Formation of Sm(Co_1–xNi_x)₅epitaxial thin films on Cu(111) underlayers

Abstract

Abstract. Sm 17 (Co 1-x Ni x ) 83 (at. %, x = 0, 0.2, 0.8, 1) alloy thin films are prepared on Cu (111) 83 films with RT 5 structure consist of two types of epitaxial (0001) variant whose orientations are rotated around the film normal by 30° each other. With increasing the Ni content ratio of x from 0 to 1, the volume ratio of two variants is varied from 53:47 to 94:6. The nucleation of only one-type variant with a smaller lattice mismatch with respect to Cu underlayer is promoted with increasing the Ni content ratio.

Determination of Crystallographic Phase and Estimation of Order Degree for Rare Earth-Transition Metal Alloy Films with Hexagonal Structures

“…In the present paper, the experimental data of Sm17Co83 (at. %) epitaxial films with the c-axis parallel and perpendicular to the substrate surface which have been reported in our previous papers 9,10,17,19,21) (211) 500 ºC Fig. 1 RHEED patterns observed for Sm17Co83 films deposited on [(a), (b)] bcc-Cr(100) 9) , (c) bcc-Cr(211) 10) , (d) bcc-Fe65Co35(211) 10) , (e) fcc-Co(111)/fcc-Cu(111) 19) , and (f) fcc-Cu(111) 21) ].…”

“…SmCo5 [2][3][4][5][6][7][8][9][10] , PrCo5 11,12) , NdCo5 13,14) , YCo5 15) , GdCo5 15) , and SmNi5 9,16) epitaxial films with the c-axis lying in the film plane have been prepared on MgO(100) and MgO(110) single-crystal substrates by employing bcc-W, bcc-Cr, bcc-Fe, bcc-(Fe,Co), and hcp-Co underlayers, whereas SmCo5 [17][18][19][20][21] , NdCo5 22) , YCo5 23) , GdCo5 23) , SmFe5 [24][25][26] , and SmNi5 21,24,27) epitaxial films with the c-axis perpendicular to the substrate surface have been formed on MgO(111) and Al2O3(0001) substrates by using fcc-Cu and hcp-Ru underlayers. However, films deposited at low substrate temperatures tend to include amorphous phase.…”

“…However, films deposited at low substrate temperatures tend to include amorphous phase. 9,16,20,21,25,27) There is also a possibility that multiple hexagonal crystallographic phases such as R2T17 (R -89 at. % T), R2T7 (R -78 at.…”

Development of Media Nanostructure for Perpendicular Magnetic Recording

“…For application to PMR media, the Ku should be larger than the magneto-static energy (2πMs 2 ), thus a relation, Ku > 2πMs 2 , must be satisfied. The materials above the Ku = 2πMs 2 line shown in [130][131][132][133][134][135][136][137] or a Ru(0001) underlayer 138) .…”

“…Concerning the preparation and the characterization of other-type ordered alloy films of RT5, L11-CoPt, Bh-CoPt, and DO19-Co3Pt, they are reported in the references [130][131][132][133][134][135][136][137][138][139][162][163][164][165][166][167][168][169][170][171][172] .…”