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Magnetoresistivity effects in association with the magnetic domain structure were studied by using 1 /spl mu/m wide epitaxial (10/spl middot/0) Co wires oriented parallel and perpendicular to the magnetic easy [001] axis. The parallel wire exhibited a large anisotropic magnetoresistivity ratio of /spl sim/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/spl times/10/sup -4/ /spl mu//spl Omega/cm at 5 K to 6.9/spl times/10/sup -4/ /spl mu//spl Omega/cm at 300 K.
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Kim et al. (1999) studied this question.
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