Title :
Magnetic properties of nanocomposites containing FeNi or Fe dispersed in a MnZn ferrite matrix
Author :
Moulin, Johan ; Champion, Yannick ; Varga, Lajos K. ; Mazaleyrat, Frederic
Author_Institution :
ENS Cachan, LESiR, Cachan, France
Abstract :
Summary form only given. Nanocomposites have been synthesised, by mixing in a planetary miller, of nanosized Fe/sub 25/Ni/sub 75/ or Fe and MnZn ferrite powders. Structural properties, grain size and lattice distortion were estimated by X-ray diffraction. Dispersion of the metallic particles was examined by TEM and SEM. Hysteresis loops were measured using a VSM. The powder preparation process increases the anisotropy constant of the ferrite component through the residual lattice distortion. The temperature dependence of magnetization was recorded by Faraday balance measurement, and well-defined Curie points are visible.
Keywords :
Curie temperature; X-ray diffraction; ferrites; grain size; iron; iron alloys; magnetic hysteresis; magnetisation; manganese compounds; nanocomposites; nickel alloys; powder technology; scanning electron microscopy; transmission electron microscopy; zinc compounds; Curie point; MnZn ferrite matrix; MnZnFeO-Fe; MnZnFeO-Fe/sub 25/Ni/sub 75/; SEM; TEM; X-ray diffraction; XRD; anisotropy constant; grain size; hysteresis loops; lattice distortion; magnetic properties; magnetization; metallic particles dispersion; nanocomposites; planetary milling; powder preparation process; temperature dependence; Distortion measurement; Extraterrestrial measurements; Ferrites; Grain size; Iron; Lattices; Magnetic properties; Nanocomposites; Powders; X-ray diffraction;
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.2002.1000895
