Two-phase behavior in strained thin films of hole-doped manganites

Details Two-phase behavior in strained thin films of hole-doped manganites Two-phase behavior in strained thin films of hole-doped manganites

1999-10-29

arxiv.org/abs/cond-mat/9910501v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages ReVTeX, 5 figures included, Figures 3, 4 and 5 low resolution, high resolution figures available on request from autho

Scientific paper

10.1103/PhysRevB.61.9665

We present a study of the effect of biaxial strain on the electrical and magnetic properties of thin films of manganites. We observe that manganite films grown under biaxial compressive strain exhibit island growth morphology which leads to a non-uniform distribution of the strain. Transport and magnetic properties of these films suggest the coexistence of two different phases, a metallic ferromagnet and an insulating antiferromagnet. We suggest that the high strain regions are insulating while the low strain regions are metallic. In such non-uniformly strained samples, we observe a large magnetoresistance and a field-induced insulator to metal transition.

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