2008
DOI: 10.1063/1.3001801
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Magnetic properties and microstructure of FePt/Au multilayers with high perpendicular magnetocrystalline anisotropy

Abstract: FePt/Au multilayers were deposited on preheated 100 °C MgO (001) single crystal substrates by magnetron sputtering. Magnetic properties and microstructure of the films were studied. Results show that the film possesses high coercivity HC, excellent perpendicular magnetic anisotropy (PMA), and weak interparticle exchange coupling (IEC) after annealing. FePt and Au can grow epitaxially on MgO substrates along the [001] direction, leading to excellent PMA. Au atoms partly diffuse to the boundaries of FePt phases … Show more

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Cited by 73 publications
(24 citation statements)
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“…[6][7][8][9] To realize L1 0 ordering phase transition (LOPT) and obtain desired magnetic anisotropy, thin films samples have to go through thermal treatment, either by heating the substrate during deposition or performing post annealing. [10][11][12] These thermal treatments can cause undesirable grain growth, coarsening of interfaces, atomic inter-diffusion, or even structural destruction in thin films devices. 13,14 So, it is very desirable to introduce LOPT of L1 0 structured magnetic films with minimized thermal effects.…”
mentioning
confidence: 99%
See 1 more Smart Citation
“…[6][7][8][9] To realize L1 0 ordering phase transition (LOPT) and obtain desired magnetic anisotropy, thin films samples have to go through thermal treatment, either by heating the substrate during deposition or performing post annealing. [10][11][12] These thermal treatments can cause undesirable grain growth, coarsening of interfaces, atomic inter-diffusion, or even structural destruction in thin films devices. 13,14 So, it is very desirable to introduce LOPT of L1 0 structured magnetic films with minimized thermal effects.…”
mentioning
confidence: 99%
“…10 Here, the [FePt (1 nm)/Au(1 nm)] 10 multilayer films deposited on MgO(001) single crystal substrates are chosen for the current induced LOPT, magnetic and microstructure studies. Samples were prepared by magnetron sputtering with a base pressure of 5 Â 10 À5 Pa and the Ar working pressure was 0.45 Pa.…”
mentioning
confidence: 99%
“…Moreover, a higher ordering degree (S ¼ 0.76) was achieved, leading to the increase of the H C , which is strongly related to the ordering degree. 7 To summarize preceding results, FePt film's PMA and H C can be effectively controlled by introducing appropriate interfaces, the mechanism for which will be discussed in detail later.…”
Section: Resultsmentioning
confidence: 96%
“…However, the H C of some films remains high for affordability of a write head at present, which requires that the H C of a medium range from 160 to 400 kA/m. [5][6][7] This conceals the advantageous aspect of high magnetocrystalline anisotropy energy. On the other hand, the H C of the film can be effectively modified by doping with nonmagnetic atoms 8 or by embedding ordering FePt particles into nonmagnetic matrices.…”
mentioning
confidence: 97%
“…Hence, it is important to decrease the temperature in heat treatment of the FePt films. One of the methods to reach this purpose is to introduce the third element into the FePt film as an additional intermediate layer [6][7][8][9][10]. It can be assumed that the diffusion of doping element atoms and the stresses induced at the interface between the FePt film and intermediate doping layer in film composites promote the rearrangement of Fe and Pt atoms and the formation of an ordered L1 0 (FePt) phase with required magnetically hard properties.…”
Section: Introductionmentioning
confidence: 99%