Abstract
We report cryogenic magnetic force microscopy studies of anisotropic-strained (La0.8Pr0.2)2/3Ca1/3MnO3/NdGaO3(001) thin films. Real-space magnetic imaging reveals a robust charge-ordered insulating (COI) magnetic phase with a strong relaxation feature. Remarkably, in the first melting and reappear-then-melting processes, the ferromagnetic metallic (FMM) domain configurations differ dramatically, showing a droplet-like and a stripe-like pattern, respectively. These observations illustrate that the FMM nuclei are randomly self-organized distributed in the virgin highly COI-dominant phase separation state recorded after zero field cooling. Regardless of how to reach the saturated FMM state, the anisotropic nature of the long-range strain involves in and dominates to form well-ordered FMM stripes eventually. Our results facilitate the control and manipulation of phase separation morphology at the micrometer scale.
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