetic heads; magnetic shielding; manganese alloys; nickel alloys; rhodium alloys; spin valves; tantalum; terbium alloys; thermal stability; titanium alloys; tungsten alloys; 250 degC; MR signals; Ta-NiFe-Cu-CoFe-MnRh-TiW; Ta-NiFe-Cu-CoFe-NiO-TiW; Ta-NiFe-Cu-CoFe-TbCo-TiW; sensor-in-gap geometry; shielded sensor-in-gap tape heads; spin-valve tape heads; thermal stability; wafer fabrication process; Geometry; Magnetic flux; Magnetic heads; Magnetic materials; Magnetic recording; Magnetic sensors; Magnetization; Physics; Sensor phenomena and characterization; Soft magnetic materials;
Conference_Titel :
Electronics, Circuits and Systems, 1998 IEEE International Conference on
Conference_Location :
Lisboa
Print_ISBN :
0-7803-5008-1
DOI :
10.1109/ICECS.1998.813978
