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Realizing a high magnetic moment in Gd/Cr/FeCo: The role of the rare earth
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) In plane saturation magnetization (H = 50 kOe) of Gd (6 nm)/Cr (xnm)/Fe70Co30 (4.23 nm) showing modulation. Included are Gd (6 nm) and Fe70Co30 (4.23 nm) for reference purposes. (b) Maximum saturating magnetization taken at 4 K (H = 50 kOe) with respect to Cr interlayer thickness highlighting an oscillatory nature of the coupling.

Image of FIG. 2.
FIG. 2.

In plane saturation magnetization (H = 50 kOe) of Gd(50 nm)/Cr(1.3 nm)/Fe70Co30 (4.23 nm) and Gd(25 nm)/Cr(1.3 nm)/Fe70Co30 (4.23 nm) showing influence of thickness of Gd layer.

Image of FIG. 3.
FIG. 3.

XRD spectra (Θ-2Θ) of samples of (a) Gd(50 nm)/Cr(1.3 nm)/Fe70Co30(4.23 nm), (b) Gd(25 nm)/Cr(1.3 nm)/Fe70Co30(4.23 nm), (c) Gd (12 nm)/Cr(1.3 nm)/Fe70Co30(4.23 nm), (d) Gd(6 nm)/Cr(1.3 nm)/Fe70Co30 (4.23 nm), and (e) Gd(6 nm) reference, sputtered on a Si/SiO2 wafer at 350 °C, the presence of significant proportions of fcc Gd for thinner layers should be noted and also the evolution of hcp Gd with respect to the fcc phase for thicker depositions. (As a guide the 29.1° and 30.95° 2Θ angles are highlighted for clarity).

Image of FIG. 4.
FIG. 4.

(a) XRD spectra (Θ-2Θ) of samples of Gd (4 nm) sputtered on SiO2 showing a purely fcc composition. (b) In plane saturation magnetization (H = 10 KOe) and remnant field of Gd (4 nm), (c) In plane zero field cooled (—>)—field cooled (<—) moments (H = 100 Oe) of Gd (4 nm) layer showing magnetic transitions.

Image of FIG. 5.
FIG. 5.

Attempted correction of Figure 2 data of Gd (50 nm)/Cr (1.3 nm)/Fe70Co30 (4.23 nm). Correction assumes no contribution from selected fcc strata and shows effect on magnetic data when the strata is 5 and 10 nm.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Realizing a high magnetic moment in Gd/Cr/FeCo: The role of the rare earth