Title :
Characterization of high density spin valve recording heads by novel magnetic force microscope
Author :
Qian, C.X. ; Tong, H.C. ; Liu, F.H. ; Shi, X. ; Dey, S. ; Proksch, R.B. ; Nielson, P. ; Hachfeld, E.
Author_Institution :
Read-Rite Corp., Fremont, CA, USA
fDate :
9/1/1999 12:00:00 AM
Abstract :
High area density magnetic recording heads with giant-magnetoresistance (GMR) read sensors and focus-ion-beam (FIB) trimmed inductive writers were studied with a special magnetic force microscope (MFM). The MFM was equipped with a magnetoresistance sensitivity mapping (MSM) component that directly measures the magnetoresistance of the reader sensor as a function of position, and a High Frequency MFM (HFMFM) capability that maps 3D high frequency writing field distribution. Good agreement between the MSM measurement and the spin stand tests were obtained. MFM measurement offers unique high spatial resolutions not readily achievable with any other measurement techniques. It is the ideal tool for current and future high area density heads
Keywords :
focused ion beam technology; giant magnetoresistance; magnetic force microscopy; magnetic heads; spin valves; area density; focus ion beam trimmed inductive writer; giant magnetoresistance read sensor; high frequency MFM; magnetic force microscopy; magnetic recording; magnetoresistance sensitivity mapping; spatial resolution; spin valve head; Frequency; Giant magnetoresistance; Magnetic field measurement; Magnetic force microscopy; Magnetic forces; Magnetic heads; Magnetic recording; Magnetic sensors; Sensor phenomena and characterization; Spin valves;
Journal_Title :
Magnetics, IEEE Transactions on
