Abstract
Multilayer Ag/[Ag2Se(t)/FePt(1nm)]10 (thickness t = 0.1–0.4 nm) were alternately deposited on a glass substrate and subsequently annealed by rapid thermal process (RTP) at 800 °C for 3 min. After RTP, the interface between FePt and Ag2Se was intermixed to form particulate films. The grains size of the L10 FePt decreased from 9.8 to 7.7 nm when the total thickness of Ag2Se intermediate layer increases to 1 nm. The Ag/(Ag2Se/FePt)10 particulate film showed perpendicular magnetization and a slight increase in out-of-plane coercivity over that of the original thickness of Ag2Se. The Ag2Se atoms were immiscible with FePt phase but the FePt grains were refined and separated well from the Ag2Se phase. Compared with Ag/FePt bilayer, the grains of the FePt were refined and uniformly separated in the Ag/[Ag2Se(t)/FePt]10 multilayer with t = 0.1 nm.
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