Title :
Aging effects on microstructure and GMR in Au-Co and Au-Co-X (X=Cu,Ni,Fe) bulk alloys
Author :
Lee, C.G. ; Kim, S.H. ; Lee, D.H. ; Fukamichi, K.
Author_Institution :
Dept. of Metall. & Mater. Sci., Changwon Nat. Univ., South Korea
fDate :
9/1/1999 12:00:00 AM
Abstract :
Aging effects on the microstructure and the GMR in Au-Co and Au-Co-X (X=Fe,Ni,Cu) bulk granular alloys have been investigated. TEM observation shows that Co particles are of plate-like type and grow with the aging time. The optimum size for the maximum MR ratio is a length of about 10 nm and a thickness of 0.6 nm. In Au-Co-X (X=Cu,Ni,Fe) bulk alloys, it was confirmed that the maximum value of the MR ratio is about 3.5% at 10 kOe for Au80Co15Fe5 bulk alloy aged at 300°C for 1 hr
Keywords :
ageing; cobalt alloys; copper alloys; crystal microstructure; giant magnetoresistance; gold alloys; iron alloys; nickel alloys; transmission electron microscopy; Au-Co; AuCoCu; AuCoFe; AuCoNi; TEM; aging; giant magnetoresistance; granular alloys; microstructure; thickness; Aging; Cobalt alloys; Gold; Iron alloys; Magnetic field measurement; Magnetic separation; Materials science and technology; Microstructure; Nickel alloys; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
