Domain wall induced modulation of low field H-T phase diagram in patterned superconductor-ferromagnet stripes

@article{Bhatia2019DomainWI,
  title={Domain wall induced modulation of low field H-T phase diagram in patterned superconductor-ferromagnet stripes},
  author={Ekta Bhatia and Zoe H. Barber and Ilari J. Maasilta and Kartik Senapati},
  journal={AIP Advances},
  year={2019}
}
We present a systematic study of the magnetic domain wall induced modulation of superconducting transition temperature (Tc) in Nb/Ni bilayer stripes. By varying the thickness of the Ni layer from 20 nm to 100 nm we have been able to measure the low field Tc-H phase diagram spanning the Neel domain wall and Bloch domain wall range of thicknesses. Micromagnetic simulations and magnetic force microscopy measurements confirmed a stronger out-of-plane stray field in the Bloch domain walls compared… 
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References

SHOWING 1-10 OF 38 REFERENCES

Domain wall modulated superconductivity in Nb Y3Fe5O12 hybrids

In superconductor/ferromagnet hybrids, the stray field and inhomogeneous exchange field coming from magnetic domain walls have opposite influence on the superconductivity if the ferromagnet displays

Enhancement of the superconducting transition temperature in Nb/permalloy bilayers by controlling the domain state of the ferromagnet.

It is shown that domain walls in a single F layer yield a similar effect to the suppression of superconductivity by the exchange field h(ex) of the ferromagnet, and the transport properties of Ni(0.80)Fe( 0.20)/Nb bilayers structured in strips of different sizes are studied.

Magnetic charge distribution and stray field landscape of asymmetric néel walls in a magnetically patterned exchange bias layer system

The 3D stray field landscape above an exchange bias layer system with engineered domain walls has been fully characterized by quantitative magnetic force microscopy (qMFM) measurements. This method

Domain-wall superconductivity in superconductor–ferromagnet hybrids

It is argued that the compensation of the applied field by the stray fields of the magnetic domains as well as the change in the domain structure is responsible for the appearance of the DWS and the coexistence of superconductivity and magnetism in the superconductor–ferromagnet hybrids.

Sudden magnetization drops in superconductor/ferromagnet bilayered structures

We report in-plane magnetization measurements on Nb/Co bilayers using a thin superconductor Nb ∼ 25 nm and a thick ferromagnet Co ∼ 40−55 nm where Bloch domain walls (BDW) are energetically

Sudden critical current drops induced in S/F structures

In the search for new physical properties of S/F structures, we have found that the superconductor critical current can be controlled by the domain state of the neighboring ferromagnet. The

Shape critical properties of patterned Permalloy thin films.

Superconducting spintronics with magnetic domain walls

The recent experimental demonstration of spin-polarized supercurrents offers a venue for establishment of a superconducting analog to conventional spintronics. Whereas domain-wall motion in purely

Stray field and the superconducting surface spin valve effect in La0.7Ca0.3MnO3/YBa2Cu3O7−δ bilayers

Electronic transport and magnetization measurements were carried out on La0.7Ca0.3MnO3/YBa2Cu3O7−δ (LCMO/YBCO) bilayers below the superconducting transition temperature in order to study the

Magnetically modulated critical current densities of Co/Nb hybrid

Investigation of critical current density in a large-area Co/Nb hybrid via facile colloidal lithography, which has important implications for understanding the role of magnetic subsystem modulating superconductivity, as well as applied to low-energy electronic devices such as superconducting current fault limiters.