Subjects

- Ferromagnetism

- Superconducting properties and materials

- Surfaces, interfaces and thin films

Abstract

Intertwined superconducting and magnetic orders may give rise to exotic quantum phases1–7, including field-induced and re-entrant superconductivity8–10. However, such magnetism-enhanced superconductivity has remained elusive in superconductors with higher transition temperatures1–3. While infinite-layer nickelates represent a new class of unconventional superconductors11–20, the impact of rare-earth magnetism on superconducting properties remains largely unexplored. Here, we show that Eu-doped infinite-layer nickelate Sm0.95−xCa0.05EuxNiO2 exhibits a magnetic-field-induced re-entrant superconducting phase in the Eu-rich over-doped regime. Zero-resistance transport and high-field diamagnetic screening confirm the superconducting nature of this phase, which emerges after the initial suppression of low-field superconductivity and remains robust across a broad range of temperatures, fields and field orientations. In the same doping range, we observe nonlinear Hall transport and hysteretic magnetoresistance, indicating the unconventional nature of the re-entrant behaviour. While partially consistent with a compensation mechanism between the Eu-derived exchange field and the applied field, our data reveal pronounced deviations from this model at the highest-doping levels. Our findings establish infinite-layer nickelates as a fertile platform for exploring magnetically driven high-field superconductivity in strongly correlated oxides.

Access through your institution

Buy or subscribe

This is a preview of subscription content, access via your institution

Access options

Access through your institution

Access Nature and 54 other Nature Portfolio journals

Get Nature+, our best-value online-access subscription

$32.99 / 30 days

cancel any time

Learn more

Subscribe to this journal

Receive 51 print issues and online access

$199.00 per year

only $3.90 per issue

Learn more

Rent or buy this article

Prices vary by article type

from$1.95

to$39.95

Learn more

Prices may be subject to local taxes which are calculated during checkout

Author information

Author notes- These authors contributed equally: Mingwei Yang, Jiayin Tang, Xianfeng Wu

Authors and Affiliations

- Department of Physics, City University of Hong Kong, Kowloon, Hong Kong SAR, China

Mingwei Yang, Jiayin Tang, Wenjing Xu, Zhicheng Pei & Danfeng Li

- State Key Laboratory of Quantum Functional Materials, Department of Physics, and Guangdong Basic Research Center of Excellence for Quantum Science, Southern University of Science and Technology, Shenzhen, China

Xianfeng Wu, Heng Wang, Haoliang Huang, Sixia Hu, Qikun Xue & Zhuoyu Chen

- Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area, Shenzhen, China

Heng Wang, Haoliang Huang, Qikun Xue & Zhuoyu Chen

- Shenzhen Research Institute of City University of Hong Kong, Shenzhen, China

Wenjing Xu & Danfeng Li

- Anhui Key Laboratory of Low-Energy Quantum Materials and Devices, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei, China

Wenjie Meng, Guangli Kuang, Ze Wang, Chuanying Xi, Li Pi & Qingyou Lu

- Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan, China

Ming Yang, Junfeng Wang & Liang Li

- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China

Jinfeng Xu & Li Pi

- Hefei National Research Center for Physics Sciences at the Microscale, University of Science and Technology of China, Hefei, China

Qingyou Lu

- Hefei National Laboratory, University of Science and Technology of China, Hefei, China

Qingyou Lu

- Department of Physics, Boston College, Chestnut Hill, MA, USA

Ziqiang Wang

- Department of Physics, Tsinghua University, Beijing, China

Qikun Xue

Authors- Mingwei YangView author publications