Syntropic spin alignment at the interface between ferromagnetic and superconducting nitrides

Jin, Qiao1,2; Zhang, Qinghua1,2; Bai, He3; Yang, Meng1,2,4,5; Ga, Yonglong6; Chen, Shengru1,2,4,5; Hong, Haitao1,2,4,5; Cui, Ting1,2,4,5; Rong, Dongke1,2,4,5; Lin, Ting1,2,4,5; Wang, Jia-Ou7; Ge, Chen1,2,4,5,8; Wang, Can1,2,4,5,8; Cao, Yanwei6; Gu, Lin9,10; Song, Guozhu11; Wang, Shanmin11; Jiang, Kun1,2,4,5,8; Cheng, Zhi-Gang1,2; Zhu, Tao1,2,4,5,8; Yang, Hongxin12; Jin, Kui-juan1,2,4,5,8; Guo, Er-Jia1,2,4,5,8

2024-03-01

10.1093/nsr/nwae107

NATIONAL SCIENCE REVIEW   影响因子和分区

2095-5138

2053-714X

["The magnetic correlations at the superconductor/ferromagnet (S/F) interfaces play a crucial role in realizing dissipation-less spin-based logic and memory technologies, such as triplet-supercurrent spin-valves and 'pi' Josephson junctions. Here we report the observation of an induced large magnetic moment at high-quality nitride S/F interfaces. Using polarized neutron reflectometry and DC SQUID measurements, we quantitatively determined the magnetization profile of the S/F bilayer and confirmed that the induced magnetic moment in the adjacent superconductor only exists below TC. Interestingly, the direction of the induced moment in the superconductors was unexpectedly parallel to that in the ferromagnet, which contrasts with earlier findings in S/F heterostructures based on metals or oxides. First-principles calculations verified that the unusual interfacial spin texture observed in our study was caused by the Heisenberg direct exchange coupling with constant J similar to 4.28 meV through d-orbital overlapping and severe charge transfer across the interfaces. Our work establishes an incisive experimental probe for understanding the magnetic proximity behavior at S/F interfaces and provides a prototype epitaxial 'building block' for superconducting spintronics.","The superconducting nitrides exhibited an unexpectedly parallel-aligned large magnetic moment across the interfaces when brought into proximity with a strong ferromagnetic nitride."]

magnetic proximity effects nitride interfaces polarized neutron reflectometry superconductor/ferromagnetic interfaces superconducting spintronics

SCI ; EI

英语

其他

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:001222682400001

OXFORD UNIV PRESS

20242916727396

Charge transfer ; Ferromagnetic materials ; Ferromagnetism ; Magnetic moments ; Neutron reflection ; Nitrides ; Reflection ; Reflectometers ; Textures

Magnetism: Basic Concepts and Phenomena:701.2 ; Superconducting Materials:708.3 ; Magnetic Materials:708.4 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2 ; Optical Instruments:941.3

Web of Science

1.Acad Sci, Beijing Natl Lab Condensed Matter, Beijing 100190, Peoples R China
2.Inst Phys, Chinese Acad Sci, Beijing 100190, Peoples R China
3.Spallat Neutron Source Sci Ctr, Dongguan 523803, Peoples R China
4.Univ Chinese Acad Sci, Dept Phys, Beijing 100049, Peoples R China
5.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China
7.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
8.Songshan Lake Mat Lab, Guangdong 523808, Peoples R China
9.Tsinghua Univ, Natl Ctr Electron Microscopy, Beijing 100084, Peoples R China
10.Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China
11.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
12.Zhejiang Univ, Sch Phys, Hangzhou 310027, Peoples R China

Jin, Qiao,Zhang, Qinghua,Bai, He,et al. Syntropic spin alignment at the interface between ferromagnetic and superconducting nitrides[J]. NATIONAL SCIENCE REVIEW,2024,11.

Jin, Qiao.,Zhang, Qinghua.,Bai, He.,Yang, Meng.,Ga, Yonglong.,...&Guo, Er-Jia.(2024).Syntropic spin alignment at the interface between ferromagnetic and superconducting nitrides.NATIONAL SCIENCE REVIEW,11.

Jin, Qiao,et al."Syntropic spin alignment at the interface between ferromagnetic and superconducting nitrides".NATIONAL SCIENCE REVIEW 11(2024).