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The electronic and magnetic structures in the normal and superconducting states of iron pnictides are investigated by solving self-consistently the Bogoliubov-de Gennes equation. It is shown that strong electron correlations can induce…

Superconductivity · Physics 2011-07-07 Huaixiang Huang , Degang Zhang , Tao Zhou , C. S. Ting

The coupling between a current and a Bloch wall is examined in the half-metal limit of the double exchange model. The conduction electrons transfer angular momentum to the Bloch wall with 100% efficiency in the absence of pinning. The wall…

Strongly Correlated Electrons · Physics 2007-05-23 S. E. Barnes , S. Maekawa

Ferroelectric nitrides have emerged as promising semiconductor materials for modern electronics. However, their domain structures and associated properties are basically unknown, despite their potential to result in optimized or new…

Materials Science · Physics 2024-08-06 Zhijun Jiang , Zhenlong Zhang , Charles Paillard , Hongjun Xiang , Laurent Bellaiche

The control of domain walls or spin textures is crucial for spintronic applications of antiferromagnets. Despite many efforts, it has been challenging to directly visualize antiferromagnetic domains or domain walls with nanoscale…

Materials Science · Physics 2020-03-06 Paul M. Sass , Wenbo Ge , Jiaqiang Yan , D. Obeysekera , J. J Yang , Weida Wu

We demonstrate a unique prospect for inducing anisotropic vortex pinning and manipulating the directional motion of vortices using the stripe domain patterns of a uniaxial magnetic film in a the superconducting/ferromagnetic hybrid. Our…

Superconductivity · Physics 2009-11-13 V. Vlasko-Vlasov , U. Welp , G. Karapetrov , V. Novosad , A. Belkin , D. Rosenmann , M. Iavarone , W. -K. Kwok

We discuss the influence of disorder on domain structure formation in ferromagnetic phase of diluted magnetic semiconductors (DMS) of p-type. Using analytical arguments we show the existence of critical ratio $\nu_{\rm {cr}}$ of…

Materials Science · Physics 2007-05-23 V. A. Stephanovich

We report in plane magnetization measurements on Nb/Co bilayers using a thin superconductor Nb$\sim25$ nm and a thick ferromagnet Co$\sim40-55$ nm where Bloch Domain Walls (BDW) are energetically favorable. Here sharp drops in the…

Superconductivity · Physics 2019-01-21 Edgar J. Patino , M. G. Blamire

The effect of morphologic factors on magnetic flux dynamics and critical currents in percolative superconducting structures is considered. The superconductor contains the fractal clusters of a normal phase, which act as pinning centers. The…

Superconductivity · Physics 2009-11-07 Yuriy I. Kuzmin

We investigate the effect of an inhomogeneous exchange field on the proximity effect in superconductor-ferromagnet hybrid structures within the quasi-classical theory of superconductivity. As an example we study the proximity effect in a…

Superconductivity · Physics 2007-05-23 T. Champel , M. Eschrig

Ferroelectric domain walls exhibit a range of interesting electrical properties and are now widely recognized as functional two-dimensional systems for the development of next-generation nanoelectronics. A major achievement in the field was…

Materials Science · Physics 2021-09-17 Jan Schultheiß , Tadej Rojac , Dennis Meier

We consider superconductivity nucleation in multiply connected mesoscopic samples such as thin-walled cylinders or rings placed in electrical contact with a ferromagnet. The superconducting critical temperature and order parameter structure…

Superconductivity · Physics 2009-11-29 A. V. Samokhvalov , A. S. Mel'nikov , A. I. Buzdin

We study electron transport through a domain wall in a ferromagnetic nanowire subject to spin-dependent scattering. A scattering matrix formalism is developed to address both coherent and incoherent transport properties. The coherent case…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Peter E. Falloon , Rodolfo A. Jalabert , Dietmar Weinmann , Robert L. Stamps

Momentum transfer from incoming magnons to a Bloch domain wall is calculated using one dimensional continuum micromagnetic analysis. Due to the confinement of the wall in space, the dispersion relation of magnons is different from that of a…

Mesoscale and Nanoscale Physics · Physics 2018-01-16 D. Wang , Xi-guang Wang , Guang-hua Guo

We consider the effect of magnetic impurities, modeled by classical spins, in a conventional superconductor. We study their effect on the quasiparticles, specifically on the spin density and local density of states (LDOS). As previously…

Superconductivity · Physics 2009-11-13 P. D. Sacramento , V. K. Dugaev , V. R. Vieira

In this paper we discuss once more the zero mode contribution to the vacuum energy density. We show that a careful treatment of the zero modes leads to the conclusion that domain walls may be ferromagnetic, and could generate a magnetic…

Astrophysics · Physics 2009-11-07 P. Cea , L. Tedesco

We consider spin polarized transport in a ferromagnet-insulator/semiconductor/insulator-ferromagnet (F1-I-S-I-F2) junction. We find that the spin current is strongly dependent on the spin configurations, the doping and space charge…

Mesoscale and Nanoscale Physics · Physics 2010-06-22 Yue Yu , Jinbin Li , S. T. Chui

Charged polar interfaces such as charged ferroelectric domain walls or heterostructured interfaces of ZnO/(Zn,Mg)O and LaAlO3/SrTiO3, across which the normal component of electric polarization changes suddenly, can host large…

Materials Science · Physics 2016-06-06 F. -T. Huang , F. Xue , B. Gao , L. H. Wang , X. Luo , W. Cai , X. Lu , J. M. Rondinelli , L. Q. Chen , S. -W. Cheong

Domains in BaTiO$_3$ induces a regular modulation of uniaxial magnetic anisotropy in CoFeB via an inverse magnetostriction effect. As a result, the domain structures of the CoFeB wedge film and BaTiO$_3$ substrate correlate fully and…

The motion of magnetic domain walls in ultrathin magnetic heterostructures driven by current via the spin Hall torque is described. We show results from perpendicularly magnetized CoFeB|MgO heterostructures with various heavy metal…

Materials Science · Physics 2015-03-26 Jacob Torrejon , Masamitsu Hayashi

We study transport in the presence of magnetic domain walls (DWs) in a lattice model of ferromagnetic type-I Weyl metals. We compute the diagonal and Hall conductivities in the presence of a DW, using both Kubo and Landauer formalisms, and…

Mesoscale and Nanoscale Physics · Physics 2021-03-19 Sopheak Sorn , Arun Paramekanti