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Strain induced magnetic domain evolution and spin reorientation transition in epitaxial manganite films
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Hysteresis loops normalized with respect to the saturation magnetization (MS ) for applied field (H) along [100] and [001] directions. The solid line shows the least square fit to in-plane hysteresis loop.15 The inset shows the R vs. T along with zero field cooled (open circle) and field cooled (solid circle) M vs. T measured in H = 20 mT. (b) and (c) The MFM images of LCMO film taken at two different places at 120 K in the absence of magnetic field after zero field cooling. Here the scan area is 4 × 4 μm2. (d) The domain period as a function of length measured from line A to B as shown in (c). The inset shows the FFT image of (b). (e) The θ image extracted from MFM image (c). (f) The histogram of θ image showing most probable θm values (blue regions).

Image of FIG. 2.
FIG. 2.

(a–f) The MFM images at several temperatures near TC in zero magnetic field. All images captured have the scan area of 4 × 4 μm2 taken at the same place in continuous heating mode, while the nanometer scale offset due to the thermal drift has been controlled by x-y offset.

Image of FIG. 3.
FIG. 3.

(a) Schematic image of the stripe domain patternwith M lying completely in yz-plane with Mz (x) ∼ sin(πx/L). The right panel shows the MFM signals as we move across the stripe length, which fits quite well with a sinusoidal function (red line). (b) The θm and L as a function of K 1/Ω with K 1/K 2 = 7.9. The projections of M on yz-plane are shown for different regions. (c) The variation of L, K 1/Ω, and θm as we move from line A to B shown in Fig. 1(c).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Strain induced magnetic domain evolution and spin reorientation transition in epitaxial manganite films