Soft-magnetic coatings as possible sensors for magnetic imaging of superconductors

Ionescu, A.; Simmendinger, Julian; Bihler, M.; Miksch, Cornelia; Fischer, Peer; Soltan, S.; Schütz, Gisela; Albrecht, J.

doi:10.1088/1361-6668/ab5984

Cited by 3 publications

(3 citation statements)

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“…For power applications, to eliminate the unwanted proximity effects [ 27 ] and increase the J c a thin barrier layer is introduced at the SC/FM interface [ 28 ]. On the other hand, SC/FM heterostructures are also of great interest in superconducting electronics [ 29 , 30 , 31 , 32 ] where the properties of the ferromagnet are of utmost importance.…”

Section: Introductionmentioning

confidence: 99%

Ferromagnetism and Superconductivity in CaRuO3/YBa2Cu3O7-δ Heterostructures

et al. 2022

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The deposition of a ferromagnetic layer can affect the properties of high-temperature superconductors underneath. We investigated the influence of ferromagnetic CaRuO3 on the properties of YBa2Cu3O7-x (YBCO) superconducting thin films when the layers are either in direct contact or separated by a barrier layer of 5 nm SrTiO3. Detailed measurements of the magnetic moment of the superconductor and ferromagnet as a function of temperature and magnetic field have been performed using SQUID magnetometry. Magnetometry and relaxation measurements show that the modification of the superconducting properties of YBCO strongly depends on the interaction with the ferromagnetic layer on top. The barrier layer has a significant impact on both the supercon-ducting properties of the YBCO film and the ferromagnetic ordering of CaRuO3. The physical properties mentioned above were discussed in correlation with the materials’ structure determined by XRD analysis.

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Section: Introductionmentioning

confidence: 99%

Ferromagnetism and Superconductivity in CaRuO3/YBa2Cu3O7-δ Heterostructures

et al. 2022

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“…Currently, investigations of superconductor/ferromagnet (S/F) heterostructures are attracting increasing attention being motivated not only by studying the proximity effects at interface [1][2][3][4][5][6][7] but also by potential applications for superconducting electronics [8][9][10][11][12][13][14][15][16][17][18][19][20]. The key factor here is the realization of a superconducting spin-valve consisting of a single superconducting (S) layer between two ferromagnets where the density of states around the Fermi energy of the S film shows a spin-splitting caused by an effective * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

New superconductor/ferromagnet heterostructure formed by YBa₂Cu₃O_7−x and CaRuO₃

Ivan¹,

Pasuk²,

Crisan³

et al. 2021

Supercond. Sci. Technol.

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Almost all proposed configurations and practical achievements based on superconductor/ferromagnet (S/F) heterostrucutres focus on s-wave superconductors. However, several attempts targeted also high temperature superconductors, most of them using manganite ferromagnets LaXMnO3 (X: Ca or Sr) and Y1Ba2Cu3O7−x (YBCO). Here we propose a new ferromagnetic material that can be used with YBCO for the fabrication of S/F hybrid structures. We show that a ferromagnetic order can be induced in a thin layer (∼130 nm thickness) of CaRuO3 grown by pulsed laser deposition on epitaxial YBCO film. Detailed magnetic and structural investigations show that the observations of the weak ferromagnetism are consistent with the magnetic order induced by in-plane tensile strain of about 1.7% and the easy-magnetization axis forms an angle of ∼180º with the layer plane. The value of the Curie temperature T Curie estimated using the Curie–Weiss law was 340 K. An unusual temperature dependence of the magnetic moment around the superconducting transition was observed in both field-cooled and zero-field-cooled configurations which is attributed to the paramagnetic Meissner effect.

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“…film [19][20][21][22][23] . Indeed, recent experiments exploit this SC/FM interaction to characterize superconducting film properties using the ferromagnetic layer as a magneto-optically active material 24 , or to imprint magnetic unusual spin textures such as the recently reported skyrmion-like magnetic domain configurations in soft ferromagnets 10 .…”

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Superconducting imprint of magnetic textures in ferromagnets with perpendicular magnetic anisotropy

Sander

Orfila

Sanchez-Manzano

et al. 2021

Sci Rep

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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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Soft-magnetic coatings as possible sensors for magnetic imaging of superconductors

Cited by 3 publications

References 46 publications

Ferromagnetism and Superconductivity in CaRuO3/YBa2Cu3O7-δ Heterostructures

Ferromagnetism and Superconductivity in CaRuO3/YBa2Cu3O7-δ Heterostructures

New superconductor/ferromagnet heterostructure formed by YBa₂Cu₃O_7−x and CaRuO₃

Superconducting imprint of magnetic textures in ferromagnets with perpendicular magnetic anisotropy

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Soft-magnetic coatings as possible sensors for magnetic imaging of superconductors

Cited by 3 publications

References 46 publications

Ferromagnetism and Superconductivity in CaRuO3/YBa2Cu3O7-δ Heterostructures

Ferromagnetism and Superconductivity in CaRuO3/YBa2Cu3O7-δ Heterostructures

New superconductor/ferromagnet heterostructure formed by YBa2Cu3O7−x and CaRuO3

Superconducting imprint of magnetic textures in ferromagnets with perpendicular magnetic anisotropy

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New superconductor/ferromagnet heterostructure formed by YBa₂Cu₃O_7−x and CaRuO₃