中国物理B ›› 2022, Vol. 31 ›› Issue (10): 107401-107401.doi: 10.1088/1674-1056/ac7a1a

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Synthesis and properties of La1-xSrxNiO3 and La1-xSrxNiO2

Mengwu Huo(霍梦五), Zengjia Liu(刘增家), Hualei Sun(孙华蕾), Lisi Li(李历斯), Hui Lui(刘晖), Chaoxin Huang(黄潮欣), Feixiang Liang(梁飞翔), Bing Shen(沈冰), and Meng Wang(王猛)†   

  1. Center for Neutron Science and Technology, Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-Sen University, Guangzhou 510275, China
  • 收稿日期:2022-04-29 修回日期:2022-06-08 出版日期:2022-10-16 发布日期:2022-09-24
  • 通讯作者: Meng Wang E-mail:wangmeng5@mail.sysu.edu.cn
  • 基金资助:
    Work at Sun Yat-Sen University was supported by the National Natural Science Foundation of China (Grant Nos. 12174454, 11904414, 11904416, and U2130101), the Guangdong Basic and Applied Basic Research Foundation (Grant No. 2021B1515120015), the Guangzhou Basic and Applied Basic Research Foundation (Grant No. 202201011123), and the National Key Research and Development Program of China (Grant No. 2019YFA0705702).

Synthesis and properties of La1-xSrxNiO3 and La1-xSrxNiO2

Mengwu Huo(霍梦五), Zengjia Liu(刘增家), Hualei Sun(孙华蕾), Lisi Li(李历斯), Hui Lui(刘晖), Chaoxin Huang(黄潮欣), Feixiang Liang(梁飞翔), Bing Shen(沈冰), and Meng Wang(王猛)†   

  1. Center for Neutron Science and Technology, Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-Sen University, Guangzhou 510275, China
  • Received:2022-04-29 Revised:2022-06-08 Online:2022-10-16 Published:2022-09-24
  • Contact: Meng Wang E-mail:wangmeng5@mail.sysu.edu.cn
  • Supported by:
    Work at Sun Yat-Sen University was supported by the National Natural Science Foundation of China (Grant Nos. 12174454, 11904414, 11904416, and U2130101), the Guangdong Basic and Applied Basic Research Foundation (Grant No. 2021B1515120015), the Guangzhou Basic and Applied Basic Research Foundation (Grant No. 202201011123), and the National Key Research and Development Program of China (Grant No. 2019YFA0705702).

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摘要： Superconductivity has been realized in films of La1-xSrxNiO2. Here we report synthesis and characterization of polycrystalline samples of La1-xSrxNiO3 and La1-xSrxNiO2 (0 ≤ x ≤ 0.2). Magnetization and resistivity measurements reveal that La1-xSrxNiO3 are paramagnetic metal and La1-xSrxNiO2 exhibit an insulating behavior. Superconductivity is not detected in bulk samples of La1-xSrxNiO2. The absence of superconductivity in bulk La1-xSrxNiO2 may be due to the generation of hydroxide during reduction, a small amount of nickel impurity, or incomplete reduction of apical oxygen. The effect of interface in films of La1-xSrxNiO2 may also play a role for superconductivity.

关键词: nickel oxide, superconductivity

Abstract: Superconductivity has been realized in films of La1-xSrxNiO2. Here we report synthesis and characterization of polycrystalline samples of La1-xSrxNiO3 and La1-xSrxNiO2 (0 ≤ x ≤ 0.2). Magnetization and resistivity measurements reveal that La1-xSrxNiO3 are paramagnetic metal and La1-xSrxNiO2 exhibit an insulating behavior. Superconductivity is not detected in bulk samples of La1-xSrxNiO2. The absence of superconductivity in bulk La1-xSrxNiO2 may be due to the generation of hydroxide during reduction, a small amount of nickel impurity, or incomplete reduction of apical oxygen. The effect of interface in films of La1-xSrxNiO2 may also play a role for superconductivity.

Key words: nickel oxide, superconductivity

中图分类号:  (Superconducting materials other than cuprates)

  • 74.70.-b
74.25.fc (Electric and thermal conductivity) 74.62.Dh (Effects of crystal defects, doping and substitution)