Due to the lack of any magnetic order down to 1.7 K in the parent bulk compound NdNiO2, the recently discovered 9-15 K superconductivity in the infinite-layer Nd0.8Sr0.2NiO2 thin films has provided an exciting playground for unearthing new superconductivity mechanisms. In this letter, we report the successful synthesis of a series of superconducting Nd0.8Sr0.2NiO2 thin films ranging from 8 to 40 nm. We observe the large exchange bias effect between the superconducting Nd0.8Sr0.2NiO2 films and a thin ferromagnetic layer, which suggests the existence of the antiferromagnetic order. Furthermore, the existence of the antiferromagnetic order is evidenced by X-ray magnetic linear dichroism measurements. These experimental results are fundamentally critical for the current field.
@article{arxiv.2110.14915,
title = {Antiferromagnetism in Ni-Based Superconductors},
author = {Xiaorong Zhou and Xiaowei Zhang and Jiabao Yi and Peixin Qin and Zexin Feng and Peiheng Jiang and Zhicheng Zhong and Han Yan and Xiaoning Wang and Hongyu Chen and Haojiang Wu and Xin Zhang and Ziang Meng and Xiaojiang Yu and Mark B. H. Breese and Jiefeng Cao and Jingmin Wang and Chengbao Jiang and Zhiqi Liu},
journal= {arXiv preprint arXiv:2110.14915},
year = {2022}
}
Comments
25 pages, 22 figure, 1 table. The manuscript is in press at Advanced Materials