Vortex-antivortex coexistence in Nb-based superconductor/ferromagnet heterostructures

Bobba, F.; Di Giorgio, C.; Scarfato, Alessandro; Longobardi, Maria; Iavarone, M.; Moore, S. A.; Karapetrov, G.; Novosad, V.; Yefremenko, V.; Cucolo, A. M.

doi:10.1103/PhysRevB.89.214502

Scientific article

English

Vortex-antivortex coexistence in Nb-based superconductor/ferromagnet heterostructures

Contributors

Bobba, F.; Di Giorgio, C.; Scarfato, Alessandro; Longobardi, Maria; Iavarone, M.; Moore, S. A.; Karapetrov, G.; Novosad, V.; Yefremenko, V.; Cucolo, A. M.

Published in

Physical review. B, Condensed matter and materials physics, vol. 89, no. 21, 214502

Publication date

2014

Abstract

Low-temperature magnetic force microscopy was used to study the threshold of nucleation of spontaneous vortex-antivortex structures in superconductor/ferromagnet (S/F) hybrid systems. We investigated S/F heterostructures composed of Py as the magnetic material and Nb as the superconductor, with different thicknesses of Py and Nb. The condition for nucleation of spontaneous vortex-antivortex structures depends on fundamental parameters such as the superconducting penetration depth and the coherence length, as well as on the thickness of the superconducting film and the magnetic domain width. We compare our experimental results with those of existing theoretical models and provide an estimate of the threshold of the local out-of-plane component of the magnetization for different Py film thicknesses.

Keywords

Superconductivity
Ferromagnetism
Heterostructure
Scanning probe

UNIGE affiliation entities

Faculté des sciences / Section de physique / Département de physique de la matière quantique

UNIGE research groups

Groupe Renner

Citation (ISO format)

BOBBA, F. et al. Vortex-antivortex coexistence in Nb-based superconductor/ferromagnet heterostructures. In: Physical review. B, Condensed matter and materials physics, 2014, vol. 89, n° 21, p. 214502. doi: 10.1103/PhysRevB.89.214502

Article (Published version)

Identifiers

PID : unige:38591
DOI : 10.1103/PhysRevB.89.214502

Journal ISSN

1098-0121

736views

2downloads

Creation

10/07/2014 15:19:00

First validation

10/07/2014 15:19:00

Update

14/03/2023 21:26:22

Status update

14/03/2023 21:26:22

Last indexation

30/10/2024 19:23:14

Vortex-antivortex coexistence in Nb-based superconductor/ferromagnet heterostructures

Contributors

Published in

Publication date

Abstract

Keywords

UNIGE affiliation entities

UNIGE research groups

Citation (ISO format)

Main files (1)

Identifiers

Journal ISSN

Technical informations

Creation

First validation

Update

Status update

Last indexation