Title :
Systematic study of the temperature dependence of the saturation magnetization in Fe, Fe-Ni and Co-based amorphous alloys
Author :
Liniers, M. ; Flores, J. ; Bermejo, F.J. ; Gonzales, J.M. ; Vicent, J.L. ; Tejada, J.
Author_Institution :
Dpto. Fisica de Mater., Univ. Complutense, Madrid, Spain
fDate :
9/1/1989 12:00:00 AM
Abstract :
Magnetization versus temperature in the temperature interval 2-200 K was measured for amorphous alloys of three different compositions: Fe 81.5B14.5Si4, Fe40Ni38 Mo4B18, and Co70Fe5Ni 2Mo3B5Si15. The measurements were performed by means of a SQUID (superconducting quantum interference device) magnetometer. The aim was to extract information about the different mechanisms contributing to thermal demagnetization. A powerful data analysis technique based on successive minimization procedures has demonstrated that Stoner excitations of the strong ferromagnetic type play a significant role in the Fe-Ni alloy studied. The Fe-rich and Co-rich alloys do not show a measurable contribution from single-particle excitations
Keywords :
boron alloys; cobalt alloys; ferromagnetic properties of substances; iron alloys; magnetic properties of amorphous substances; magnetisation; metallic glasses; molybdenum alloys; nickel alloys; silicon alloys; 2 to 200 K; Co70Fe5Ni2Mo3B5 Si15; Fe40Ni38Mo4B18; Fe81.5B14.5Si4; SQUID magnetometer; Stoner excitations; amorphous alloys; amorphous ribbons; ferromagnetism; saturation magnetization; single-particle excitations; successive minimization procedures; superconducting quantum interference device; temperature dependence; thermal demagnetization; Amorphous materials; Cobalt alloys; Iron alloys; Magnetization; Nickel alloys; Performance evaluation; SQUIDs; Silicon alloys; Superconducting devices; Temperature dependence;
Journal_Title :
Magnetics, IEEE Transactions on
