Fig. 2: Magnetic properties of the FeAs/InAs SLs. | Nature Communications

Fig. 2: Magnetic properties of the FeAs/InAs SLs.

From: Ferromagnetism and giant magnetoresistance in zinc-blende FeAs monolayers embedded in semiconductor structures

Fig. 2

a MCD spectra of sample A1–A4, compared with that of a reference sample (A0) of 12 nm-thick (In0.94,Fe0.06)As. All spectra were measured at 5 K and 1 T. b Magnetic field dependence of MCD intensity (MCD–H curves) measured at E1 in sample A1–A4 at various temperatures. c Curie temperature (TC) as a function of the distance tInAs between the FeAs MLs (pink circles). The error bars of 5 K are also plotted, which correspond to the minimum temperature step in our MCD–H measurements. The relationship can be fitted well by the TC ∝ tInAs−3 curve (dotted curve). The TC values calculated using Eq. (2) with A = 250 (open diamonds) also well reproduce the experimental results. d Magnetic field dependence of magnetization in sample A2–A4, measured by SQUID magnetometry at 10 K, under a magnetic field perpendicular to the film plane.

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