Magnetic properties of oxide-coated iron nanoparticles synthesized by electrodeposition

Interface controlled electrical and magnetic properties in Fe–Fe3O4–silica gel nanocomposites

“…It should be noted that the magnitude of the loop shift is lower than that reported in the case of nanocomposites prepared by the electrodeposition method. 16 The Fe 3 O 4 layer in the present study was prepared by a controlled oxidation treatment at a fairly high temperature, whereas in the earlier study the layer formed at the ambient temperature due to the reactive nature of the ultrafine iron particles. Therefore in the present system the iron core diameters are quite small and the effect of spin glass order at the interface between ferro-and ferrimagnetic phases on the extent of loop shift has also been found to be small.…”

“…This has been found earlier also. 16 Figure 2͑a͒ shows the transmission electron micrograph for a specimen obtained by hot pressing the gel powder first reduced at 923 K for 1/2 h followed by an oxidation treatment at 573 K for 1/2 h. Figure 2͑b͒ is the corresponding electron diffraction pattern. In Table II the values of interplanar spacings estimated from the diffraction ring diameters are summarized and compared with standard ASTM data.…”

“…Such an increase is ascribed to the nanometer size of the iron particles. 16 In Fig. 8 is shown the variation of coercivity as a function of temperature for different specimens.…”

Crystal Structure of Fe-N Clusters Prepared by Plasma-Gas-Condensation

“…[1][2][3] Many kinds of metal nanoparticles have been fabricated by various techniques including colloidal chemistry method, 4,5) inert gas condensation, [6][7][8] laser deposition, 9) mechanical attrition, 10) and electrodeposition. 11) Besides the metal clusters, compound (nitride or oxide) clusters are also interesting because of their excellent oxidation-and corrosion-resistance in comparison with their pure metal clusters. In particular, Fe-nitrides are more attractive because some of them are of excellent magnetic properties, for example, high magnetic flux density of 00 -Fe 16 N 2 and 0 -Fe 4 N. There have been a few reports on the study of Fe-nitride particles in which 0 -Fe 4 N particles were prepared by heating acicular Fe particles in NH 3 -H 2 gas mixture 12,13) and by a reactive gas evaporation method in ammonia gas atmosphere.…”

Vas és ezüst nanorészecskék környezetbarát előállítása és alkalmazásának vizsgálata

“…Banerjee és munkatársai az elektrodepozíciós technika alkalmazásával szilikagéles mátrixban állítottak elő olyan α-vas nanorészecskéket, amelyek átmérője 4,9 és 11,1 nm között változott 130 . Az elektrondiffrakciós vizsgálatok azt mutatták, hogy a vasrészecskék …”