ゲルマニウム中間層を用いた電着パーマロイ膜の結晶組織
1968 年 32 巻 8 号 p. 761-766
詳細
1968 年 32 巻 8 号 p. 761-766
Use of germanium coated substrates remarkably improves magnetic properties and the reproducibility of electrodeposited permalloy thin films used as high speed memories. Effective features of the germanium coated substrate (germanium/silver/glass) were examined in comparison with silver substrates (silver/glass and silver/germanium/silver/glass), using a B-H loop tracer, an electron microscope and an X-ray diffractometer. The results are as follows;
(1) The crystallite size of the electrodeposited permalloy thin film increases with increasing crystallite size of the substrate.
(2) Surface roughness of each substrate is of nearly the same order of magnitude.
(3) The magnetic properties of the permalloy film (with zero average magnetostriction and a thickness of 1000 Å) deteriorate with increasing crystallite size of the permalloy film.
(4) Consequently it is suggested that the advantage of germanium coated substrates arises from their amorphous structure.
