Structure and magnetostriction of Sm1−xPrxFe2 and Sm0.9Pr0.1(Fe1−yBy)2 alloys

Magnetostriction of TbxHo0.75−xPr0.25(Fe0.9B0.1)2 (x=0–0.3) compounds

“…The value of l s of Tb 0.15 Ho 0.6 Pr 0.25 (Fe 0.9 B 0.1 ) 2 compound is found to be 382 Â 10 À6 and is larger compared to that of Tb 0.15 Ho 0.85 Fe 2 (325 Â 10 À6 [4]). In spite of the suppression of the magnetostriction by boron [13,14], the presence of Pr is seen to contribute to an effective increase of magnetostriction. In order to determine the EMD in the Tb x Ho 0.75Àx Pr 0.25 (Fe 0.9 B 0.1 ) 2 compounds, XRD patterns were taken on the magnetically aligned powders of the above compounds employing Cu-Ka radiation and are shown in Fig.…”

Phase diagram of the Sm–Dy–Fe ternary system

“…Metallographic examination, X-ray diffraction analysis, and EPMA confirm the existence of five intermetallic phases: (Sm, Dy) Fe 2 , (Sm, Dy) Fe 3 , (Sm, Dy) 6 According to the metallographic examination and X-ray diffraction analysis, the as-cast (Sm 1-x Dy x )Fe 2 alloys consist of the majority of (Sm, Dy) Fe 2 phase with MgCu 2 -type cubic structure. The EPMA confirms that the (Sm, Dy) 2 Fe 17 , (Sm, Dy) Fe 3 , and rare earth-rich phases as small amounts exist in the as-cast (Sm 1-x Dy x )F e 2 alloys when x £ 0.5 (Fig.…”

“…The X-ray diffraction analysis, metallographic examination and EPMA ( 6 Fe 23 alloys become nearly a single (Sm, Dy) 6 Fe 23 phase (Fig. 3) in the range of 0.5 £ x £ 0.8 and it means that the (Sm, Dy) 2 Fe 17 phase is transformed into the (Sm, Dy) 6 Fe 23 phase during the homogenization treatment. When x>0.8, the homogenized (Sm 1-x Dy x ) 6 Fe 23 alloys consist of the matrix phase (Sm, Dy) 6 Fe 23 and a small amount of second phase (Sm, Dy) 2 Fe 17 .…”

“…For as-cast (Sm 1-x Dy x )F e 3 alloys, X-ray diffraction analysis shows that they consist of the The Dy 6 Fe 23 phase with the Th 6 Mn 23 -type structure is stable in the Dy -Fe system but Sm 6 Fe 23 does not exist in the Sm -Fe system [13]. The X-ray diffraction analysis, metallographic examination and EPMA ( 6 Fe 23 alloys become nearly a single (Sm, Dy) 6 Fe 23 phase (Fig. 3) in the range of 0.5 £ x £ 0.8 and it means that the (Sm, Dy) 2 Fe 17 phase is transformed into the (Sm, Dy) 6 Fe 23 phase during the homogenization treatment.…”

“…3) in the range of 0.5 £ x £ 0.8 and it means that the (Sm, Dy) 2 Fe 17 phase is transformed into the (Sm, Dy) 6 Fe 23 phase during the homogenization treatment. When x>0.8, the homogenized (Sm 1-x Dy x ) 6 Fe 23 alloys consist of the matrix phase (Sm, Dy) 6 Fe 23 and a small amount of second phase (Sm, Dy) 2 Fe 17 . References [21,22] have reported that the Dy 6 Fe 23 or (Dy,Tb,Pr) 6 (Fe,Al) 23 single phase can be obtained by homogenization treatment at temperatures near the melting point.…”