| Title: |
Control of magnetic anisotropy by orbital hybridization in (La0.67Sr0.33MnO3)n/(SrTiO3)n superlattice |
| Authors: |
Zhang, Bangmin, Wu, Lijun, Zheng, Jincheng, Yang, Ping, Yu, Xiaojiang, Ding, Jun, Heald, Steve M., Rosenberg, R. A., Venkatesan, T., Chen, Jingsheng, Sun, Cheng-Jun, Zhu, Yimei, Chow, Gan Moog |
| Publication Year: |
2017 |
| Collection: |
Condensed Matter |
| Subject Terms: |
Condensed Matter - Materials Science |
| More Details: |
The asymmetry of chemical nature at the hetero-structural interface offers an unique opportunity to design desirable electronic structure by controlling charge transfer and orbital hybridization across the interface. However, the control of hetero-interface remains a daunting task. Here, we report the modulation of interfacial coupling of (La0.67Sr0.33MnO3)n/(SrTiO3)n superlattices by manipulating the periodic thickness with n unit cells of SrTiO3 and n unit cells La0.67Sr0.33MnO3. The easy axis of magnetic anisotropy rotates from in-plane (n = 10) to out-of-plane (n = 2) orientation at 150 K. Transmission electron microscopy reveals enlarged tetragonal ratio > 1 with breaking of volume conservation around the (La0.67Sr0.33MnO3)n/(SrTiO3)n interface, and electronic charge transfer from Mn to Ti 3d orbitals across the interface. Orbital hybridization accompanying the charge transfer results in preferred occupancy of 3d3z2-r2 orbital at the interface, which induces a stronger electronic hopping integral along the out-of-plane direction and corresponding out-of-plane magnetic easy axis for n = 2. We demonstrate that interfacial orbital hybridization in superlattices of strongly correlated oxides may be a promising approach to tailor electronic and magnetic properties in device applications. |
| Document Type: |
Working Paper |
| DOI: |
10.1038/s41427-018-0084-8 |
| Access URL: |
http://arxiv.org/abs/1709.03903 |
| Accession Number: |
edsarx.1709.03903 |
| Database: |
arXiv |
