Ordering enhancement of Cu underlayer on CoPt thin films

Effect of Pt underlayer on the coercivity of FePt sputtered film

“…Among the above, the performance for three of them [18][19][20] is similar to our previous data [16]. In this study, we select Pt as the underlayer material for the FePt hard magnetic film.…”

“…In our previous studies, we investigated the ordering enhancement of CoPt thin films by using Cu underlayer [16]. However, the enhancement mechanism is not yet clear.…”

Effect of Cu additive on the structure and magnetic properties of (CoPt)1−x Cu x films

“…Liao et al [16] used the quartz substrates, Yan et al [17] used the single crystal Si substrates, and Lim et al [15] used the CrRu underlayer and the Pt buffer layer. But in our samples, we just used very cheap amorphous glass substrates and did not use any underlayers and buffer layers.…”

“…The possible mechanism for the additive Cu in CoPt films is that Cu atoms may diffuse into the CoPt crystal grain and form CoCuPt triple alloys. It is the formation of the CoCuPt alloy that decreases the barrier transformation energy from disorder to order of CoPt [9,16]. Fig.…”

“…L1 0 CoPt films with Cu additive attracted significant attention recently. Some reports focused on the investigations of the effect of Cu on the ordering temperature and growth orientation [9,[13][14][15][16][17]. But the mechanism of the additive Cu in CoPt films is not clear so far.…”