Title :
Spin valves with cobalt-ferrite pinning layers
Author :
Carey, M.J. ; Maat, S. ; Farrow, R. ; Marks, R. ; Nguyen, P. ; Rice, P. ; Kellock, A. ; Gurney, B.A.
Author_Institution :
IBM Almaden Res. Center, San Jose, CA, USA
Abstract :
Summary form only given. The authors present cobalt ferrite (CoFe/sub 2/O/sub 4/) as a pinning layer for spin valves. This is the first use of an insulating ferrimagnet in spin valve pinning. A minor R-H loop of a typical cobalt ferrite pinned spin valve, taken in /spl plusmn/2 kOe, is shown. The structure is: 400 /spl Aring/ CoFe/sub 2/O/sub 4//30 /spl Aring/ Co/25 /spl Aring/ Cu/5 /spl Aring/ Co/40 /spl Aring/ NiFe/30 /spl Aring/ Ru. High /spl Delta/R/R (>12%) is observed as are high sheet resistance and pinning fields of 25.5 Ohm/square and 1500 Oe, respectively.
Keywords :
cobalt compounds; coercive force; ferrites; magnetic heads; magnetic multilayers; spin valves; sputtered coatings; CoFe/sub 2/O/sub 4/-Co-Cu-Co-NiFe-Ru; CoFe/sub 2/O/sub 4//Co/Cu/Co/NiFe/Ru; ferrite pinning layer; magnetoresistive heads; minor R-H loop; pinning field; sheet resistance; spin valves; Anisotropic magnetoresistance; Annealing; Cobalt; Coercive force; Ferrites; Insulation; Magnetic anisotropy; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Spin valves;
Conference_Titel :
Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International
Conference_Location :
Amsterdam, The Netherlands
Print_ISBN :
0-7803-7365-0
DOI :
10.1109/INTMAG.2002.1000834
