Origin of perpendicular magnetic anisotropy of SmCo5 thin films with Cu underlayer

Formation of SmFe5(0001) ordered alloy thin films on Cu(111) single-crystal underlayers

“…The increase of amorphous phase volume and the decrease of Fe (110) phase volume with increasing the layer thickness may be explained by considering the behavior of Cu atom diffusion from the underlayer into the Sm-Fe layer. Since the films are grown at elevated temperatures, the Sm-Fe films are expected to include Cu atoms diffused from the underlayer, and thus Sm(Fe,Cu) 5 ordered alloy layers are presumably formed, similar to the cases of Sm(Co,Cu) 5 ordered phase formation on Cu underlayers [3][4][5][6]. In the initial stage of Sm-Fe film growth on Cu underlayer, an Sm(Fe,Cu) 5 ordered phase is presumably formed through Cu atom diffusion and partial substitution of Fe sites in the SmFe 5 structure.…”

“…For magnetic recording media applications, high K u magnetic thin films with perpendicular magnetic anisotropy have been investigated. SmCo 5 polycrystalline [1][2][3][4] and SmCo 5 epitaxial [5][6][7] thin films with (0001) texture have been prepared by employing Cu(111) underlayers. Cu atom dissolution is known to stabilize the ordered phase formation through forming an alloy compound of Sm(Co,Cu) 5 [4,5,8].…”

“…SmCo 5 polycrystalline [1][2][3][4] and SmCo 5 epitaxial [5][6][7] thin films with (0001) texture have been prepared by employing Cu(111) underlayers. Cu atom dissolution is known to stabilize the ordered phase formation through forming an alloy compound of Sm(Co,Cu) 5 [4,5,8]. Recently, SmFe 5 ordered phase, which is metastable and does not appear in the Sm-Fe phase diagram, has been successfully prepared in the forms of film and powder samples [9][10][11].…”

Formation of Sm(Co1–xNix)5epitaxial thin films on Cu(111) underlayers

“…SmCo 5 polycrystalline [2][3][4][5][6][7] and epitaxial [8][9][10] films of (0001) orientation have been prepared on Cu [2][3][4][5]8,9], Cu/Ti [4,5], Ru/Cu/Ru [6], Ru [7,10], and Ru-Cr [7] underlayers. Most of the samples include a Cu underlayer.…”

Metastable Sm(Fe,Cu)5ordered alloy films formed on Cu(111) underlayers

“…SmCo 5 ordered alloy is a high K u material (1.1 × 10 8 erg/cm 3 ) with CuCu 5 -type crystal structure. SmCo 5 polycrystalline [1][2][3][4][5][6] and epitaxial [7][8][9] films with (0001) texture have been prepared by employing Cu [1-4, 8, 9], Cu/Ti [3,4], Ru/Cu/Ru [5], Ru [7], and RuCr [6] underlayers. Most of these films include Cu layers [1-5, 8, 9].…”