RHEED intensity oscillations of the 3rd period in (LSMO10/BTO6)5. Surface morphology over an area of 3 × 3 μm2 is shown in the inset.
(a) ω-2θ XRD pattern recorded around the (002) peak of LSMO/BTO superlattices; and (b) the estimated superlattice period as a function of the thickness of LSMO layers. Calculated periods in fully strained and fully relaxed conditions are shown for comparison.
Two-dimensional reciprocal space mapping of the 12/4 (a) and 4/12 (b) samples around the asymmetric (301) spot. The asterisk in (b) represents the diffraction peak of fully relaxed LSMO.
(a) Field dependent of magnetic hysteresis loops of LSMO/BTO superlattices measured at 10 K with an applied magnetic field up to 3 kOe. The inset shows the low field portion of hysteresis loops of the 6/10 and 4/12 samples. (b) Temperature dependent ZFC and FC magnetization curves of LSMO/BTO superlattices measured under an applied magnetic field of 100 Oe.
The temperature dependent resistivity of the 12/4, 10/6, and 8/8 samples, respectively.
MR as a function of magnetic field H for the 12/4, 10/6, and 8/8 samples measured at 250 K (a), 100 K (b), and 5 K (c), with the magnetic field applied perpendicular to the substrate. The 100 K MR at low fields is shown in the inset of (b). MR as a function of magnetic field H for the 12/4, 10/6, and 8/8 samples measured at 250 K (e), 100 K (d), and 5 K (f), with the magnetic field applied in the plane of the substrate.
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