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Sanchez-Manzano D, Orfila G, Sander A, Marcano L, Gallego F, Mawass MA, Grilli F, Arora A, Peralta A, Cuellar FA, Fernandez-Roldan JA, Reyren N, Kronast F, Leon C, Rivera-Calzada A, Villegas JE, Santamaria J, Valencia S. Size-Dependence and High Temperature Stability of Radial Vortex Magnetic Textures Imprinted by Superconductor Stray Fields. ACS APPLIED MATERIALS & INTERFACES 2024; 16:19681-19690. [PMID: 38564236 DOI: 10.1021/acsami.3c17671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Swirling spin textures, including topologically nontrivial states, such as skyrmions, chiral domain walls, and magnetic vortices, have garnered significant attention within the scientific community due to their appeal from both fundamental and applied points of view. However, their creation, controlled manipulation, and stability are typically constrained to certain systems with specific crystallographic symmetries, bulk or interface interactions, and/or a precise stacking sequence of materials. Recently, a new approach has shown potential for the imprint of magnetic radial vortices in soft ferromagnetic compounds making use of the stray field of YBa2Cu3O7-δ superconducting microstructures in ferromagnet/superconductor (FM/SC) hybrids at temperatures below the superconducting transition temperature (TC). Here, we explore the lower size limit for the imprint of magnetic radial vortices in square and disc shaped structures as well as the persistence of these spin textures above TC, with magnetic domains retaining partial memory. Structures with circular geometry and with FM patterned to smaller radius than the superconductor island facilitate the imprinting of magnetic radial vortices and improve their stability above TC, in contrast to square structures where the presence of magnetic domains increases the dipolar energy. Micromagnetic modeling coupled with a SC field model reveals that the stabilization mechanism above TC is mediated by microstructural defects. Superconducting control of swirling spin textures, and their stabilization above the superconducting transition temperature by means of defect engineering holds promising prospects for shaping superconducting spintronics based on magnetic textures.
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Affiliation(s)
- David Sanchez-Manzano
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
- GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain
| | - Gloria Orfila
- GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain
| | - Anke Sander
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
| | - Lourdes Marcano
- Helmholtz-Zentrum Berlin, Albert-Einstein Str. 15, 12489 Berlin, Germany
- Department of Physics, Faculty of Science, University of Oviedo, 33007 Oviedo, Spain
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo de Miramón 194, 20014 Donostia-San Sebastián, Spain
| | - Fernando Gallego
- GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain
| | | | - Francesco Grilli
- Institute for Technical Physics Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Ashima Arora
- Helmholtz-Zentrum Berlin, Albert-Einstein Str. 15, 12489 Berlin, Germany
| | - Andrea Peralta
- GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain
| | - Fabian A Cuellar
- GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain
| | - Jose A Fernandez-Roldan
- Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany
| | - Nicolas Reyren
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
| | - Florian Kronast
- Helmholtz-Zentrum Berlin, Albert-Einstein Str. 15, 12489 Berlin, Germany
| | - Carlos Leon
- GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain
| | - Alberto Rivera-Calzada
- GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain
| | - Javier E Villegas
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
| | - Jacobo Santamaria
- GFMC. Department Física de Materiales. Facultad de Física. Universidad Complutense. 28040 Madrid, Spain
| | - Sergio Valencia
- Helmholtz-Zentrum Berlin, Albert-Einstein Str. 15, 12489 Berlin, Germany
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Superconducting imprint of magnetic textures in ferromagnets with perpendicular magnetic anisotropy. Sci Rep 2021; 11:20788. [PMID: 34675339 PMCID: PMC8531309 DOI: 10.1038/s41598-021-99963-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 09/28/2021] [Indexed: 11/28/2022] Open
Abstract
Research on proximity effects in superconductor/ferromagnetic hybrids has most often focused on how superconducting properties are affected—and can be controlled—by the effects of the ferromagnet’s exchange or magnetic fringe fields. The opposite, namely the possibility to craft, tailor and stabilize the magnetic texture in a ferromagnet by exploiting superconducting effects, has been more seldom explored. Here we show that the magnetic flux trapped in high-temperature superconducting YBa2Cu3O7-δ microstructures can be used to modify the magnetic reversal of a hard ferromagnet—a cobalt/platinum multilayer with perpendicular magnetic anisotropy—and to imprint unusual magnetic domain distributions in a controlled manner via the magnetic field history. The domain distributions imprinted in the superconducting state remain stable, in absence of an external magnetic field, even after increasing the temperature well above the superconducting critical temperature, at variance to what has been observed for soft ferromagnets with in-plane magnetic anisotropy. This opens the possibility of having non-trivial magnetic configuration textures at room temperature after being tailored below the superconducting transition temperature. The observed effects are well explained by micromagnetic simulations that demonstrate the role played by the magnetic field from the superconductor on the nucleation, propagation, and stabilization of magnetic domains.
