DocumentCode
1198102
Title
Highly sensitive giant magnetoresistance in NiFe/(Ni/Fe/Cu)n /NiFe thin films
Author
Kouchiyama, Akira ; Miyauchi, Teiichi ; Watanabe, Kenjiro
Author_Institution
Corp. Res. Labs., Sony Corp., Tokyo, Japan
Volume
30
Issue
6
fYear
1994
fDate
11/1/1994 12:00:00 AM
Firstpage
3837
Lastpage
3839
Abstract
GMR of 0 to 6.95% has been found in fields of 0 to 50 Oe at room temperature in NiFe (5 nm)/[Ni(1.58 nm)/Fe(0.42 nm)/Cu(2.1 nm)]8 /NiFe(7 nm) thin films prepared by DC magnetron sputtering with extremely precise thickness control. The full width at half maximum (FWHM) of the GMR curve was 10.4 Oe. The top and bottom NiFe layers had antiferromagnetic coupling to adjacent Ni/Fe layers across the Cu layers and also maintained magnetically soft characteristics. The NiFe/(Ni/Fe/Cu)8/NiFe sensor which was 40 nm thick, 3.5 μm wide and 15 μm long showed a large output 4 times as large as NiFe/Al 2O3/NiFe sensors
Keywords
copper; electric sensing devices; giant magnetoresistance; iron; iron alloys; magnetic heads; magnetic multilayers; magnetic thin films; nickel; nickel alloys; soft magnetic materials; sputtered coatings; 0.42 to 7 nm; 40 nm; DC magnetron sputtering; NiFe-Ni-Fe-Cu-NiFe; NiFe/(Ni/Fe/Cu)8/NiFe sensor; NiFe/(Ni/Fe/Cu)n/NiFe thin films; antiferromagnetic coupling; magnetically soft characteristics; magnetoresistance; magnetoresistive sensor; Antiferromagnetic materials; Couplings; Giant magnetoresistance; Iron; Magnetic sensors; Sensor phenomena and characterization; Soft magnetic materials; Sputtering; Temperature sensors; Thickness control;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.333917
Filename
333917
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