TY - JOUR
T1 - Soft Magnetic Properties of Ni-Fe-Nb Alloy Films with Nearly 50 wt% Ni Concentration
AU - Takahashi, Migaku
AU - Uwazumi, H.
AU - Shimatsu, T.
AU - Sato, T.
AU - Takahashi, Minoru
AU - Wakiyama, T.
PY - 1991/2
Y1 - 1991/2
N2 - The relation between soft magnetic properties and local anisotropy fluctuation, which is strongly connected with the film micro structure, was systematically examined for Ni-Fe-Nb alloy films with nearly 50 wt% Ni. According to the micromagnetic ripple theory of Hoffmann, the effective magnetic anisotropy Ueff in each of the grains decreases drastically with increases in the number of grains N within the coupling volume. Experimental results showed that the local anisotropy fluctuation in Ni-Fe-Nb alloy films depends heavily on Ueff/Ku, and decreases with decreasing Ueff/Ku. Therefore, to realize high initial permeability in such films, it is necessary to increase N within the coupling volume by decreasing the grain size. In the cae of Ni-Fe-Nb alloy films, the grain size must be decreased to less than 200 Å in order to obtain a high initial permeability more than 2000.
AB - The relation between soft magnetic properties and local anisotropy fluctuation, which is strongly connected with the film micro structure, was systematically examined for Ni-Fe-Nb alloy films with nearly 50 wt% Ni. According to the micromagnetic ripple theory of Hoffmann, the effective magnetic anisotropy Ueff in each of the grains decreases drastically with increases in the number of grains N within the coupling volume. Experimental results showed that the local anisotropy fluctuation in Ni-Fe-Nb alloy films depends heavily on Ueff/Ku, and decreases with decreasing Ueff/Ku. Therefore, to realize high initial permeability in such films, it is necessary to increase N within the coupling volume by decreasing the grain size. In the cae of Ni-Fe-Nb alloy films, the grain size must be decreased to less than 200 Å in order to obtain a high initial permeability more than 2000.
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U2 - 10.1109/TJMJ.1991.4565120
DO - 10.1109/TJMJ.1991.4565120
M3 - Article
AN - SCOPUS:0026108508
VL - 6
SP - 112
EP - 119
JO - IEEE translation journal on magnetics in Japan
JF - IEEE translation journal on magnetics in Japan
SN - 0882-4959
IS - 2
ER -