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Lu Y, Jing Z, Yong H, Zhou Y. Flux avalanche in a superconducting film with non-uniform critical current density. Proc Math Phys Eng Sci 2016; 472:20160469. [PMID: 27843407 PMCID: PMC5095448 DOI: 10.1098/rspa.2016.0469] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Accepted: 09/22/2016] [Indexed: 11/12/2022] Open
Abstract
The flux avalanche in type-II superconducting thin film is numerically simulated in this paper. We mainly consider the effect of non-uniform critical current density on the thermomagnetic stability. The nonlinear electromagnetic constitutive relation of the superconductor is adopted. Then, Maxwell's equations and heat diffusion equation are numerically solved by the fast Fourier transform technique. We find that the non-uniform critical current density can remarkably affect the behaviour of the flux avalanche. The external magnetic field ramp rate and the environmental temperature have been taken into account. The results are compared with a film with uniform critical current density. The flux avalanche first appears at the interface where the critical current density is discontinuous. Under the same environmental temperature or magnetic field, the flux avalanche occurs more easily for the film with the non-uniform critical current density. The avalanche structure is a finger-like pattern rather than a dendritic structure at low environmental temperatures.
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Affiliation(s)
- Yurong Lu
- Key Laboratory of Mechanics on Disaster and Environment in Western China, Ministry of Education of China, Lanzhou, Gansu 730000, People's Republic of China
- Department of Mechanics and Engineering Sciences, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, Gansu 730000, People's Republic of China
| | - Ze Jing
- School of Mechano-Electronic Engineering, Xidian University, Xi'an, Shaanxi 710071, People's Republic of China
| | - Huadong Yong
- Key Laboratory of Mechanics on Disaster and Environment in Western China, Ministry of Education of China, Lanzhou, Gansu 730000, People's Republic of China
- Department of Mechanics and Engineering Sciences, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, Gansu 730000, People's Republic of China
| | - Youhe Zhou
- Key Laboratory of Mechanics on Disaster and Environment in Western China, Ministry of Education of China, Lanzhou, Gansu 730000, People's Republic of China
- Department of Mechanics and Engineering Sciences, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, Gansu 730000, People's Republic of China
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Anahory Y, Reiner J, Embon L, Halbertal D, Yakovenko A, Myasoedov Y, Rappaport ML, Huber ME, Zeldov E. Three-junction SQUID-on-tip with tunable in-plane and out-of-plane magnetic field sensitivity. NANO LETTERS 2014; 14:6481-6487. [PMID: 25310273 DOI: 10.1021/nl503022q] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Nanoscale superconducting quantum interference devices (SQUIDs) demonstrate record sensitivities to small magnetic moments but are typically sensitive only to the field component that is normal to the plane of the SQUID and out-of-plane with respect to the scanned surface. We report on a nanoscale three-junction Pb SQUID, which is fabricated on the apex of a sharp tip. Because of its three-dimensional structure, it exhibits a unique tunable sensitivity to both in-plane and out-of-plane fields. We analyze the two-dimensional interference pattern from both numerical and experimental points of view. This device is integrated into a scanning microscope, and its ability to independently measure the different components of the magnetic field with outstanding spin sensitivity better than 5 μB/Hz(1/2) is demonstrated. This highlights its potential as a local probe of nanoscale magnetic structures.
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Affiliation(s)
- Yonathan Anahory
- Department of Condensed Matter Physics, Weizmann Institute of Science , 76100 Rehovot, Israel
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Darhmaoui H, Jung J, Talvacchio J, Mohamed MA, Friedrich L. Temperature dependence of the magnetic-flux penetration into disk-shaped YBa2Cu3O7- delta thin films. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:12330-12339. [PMID: 9982865 DOI: 10.1103/physrevb.53.12330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Polyanskii AA, Gurevich A, Pashitski AE, Heinig NF, Redwing RD, Nordman JE, Larbalestier DC. Magneto-optical study of flux penetration and critical current densities in. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:8687-8697. [PMID: 9982382 DOI: 10.1103/physrevb.53.8687] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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