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Influence of dot size and annealing on the magnetic properties of large-area L10-FePt nanopatterns
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10.1063/1.3646550
/content/aip/journal/jap/110/7/10.1063/1.3646550
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/7/10.1063/1.3646550
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) AFM (a) and MFM (b) images of large-area L10-Fe51Pt49 nanodot patterns on MgO(100) annealed at 800 °C for 1 h after fabrication for different dot sizes (dot periodicity): (a), (b) 100 nm (200 nm), (c), (d) 80 nm (180 nm), (e), (f) 60 nm (150 nm) and (g), (h) 40 nm (100 nm). In all cases the patterned area was 4 mm2.

Image of FIG. 2.
FIG. 2.

(Color online) Out-of-plane room temperature hysteresis loops of the different large-area L10-Fe51Pt49 nanodot patterns on MgO(100) annealed at 800 °C for 1 h after fabrication and shown in Fig. 1.

Image of FIG. 3.
FIG. 3.

Cross-sectional high-resolution transmission electron microscope image of a 60 nm dot in the corresponding L10-Fe51Pt49 nanodot pattern (dot size 60 nm, periodicity 150 nm, patterned area 4 mm2) on MgO(100): (a) as-etched and (b) additionally annealed at 800 °C for 1 h. In both cases the inset shows a larger region of the corresponding nanodot array.

Image of FIG. 4.
FIG. 4.

Out-of-plane hysteresis loop of the large-scale 60 nm L10-Fe51Pt49 nanodot pattern (dot size 60 nm, periodicity 150 nm, patterned area 4 mm2) on MgO(100) measured at 100 K, 200 K and 300 K: (a) as-etched and (b) additionally annealed at 800 °C for 1 h.

Image of FIG. 5.
FIG. 5.

(Color online) Temperature dependence of the coercivity in the temperature range 40 K < T < 350 K for the large-area L10-Fe51Pt49 nanodot patterns of different dot size (100 nm, 80 nm, 60 nm, 40 nm) in the as-etched state and the additionally annealed state (annealing parameters: 800 °C/1 h).

Image of FIG. 6.
FIG. 6.

(Color online) Plot to determine the microstructural parameters α and N eff for the large-area L10-Fe51Pt49 nanodot patterns of different dot size (100 nm, 80 nm, 60 nm, 40 nm) in the as-etched state and the additionally annealed state (annealing parameters: 800 °C/1 h).

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/content/aip/journal/jap/110/7/10.1063/1.3646550
2011-10-11
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Influence of dot size and annealing on the magnetic properties of large-area L10-FePt nanopatterns
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/7/10.1063/1.3646550
10.1063/1.3646550
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