CoPt nanoparticles by chemical reduction

Tailoring the morphology of CoxPt1−x magnetic nanostructures

“…The annealed nanomaterial displays a significantly higher magnetization (M s $31 emu/g compared to $10 emu/g for the 'as-prepared' S2), also explained by the partial structural transformation (revealed by XRD measurement) and the size increment that was caused by the post-stage thermal treatment. The M s value for S2 after annealing is in agreement with respective literature values, where also a dramatic increase is reported for the saturation magnetization of the post-stage heat treated CoPt nanoalloys [12,22]. Fig.…”

(Co,Fe)Pt nanoparticles by aqueous route; self-assembling, thermal and magnetic properties

“…The interparticle distance indicates negligible interpenetration of the alkyl chains (length 1.8 nm) of the OE molecules. No coalescence was observed for (Co,Pt)-based particles whichever synthesis method was used, at variance with observations [9] for CoPt particles prepared by another aqueous chemical route. The FePt particles prepared in aqueous or biphasic medium always appeared to have coalesced into sponge-like agglomerates.…”

“…Sun et al [7] also synthesized FePt nanoparticles by reduction of metallic salts by borohydride in organic medium. Since then, FePt [8] and CoPt [9] nanoparticles have also been obtained in aqueous/alcoholic mixture using NaBH 4 . Our attempts at synthesizing CoPt particles in aqueous medium using NaBH 4 led to contamination by boron (unpublished results).…”

Effects of Ag layers on the microstructure and magnetic properties of CoPt/BN multilayer films

“…Equiatomic CoPt alloys with the high magnetic anisotropy fct (001) structure have attracted attention due to their possible use as ultrahigh density recording media [1][2][3]. For data-storage applications, it is desirable that the magnetic easy axis orients either in the film plane or out-of the plane.…”