Pulsed Laser Deposition of High Temperature Superconductors: Growth, Characterization and Irradiation for Flux Quanta Manipulation

Sandra Keppert

Pulsed Laser Deposition of High Temperature Superconductors: Growth, Characterization and Irradiation for Flux Quanta Manipulation

Sandra Keppert

Institute of Applied Physics

Research output: Thesis › Doctoral thesis

Abstract

The fabrication of the high temperature superconductor Bi2Sr2CaCu2O8+δ (Bi-2212) into thin films by using the pulsed laser deposition method is optimized to fabricate below 50 nm thin films with outstanding superconducting properties (highest reported critical current density
JC (60 K)= 1.2 MA/cm² for films of 45 nm thickness). What makes this material specifically stand out over others is its high anisotropy when it comes to electrical and superconducting properties. Because of this, magnetic flux vortices in Bi-2212 can move in form of pancake vortices, making it a quasi-2D material which is interesting for fluxonic applications. Flux vortices can be pinned by creating artificial pinning centers in superconductors, resulting in so-called vortex-matching behavior in magnetic fields.
The deposited films are nanostructured using a helium ion microscope to achieve the highest vortex-matching fields in Bi-2212 reported up to this date. This vortex-matching behavior is dependent on irradiation dose and the geometry of the irradiation pattern, giving insight into the vortex dynamics of this material.

Original language	English
Qualification	PhD
Supervisors/Reviewers	Pedarnig, Johannes David, Supervisor
Publication status	Published - 2025

Fields of science

210005 Nanophotonics
103016 Laser physics

Access to Document

https://epub.jku.at/11333821

Cite this

@phdthesis{ce57e3bb63d4474486eaedd98b469027,

title = "Pulsed Laser Deposition of High Temperature Superconductors: Growth, Characterization and Irradiation for Flux Quanta Manipulation",

abstract = "The fabrication of the high temperature superconductor Bi2Sr2CaCu2O8+δ (Bi-2212) into thin films by using the pulsed laser deposition method is optimized to fabricate below 50 nm thin films with outstanding superconducting properties (highest reported critical current density JC (60 K)= 1.2 MA/cm² for films of 45 nm thickness). What makes this material specifically stand out over others is its high anisotropy when it comes to electrical and superconducting properties. Because of this, magnetic flux vortices in Bi-2212 can move in form of pancake vortices, making it a quasi-2D material which is interesting for fluxonic applications. Flux vortices can be pinned by creating artificial pinning centers in superconductors, resulting in so-called vortex-matching behavior in magnetic fields. The deposited films are nanostructured using a helium ion microscope to achieve the highest vortex-matching fields in Bi-2212 reported up to this date. This vortex-matching behavior is dependent on irradiation dose and the geometry of the irradiation pattern, giving insight into the vortex dynamics of this material.",

author = "Sandra Keppert",

year = "2025",

language = "English",

}

TY - BOOK

T1 - Pulsed Laser Deposition of High Temperature Superconductors: Growth, Characterization and Irradiation for Flux Quanta Manipulation

AU - Keppert, Sandra

PY - 2025

Y1 - 2025

N2 - The fabrication of the high temperature superconductor Bi2Sr2CaCu2O8+δ (Bi-2212) into thin films by using the pulsed laser deposition method is optimized to fabricate below 50 nm thin films with outstanding superconducting properties (highest reported critical current density JC (60 K)= 1.2 MA/cm² for films of 45 nm thickness). What makes this material specifically stand out over others is its high anisotropy when it comes to electrical and superconducting properties. Because of this, magnetic flux vortices in Bi-2212 can move in form of pancake vortices, making it a quasi-2D material which is interesting for fluxonic applications. Flux vortices can be pinned by creating artificial pinning centers in superconductors, resulting in so-called vortex-matching behavior in magnetic fields. The deposited films are nanostructured using a helium ion microscope to achieve the highest vortex-matching fields in Bi-2212 reported up to this date. This vortex-matching behavior is dependent on irradiation dose and the geometry of the irradiation pattern, giving insight into the vortex dynamics of this material.

AB - The fabrication of the high temperature superconductor Bi2Sr2CaCu2O8+δ (Bi-2212) into thin films by using the pulsed laser deposition method is optimized to fabricate below 50 nm thin films with outstanding superconducting properties (highest reported critical current density JC (60 K)= 1.2 MA/cm² for films of 45 nm thickness). What makes this material specifically stand out over others is its high anisotropy when it comes to electrical and superconducting properties. Because of this, magnetic flux vortices in Bi-2212 can move in form of pancake vortices, making it a quasi-2D material which is interesting for fluxonic applications. Flux vortices can be pinned by creating artificial pinning centers in superconductors, resulting in so-called vortex-matching behavior in magnetic fields. The deposited films are nanostructured using a helium ion microscope to achieve the highest vortex-matching fields in Bi-2212 reported up to this date. This vortex-matching behavior is dependent on irradiation dose and the geometry of the irradiation pattern, giving insight into the vortex dynamics of this material.

M3 - Doctoral thesis

ER -