Title :
Magnetoresistivity of micron size (10·0) epitaxial Co wires
Author :
Kim, S.G. ; Otani, Y. ; Fukamichi, K. ; Yuasa, S. ; Nyvlt, M. ; Katayama, T.
Author_Institution :
Dept. of Mater. Sci., Tohoku Univ., Sendai, Japan
fDate :
9/1/1999 12:00:00 AM
Abstract :
Magnetoresistivity effects in association with the magnetic domain structure were studied by using 1 μm wide epitaxial (10·0) Co wires oriented parallel and perpendicular to the magnetic easy [001] axis. The parallel wire exhibited a large anisotropic magnetoresistivity ratio of ~11 % at 5 K, which turned to be negative above 214 K due to the temperature variable anisotropic magnetoresistivity effect. A negative domain wall contribution to the resistivity was observed only in the temperature range from 200 K to 220 K. On the contrary, the perpendicular wire exhibited a small positive wall contribution ranging from 3×10-4 μΩcm at 5 K to 6.9×10-4 μΩcm at 300 K
Keywords :
cobalt; ferromagnetic materials; magnetic domain walls; magnetic epitaxial layers; magnetoresistance; 5 to 300 K; Co; anisotropic magnetoresistivity ratio; epitaxial Co wires; magnetic domain structure; magnetoresistance; Conductivity; Electrons; Magnetic anisotropy; Magnetic domain walls; Magnetic domains; Magnetic field measurement; Magnetoresistance; Perpendicular magnetic anisotropy; Temperature; Wires;
Journal_Title :
Magnetics, IEEE Transactions on
