Nanostructures and flux pinning properties in YBa2Cu3O7-y thin films with double perovskite Ba2LuNbO6 nanorods

被引：6

作者：

Gondo, Masaya ^{[1
]}

Yoshida, Masashi ^{[1
]}

Yoshida, Yuga ^{[1
]}

Ishimaru, Manabu ^{[1
]}

Horide, Tomoya ^{[1
]}

Matsumoto, Kaname ^{[1
]}

Kita, Ryusuke ^{[2
]}

机构：

[1] Kyushu Inst Technol, Dept Mat Sci & Engn, Kitakyushu, Fukuoka 8048550, Japan

[2] Shizuoka Univ, Grad Sch Integrated Sci & Technol, Hamamatsu, Shizuoka 4328561, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2021年 / 129卷 / 19期

基金：

日本学术振兴会;

关键词：

SUPERCONDUCTING TRANSITION-TEMPERATURE; COATED CONDUCTORS; STRAIN;

D O I：

10.1063/5.0048693

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Double perovskite Ba2LuNbO6 (BLNO)-doped YBa2Cu3O7-y (YBCO) thin films are fabricated on a SrTiO3 (001) substrate by pulsed laser deposition, and their nanostructures are characterized by transmission electron microscopy and scanning transmission electron microscopy. Cross-sectional observations and elemental mapping reveal that BLNO self-assembles during thin film deposition, and consequently, nanorods extending straight from the substrate to the surface are formed in the YBCO thin films. It is confirmed that stacking faults perpendicular to the growth direction disturb the formation of BLNO nanorods. Strain maps extracted by geometric phase analysis reveal that the tensile strain occurs in the YBCO matrix around the BLNO nanorods. Misfit dislocations are periodically introduced at the interface between the nanorod and the matrix, which results in the inhomogeneous strain of YBCO around the BLNO nanorods. The superconducting properties of the YBCO + BLNO thin films are compared with those of other previously reported YBCO thin films with normal perovskite and double perovskite nanorods.

引用

页数：8

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