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Giant Magnetoresistance Effect in Amorphous CoFeB Sandwiches

1995; Institute of Physics; Volume: 34; Issue: 1B Linguagem: Inglês

10.1143/jjap.34.l112

1347-4065

M. Jimbo, K. Komiyama, Hidekazu Matue, Shigeru Tsunashima, Susumu Uchiyama,

Magnetic Properties and Applications

The giant magnetoresistance effect has been investigated for amorphous-CoFeB/Cu/Co sandwiches with and without exchange-bias layers. A maximum magnetoresistance ratio of 5.4% was obtained in the CoFeB/Cu/Co sandwich at room temperature, where most of the MR change occurred within a magnetic field change of 280 A/m (3.5 Oe). The sandwich with NiO exchange-bias layer showed spin valve behavior with a MR ratio of 2.5%.