| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1520623 | Materials Chemistry and Physics | 2016 | 15 Pages |
•The HEBM method is suitable for producing RT3 nanopowders based on Ho and Ni/Co.•As – milled powders are composed of nanoflakes with thickness dependent on milling time.•The decrease of crystallites size via pulverization is confirmed by XRD, TEM and AFM.•The prolonged milling is reflected in the non-linear variation of magnetic parameters.•HEBM results in the enhancement of coercivity and deformation of hysteresis loops.
The morphology and magnetic properties of bulk and ball – milled Ho(Ni0.5Co0.5)3 intermetallic compounds were studied. The presence of PuNi3 type of crystal phase was confirmed in crystalline as well as powdered samples. The emergence of a partly amorphous phase was confirmed at the end of pulverization. The applying of the high energy ball - milling (HEBM) method for various grinding time is reflected in the fabrication of nanostructured flakes with a thickness of less than 100 nm. The formation of agglomerates for the prolonged pulverization was demonstrated. The influence of the increased milling time for the final size of particles and crystallites was confirmed by a variety of complementary measurement methods. Furthermore, the enhanced coercivity (HC), non-linear dependence of remanence (MR) and emergence of MR/MS ratio higher than 0.5 driven by HEBM was evidenced. A quantitative analysis of XPS spectra indicates the formation of Ni/Co oxides on the nanoflakes surface, which was subsequently reduced over ion etching.
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