Title :
Transition to superparamagnetism in a Cr-containing Finemet alloy
Author :
Franco, V. ; Conde, C.F. ; Conde, A. ; Kiss, L.F. ; Kemeny, T. ; Vincze, I.
Author_Institution :
Condensed Matter Phys. Dept., Sevilla Univ., Spain
Abstract :
Summary form only given. Soft magnetic nanocrystalline alloy microstructure consists of ferromagnetic crystals with grain sizes in the nanometer range, embedded in a ferromagnetic amorphous matrix. In order to extend the temperature range in which the transition to superparamagnetic behavior can be studied, Fe has been partially substituted by Cr in a Finemet-type alloy. This has the effect of separating the two limiting temperatures for detecting superparamagnetic behavior, the lower being the Curie temperature of the remaining amorphous matrix, and the upper the temperature at which further structural evolution of the nanocrystalline alloy takes place. Hysteresis loops have been measured from 100 K to 700 K.
Keywords :
Curie temperature; chromium alloys; ferromagnetic materials; grain size; iron alloys; magnetic hysteresis; nanostructured materials; soft magnetic materials; superparamagnetism; 100 to 700 K; Curie temperature; Fe-Cr Finemet-type alloy; embedded ferromagnetic nanograins; ferromagnetic amorphous matrix; hysteresis loops; microstructure; soft magnetic nanocrystalline alloy; superparamagnetic behavior; Amorphous magnetic materials; Amorphous materials; Chromium; Crystal microstructure; Grain size; Iron alloys; Magnetic separation; Matrices; Soft magnetic materials; Temperature distribution;
Conference_Titel :
Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International
Conference_Location :
Amsterdam, The Netherlands
Print_ISBN :
0-7803-7365-0
DOI :
10.1109/INTMAG.2002.1001412
