Title :
Study on magnetic instability of GMR heads using quasi static tester with laser heating function
Author :
Ohtsu, T. ; Kataoka, K. ; Morinaga, A. ; Natori, S.
Author_Institution :
Hitachi Global Storage Technol., Odawara, Japan
Abstract :
A QST (Quasi-Static Tester) with semiconductor laser heating was developed for GMR heads. We studied magnetic instability of GMR heads by using the QST and micro magnetic simulation. It was found that the heads with high domain-control-value in room temperature had also good stability in high temperature environment.
Keywords :
giant magnetoresistance; laser beam applications; magnetic heads; magnetoresistive devices; micromagnetics; test equipment; GMR heads; high domain-control-value; laser heating function; magnetic instability; micro magnetic simulation; quasi static tester; semiconductor laser heating; temperature 293 K to 298 K; Electrostatic discharge; Heating; Magnetic domains; Magnetic field measurement; Magnetic fields; Magnetic heads; Magnetic semiconductors; Semiconductor device testing; Semiconductor lasers; Space vector pulse width modulation;
Conference_Titel :
Electrical Overstress/Electrostatic Discharge Symposium, 2003. EOS/ESD '03.
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-5853-7057-3
Electronic_ISBN :
978-1-5853-7057-3
