Ferromagnetic Josephson junctions based on epitaxial NbN/Ni60Cu40/NbN trilayer

被引：7

作者：

Li, Feng ^{[1
,2
,3
]}

Zhang, Hui ^{[1
,2
]}

Zhang, Lu ^{[1
,2
,3
]}

Peng, Wei ^{[1
,2
]}

Wang, Zhen ^{[1
,2
,3
,4
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China

[2] CAS Ctr Excellence Superconducting Elect CENSE, Shanghai 200050, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] Univ ShanghaiTech, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China

来源：

AIP ADVANCES | 2018年 / 8卷 / 05期

关键词：

NBN/ALN/NBN TUNNEL-JUNCTIONS; SINGLE-CRYSTAL; SUPERCONDUCTING PROPERTIES; NIOBIUM NITRIDE; CURRENT DENSITY; FILMS; TEMPERATURE; NBN; TECHNOLOGY; SQUID;

D O I：

10.1063/1.5030348

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We fabricated and characterized a weakly coupled magnetic Josephson junction based on epitaxial NbN/Ni60Cu40/NbN trilayer heterostructures on single crystal MgO (100) substrates. X-ray diffraction and cross-sectional scanning transmission electron microscopy were used to verify the epitaxial growth of NbN/Ni60Cu40/NbN trilayer, while the ferromagnetic properties of NiCu on NbN film were recorded by plotting the magnetization as a function of both the temperature and the magnetic field strength. The NbN/Ni60Cu40/NbN junctions demonstrated typical Josephson effect with a nonlinear overdamped current-voltage characteristic and a characteristic voltage of 9.1 mu V. The magnetic field dependence of the junction critical current showed a nearly ideal Fraunhofer-like pattern with a magnetic field shift of about 12 Oe due to the remanent magnetization of Ni60Cu40 layer. (C) 2018 Author(s).

引用

页数：6

共 27 条

[1] PROPERTIES OF NBN THIN-FILMS DEPOSITED ON AMBIENT-TEMPERATURE SUBSTRATES [J].