Microstructure and magnetic properties of FePt film with combined MoC/(Mg–X)O (X=Cu, Ni, Co) intermediate layers

Magnetic Properties and Microstructure of FePt(BN, Ag, C) Films

“…The diffraction peak around 49.06° in Figure 1b is the convolution of the Bragg peaks of the (200) fcc (at 47.75°) and (002) L10 (at 49.27°) phases, whereas the in-plane anisotropy is due to the contribution of a disordered soft magnetic fcc phase [17]. According to previous works [13,14] and current results in Figure 3c, the FePt film deposited on the MoC layer always forms the big trapezoidal islands due to the excess carbon diffused up to separate part of the FePt grains, and each island contains many interacted FePt grains as observed in Figure 7c,d in Reference [14]. As a result, adding the (BN, Ag, C) segregants only had a minor effect on the worm-line separation of FePt grains, and a negative effect on the FePt ordering degree and grains size.…”

“…Due to the varied surface-and interface-energy, the FePt grains show a different morphology and contact angle on modified surfaces. The FePt(BN, C, Ag) film deposited on MgTiON (002)/CrRu (002) shows higher chemical ordering, higher (001) orientation and vertical contact angle of grains, as compared to our previous works which use 25-30 nm thick MoC (002) as the intermediate layer [13,14].…”

“…In Figure 3b, the ball-and square-like FePt grains range from 15 to 30 nm when observed. When the FePt film were deposited on the MoC layer with a thickness ranging from 3 to 25 nm [13,14], trapezoidal islands were always obtained as evidenced in Figure 3c.…”

Influence of an MgTiTaON Inserted Layer on Magnetic Properties and Microstructure of FePtAgC Films

“…The FePt gains are aggromolated and formed the large separated island which containes many FePt grains isolated by (Ag, C) in Figure 6(c-d). In our previous work [16][17][18], the FePt film deposited on the MoC layer always forms the big trapezoidal islands due to the excess carbon diffused up to separate part of the FePt grains and each island contains many interacted FePt grains observed in Figure 7(c-d) in reference [17]. During deposition at high temperature, the FePt grains were separated laterally by (Ag, C) due to high phase separation ability of carbon and MgTiTaON interlayer was used to maintain the epitaxial growth.…”

“…The 130 nm thick CrRu seed layer with (002) texture was deposited on the glass substrate at 325 • C and the 30 nm thick MgTiON intermediate layer with (002) texture was deposited subsequently on the CrRu seed layer. The (002) MgTiON/CrRu underlayer favors the heteroepitaxial growth of (001) L1 0 -FePt films [16][17][18]. The FePt film was interleaved with MgTiTaON and formed the FePt(t nm)/[MgTiTaON (1 nm)/FePt(4 nm)] 2 (t = 0, 2, 4, 6, 8, 10) multilayer (sample series (I)) which were deposited on (002) textured MgTiON/CrRu underlayer.…”