Anti-site disorder is one of the most important issues that arises in synthesis of double perovskite for spintronic applications. Although it is known that anti-site disorder leads to a proliferation of structural defects, known as the anti-phase boundaries that separate ordered anti-phase domains in the sample, little is known about the magnetic correlation across these anti-phase boundaries on a microscopic level. Motivated by this, we report resonant elastic X-ray scattering study of room temperature magnetic and structural correlation in a thin-film sample of Sr2CrReO6, which has one of the highest TC among double perovskites. Structurally, we discovered existence of anti-phase nanodomains of ∼15~nm in the sample. Magnetically, the ordered moments are shown to lie perpendicular to the c direction. Most remarkably, we found that the magnetic correlation length far exceeds the size of individual anti-phase nanodomains. Our results therefore provide conclusive proof for existence of robust magnetic correlation across the anti-phase boundaries in Sr2CrReO6.
@article{arxiv.2010.06646,
title = {Robust Long Range Magnetic Correlation across Anti-phase Domain Boundaries in Sr$_2$CrReO$_6$},
author = {Bo Yuan and Subin Kim and Sae Hwan Chun and Wentao Jin and C. S. Nelson and Adam J. Hauser and F. Y. Yang and Young-June Kim},
journal= {arXiv preprint arXiv:2010.06646},
year = {2021}
}
Comments
5 page, 4 figures; Supplemental Materials upon request