Encoding Magnetic States in Monopole-Like Configurations Using Superconducting Dots.

Anna Palau,D Alan Tennant,Xavier Obradors,Carles Navau,Ashima Arora,Nuria Del‐Valle,Matteo Cialone,Florian Kronast,Teresa Puig,Alvaro Sanchez,Sergio Valencia

doi:10.1002/advs.201600207

Abstract

A large manifold of nontrivial spin textures, including the stabilization of monopole-like fields, are generated by using a completely new and versatile approach based on the combination of superconductivity and magnetism. Robust, stable, and easily controllable complex spin structures are encoded, modified, and annihilated in a continuous magnetic thin film by defining a variety of magnetic states in superconducting dots.

Highlights

The emergence of nontrivial magnetic states such as vortices, skyrmions, and monopoles has extended the boundaries of magnetism and at the same time opened up novel technological possibilities for controlling and manipulating magnetic and electronic states.[1,2,3,4] Especially attractive are artificial monopolelike defects because of their similarity to magnetic charges
We use the combination of superconductivity and magnetism in a hitherto unexplored way to imprint nontrivial spin textures
We have prepared a particular SC-FM hybrid system consisting of high-temperature YBa2Cu3O7−δ superconducting dots, patterned with different shapes, and covered by a continuous thin ferromagnetic Permalloy (Py) layer, see Figure 1a and Experimental Section

Summary

Introduction

The emergence of nontrivial magnetic states such as vortices, skyrmions, and monopoles has extended the boundaries of magnetism and at the same time opened up novel technological possibilities for controlling and manipulating magnetic and electronic states.[1,2,3,4] Especially attractive are artificial monopolelike defects because of their similarity to magnetic charges. Micromagnetic simulations are used to calculate the 3D spin texture in the Py layer, considering the whole SC-FM hybrid squared structure (Figure 1e).[30] The obtained magnetic moment distribution confirms the in-plane spin component measured experimentally.

Results

Conclusion