Effects of chirality of a helical magnetic field on a superconductor

We have investigated vortex states in a superconductor under a helical magnetic field from a chiral helimagnet. We solve the Ginzburg-Landau equations with three-dimensional finite element method. In this model, two antiparallel vortices appear under the helical magnetic field. There directions are normal to the largest surface of the superconductor.

[1]  Y. Togawa,et al.  Magnetic field dependence of most stable vortex states in the chiral helimagnet / superconductor bilayer system , 2017 .

[2]  Y. Togawa,et al.  Vortex states in a superconductor under a helical magnetic field , 2017 .

[3]  Y. Togawa,et al.  Magnetic flux distributions in chiral helimagnet/superconductor bilayers , 2017 .

[4]  Inoue Katsuya,et al.  Symmetry, Structure, and Dynamics of Monoaxial Chiral Magnets , 2016 .

[5]  Y. Togawa,et al.  Dependence of vortex states in superconductors on a chiral helimagnet and an applied magnetic field , 2016, 1605.05637.

[6]  Y. Togawa,et al.  Effects of chiral helimagnets on vortex states in a superconductor , 2016, 1605.05467.

[7]  N. Ghimire,et al.  Spin Structure of the Anisotropic Helimagnet Cr$_{1/3}$NbS$_2$ in a Magnetic Field , 2014, 1408.4327.

[8]  S. Okayasu,et al.  Direct Imaging of Vortex Polygons and Vortex Shells in Mesoscopic Squares of a Weak Pinning Superconducting Thin Film , 2014 .

[9]  A. S. Ovchinnikov,et al.  Chiral magnetic soliton lattice on a chiral helimagnet. , 2012, Physical review letters.

[10]  Y. Nakajima,et al.  Experimental demonstration of shrinkage of magnetic domains in a superconductor/ferromagnet bilayer , 2011 .

[11]  Y. Yoshida,et al.  Synthesis, Structure and Magnetic Properties of Chiral Molecule-Based Magnets , 2005 .

[12]  F. Peeters,et al.  Field-enhanced critical parameters in magnetically nanostructured superconductors , 2005, cond-mat/0504645.

[13]  I. Lyuksyutov,et al.  Ferromagnet–superconductor hybrids , 2004, cond-mat/0409137.

[14]  F. Peeters,et al.  Vortex-Antivortex Lattices in Superconducting Films with Magnetic Pinning Arrays , 2004 .

[15]  T. Moriya.  Anisotropic Superexchange Interaction and Weak Ferromagnetism , 1960 .

[16]  I. Dzyaloshinsky.  A thermodynamic theory of “weak” ferromagnetism of antiferromagnetics , 1958 .