@article{Qu2021, 
author = {Lili Qu and Da Lan and Liang Si and Chao Ma and Shasha Wang and Liqiang Xu and Kexuan Zhang and Feng Jin and Zixun Zhang and Enda Hua and Binbin Chen and Guanyin Gao and Feng Chen and Haifeng Du and Karsten Held and Lingfei Wang and Wenbin Wu},
title = {Asymmetric interfaces and high-TC ferromagnetic phase in La0.67Ca0.33MnO3/SrRuO3 superlattices},
year = {2021},
journal = {Nano Research},
volume = {14},
number = {10},
pages = {3621-3628},
keywords = {oxide heterointerfaces, asymmetric interfacial effects, ferromagnetic order, charge transfer},
url = {https://www.sciopen.com/article/10.1007/s12274-021-3644-0},
doi = {10.1007/s12274-021-3644-0},
abstract = {Interfacial magnetism in functional oxide heterostructures not only exhibits intriguing physical phenomena but also implies great potential for device applications. In these systems, interfacial structural and electronic reconstructions are essential for improving the stability and tunability of the magnetic properties. In this work, we constructed ultra-thin La0.67Ca0.33MnO3 (LCMO) and SrRuO3 (SRO) layers into superlattices, which exhibited a robust ferromagnetic phase. The high Curie temperature (TC) reaches 291 K, more than 30 K higher than that of bulk LCMO. We found that the LCMO/SRO superlattices consisted of atomically-sharp and asymmetric heterointerfaces. Such a unique interface structure can trigger a sizable charge transfer as well as a ferroelectric-like polar distortion. These two interfacial effects cooperatively stabilized the high-TC ferromagnetic phase. Our results could pave a promising approach towards effective control of interfacial magnetism and new designs of oxide-based spintronic devices.}
}