Title :
Corrosion of particulate and thin film media
Author :
Speliotis, Denise E.
Author_Institution :
Adv. Dev. Corp., Burlington, MA, USA
fDate :
1/1/1990 12:00:00 AM
Abstract :
The stability of the magnetic parameters of several commercially available media was studied by measuring the bulk magnetic properties before and after exposure to different accelerated corrosion tests in environments of elevated temperature and humidity, and also in environments with traces of reactive species of Cl2, H2 S, and NO2. Large corrosion effects were found reflected in irreversible reduction in the saturation and remanent magnetization of the metal particle and some of the thin-film media. Considerable loss of magnetization was also observed in the CrO2 media under high-humidity conditions. The Co-modified iron oxide media experienced a considerable reduction in their coercivity. Only the gamma-iron oxide and the Ba-ferrite particulate media and a CoCrTa thin-film alloy with a high content of Cr were essentially stable
Keywords :
coercive force; corrosion testing; life testing; magnetic properties of fine particles; magnetic recording; magnetic thin films; magnetisation; remanence; BaFe12O19; Cl2; Co-Fe2O3; CoCrTa; CrO2 media; Fe2O3; H2S; NO2; accelerated corrosion tests; bulk magnetic properties; coercivity; corrosion effects; high humidity environment; high temperature environment; magnetic parameters stability; magnetic recording; particulate media; remanent magnetization; saturation magnetisation; thin film media; Corrosion; Humidity measurement; Life estimation; Magnetic losses; Magnetic properties; Saturation magnetization; Stability; Temperature; Testing; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
