Nanocrystalline structure formation and magnetic hysteresis properties of Y-Fe-Co-B alloys

0355598 - FZÚ 2011 RIV RU eng J - Journal Article
Tereshina, I. S. - Tereshina, Evgeniya - Burkhanov, G.S. - Dobatkin, S.V.
Nanocrystalline structure formation and magnetic hysteresis properties of Y-Fe-Co-B alloys.
Reviews on Advanced Materials Science. Roč. 25, č. 1 (2010), s. 82-87. ISSN 1606-5131. E-ISSN 1605-8127.
[International Symposium on Bulk Nanostructures Materials /2./. Ufa, 22.09.2009-26.09.2009]
Institutional research plan: CEZ:AV0Z10100520
Keywords : R-Fe-B magnets * melt spinning * structure
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 0.649, year: 2010

In the present work a study of the influence of structural state on magnetic hysteresis properties of Y2(Fe1-xCox)14B compounds was carried out. Starting alloys were prepared by induction melting in an Ar atmosphere. Y-Fe-Co-B alloys with a nanograin structure were obtained by various techniques such as a severe plastic deformation (SPD) and by the classical melt spinning. Electron microscopy and X-ray analysis were used for the structural investigation. The magnetization measurements were performed using a SQUID magnetometer. It is shown that the relatively high values of coercive force are observed in such weakly-anisotropic alloys as Y2(Fe1-xCox)14B in case of achieved nano-grain structure. The effect of remanence enhancement is observed in rapidly quenched Y2Fe14B alloys at T = 4.2 K. The influence of hydrogen on magnetic hysteresis properties is studied as well.
Permanent Link: http://hdl.handle.net/11104/0194332