Inverted Near-Surface Hysteresis Loops in Heterogeneous (Nanocrystalline/Amorphous) Fe81Nb7B12 Alloys.

Autor: Shalyguina, E. E., hacek, I., hacek, P., Mel’nikov, V. A., Abrosimova, N. M.
Předmět:
Zdroj: Journal of Experimental & Theoretical Physics; Sep2004, Vol. 99 Issue 3, p544-551, 8p
Abstrakt: Inverted hysteresis loops were observed for the first time in the near-surface layers of heterogeneous (nanocrystalline/amorphous) Fe81Nb7B12 alloys. In particular, a negative residual magnetization is observed when a positive magnetic field applied in the sample plane is decreased to zero. The inverted hysteresis is qualitatively explained within the framework of a two-phase model, according to which the heterogeneous alloys contain two dissimilar phases exhibiting uniaxial magnetic anisotropy and featuring antiferromagnetic exchange interaction. © 2004 MAIK “Nauka / Interperiodica”. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index