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The ferromagnetic resonance frequencies are obtained for a thin ferromagnetic film with surface anisotropy for the cases when the external magnetic field is applied perpendicularly or parallel to the film surface, and for various…

Mesoscale and Nanoscale Physics · Physics 2018-12-05 N. A. Usov

Recent theoretical and experimental attemps have been successful in finding magnetic Weyl semimetal phases, which show both nodal-point structure in the electronic bands and magnetic orders. Beyond uniform ferromagnetic or antiferromagnetic…

Mesoscale and Nanoscale Physics · Physics 2019-10-18 Yasufumi Araki

Antiferromagnetic Kagome semimetals have attracted tremendous attentions for their potential application in antiferromagnetic topological spintronics. Effectively manipulating Kagome antiferromagnetic states could reveal abundant physical…

Characteristic results of magnetism in small particles and thin films are presented. As a consequence of the reduced atomic coordination in small clusters and thin films the electronic states and density of states modify. Thus magnetic…

Mesoscale and Nanoscale Physics · Physics 2015-05-14 K. H. Bennemann

The dependence of tunneling conductance and tunneling magnetoresistance (TMR) on barrier thickness in magnetic tunnel junctions is theoretically investigated. The complex band structure of the insulator is taken into account, and an…

Mesoscale and Nanoscale Physics · Physics 2024-08-30 B. C. Lee

Magnetic tunnel junctions (MTJs), composed of two ferromagnetic electrodes separated by a thin insulating barrier layer, are currently used in spintronic devices, such as magnetic sensors and magnetic random access memories. Recently,…

We investigate the tunneling magnetoresistance in magnetic tunnel junctions (MTJs) comprised of Weyl semimetal contacts. We show that chirality-magnetization locking leads to a gigantic tunneling magnetoresistance ratio, an effect that does…

Mesoscale and Nanoscale Physics · Physics 2021-07-07 D. J. P. de Sousa , C. O. Ascencio , P. M. Haney , J. P. Wang , Tony Low

We study the tunnel magnetoresistance (TMR) effect and magnetocrystalline anisotropy in a series of magnetic tunnel junctions (MTJs) with $L1_1$-ordered fcc ferromagnetic alloys and MgO barrier along the [111] direction. Considering the…

Materials Science · Physics 2021-02-24 Keisuke Masuda , Hiroyoshi Itoh , Yoshiaki Sonobe , Hiroaki Sukegawa , Seiji Mitani , Yoshio Miura

We study theoretically the charge transport pumped by magnetization dynamics through epitaxial FIF and FNIF magnetic tunnel junctions (F: Ferromagnet, I: Insulator, N: Normal metal). We predict a small but measurable DC pumping voltage…

Materials Science · Physics 2009-11-13 Jiang Xiao , Gerrit E. W. Bauer , Arne Brataas

Results of theoretical study of spin-polarized tunneling in ferromagnet/superconductor junctions are presented. Spin and charge currents are calculated as a function of applied voltage and spin polarization in a ferromagnet. The model takes…

Superconductivity · Physics 2009-10-31 A. A. Golubov

We study tunneling in ferromagnet/unconventional superconductor (F/S) junctions. We include the effects of spin polarization, interfacial resistance, and Fermi wavevector mismatch (FWM) between the F and S regions. Andreev reflection (AR)…

Superconductivity · Physics 2009-10-31 Igor Zutic , Oriol T. Valls

The electronic structure and spin-dependent tunneling in epitaxial Fe/MgO/Fe(001) tunnel junctions are studied using first-principles calculations. For small MgO barrier thickness the minority-spin resonant bands at the two interfaces make…

Materials Science · Physics 2007-08-16 K. D. Belashchenko , J. Velev , E. Y. Tsymbal

A new class of phenomena discussed in this review is based on interaction between spatially separated, but closely located ferromagnets and superconductors. They are called Ferromagnet-Superconductor Hybrids (FSH). These systems include…

Materials Science · Physics 2015-06-24 I. F. Lyuksyutov , V. L. Pokrovsky

In this work, we demonstrate that the interaction of electromagnetic waves with a microstructured material formed by metallic wires connected to a metallic surface can be described using homogenization methods provided an additional…

Materials Science · Physics 2009-11-13 Mario G. Silveirinha , Carlos A. Fernandes , Jorge R. Costa

The behavior of a uniformly magnetized ferronematic slab is investigated numerically in a situation in which an external magnetic field is applied parallel and antiparallel, respectively, to its initial magnetization direction. The employed…

Soft Condensed Matter · Physics 2018-09-10 Grigorii Zarubin , Markus Bier , Siegfried Dietrich

We theoretically investigated Anomalous Hall Effect (AHE) and Spin Hall Effect (SHE) transversally to the insulating spacer O, in magnetic tunnel junctions of the form F/O/F where F are ferromagnetic layers and O represents a tunnel…

Mesoscale and Nanoscale Physics · Physics 2012-09-14 A. Vedyayev , N. Ryzhanova , N. Strelkov , B. Dieny

We consider a new type of magnetic tunnel junction, which consists of two ferromagnetic tunnel barriers acting as spin filters (SFs), separated by a nonmagnetic metal (NM) layer. Using the transfer matrix method and the free-electron…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 Alireza Saffarzadeh

We consider an effect of a strong magnetic field on the ground state and macroscopic coherent tunneling in small antiferromagnetic particles with uniaxial and biaxial single-ion anisotropy. We find several tunneling regimes that depend on…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 B. A. Ivanov , V. E. Kireev

The interplay between the electron transport in metal/ferroelectric/metal junctions with ultrathin ferroelectric barriers and the polarization state of a barrier is investigated. Using a model which takes into account screening of…

Other Condensed Matter · Physics 2009-11-11 M. Ye. Zhuravlev , R. F. Sabirianov , S. S. Jaswal , E. Y. Tsymbal

We calculate the tunneling magnetoresistance (TMR) of Fe|ZnSe|Fe|ZnSe|Fe (001) double magnetic tunnel junctions as a function of the in-between Fe layer's thickness, and compare these results with those of Fe|ZnSe|Fe simple junctions. The…

Materials Science · Physics 2013-05-29 Jeronimo Peralta Ramos , Ana Maria Llois
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