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We study a triplet spin valve obtained by intercalating a triplet superconductor spacer between two ferromagnetic regions with non-collinear magnetizations. We demonstrate that the magnetoresitance of the triplet spin valve depends on the…

Mesoscale and Nanoscale Physics · Physics 2013-12-02 F. Romeo , R. Citro

Recently, the possibility of exploiting the phenomenon of spin transition (ST) has been intensively investigated, therefore, it is particularly important to study the behavior of ST under various stimuli. Here, the shape and content of the…

We report on electrical spin injection measurements on MWNTs . We use a ferromagnetic alloy Pd$_{1-x}$Ni$_{x}$ with x $\approx$ 0.7 which allows to obtain devices with resistances as low as 5.6 $k\Omega$ at 300 $K$. The yield of device…

Mesoscale and Nanoscale Physics · Physics 2016-08-16 S. Sahoo , T. Kontos , C. Schönenberger , C. Sürgers

We theoretically study the transport properties of a supramolecular spin valve, consisting of a carbon nanotube with two attached magnetic molecules, weakly coupled to metallic contacts. The emphasis is put on analyzing the change of the…

Mesoscale and Nanoscale Physics · Physics 2019-03-19 A. Plominska , I. Weymann

We show that in suitable anisotropic ferromagnets, both stable and metastable ``tilted'' phases occur, in which the magnetization ${\vec M}$ makes an angle between zero and $180$ degrees with the externally applied ${\vec H}$. Tuning either…

Statistical Mechanics · Physics 2010-08-03 Leiming Chen , John Toner

In this work, and by means of micromagnetic simulations, we study the magnetic properties of toroidal nanomagnets. The magnetization ground state for different values of the aspect ratio between the toroidal and polar radii of the nanotorus…

Mesoscale and Nanoscale Physics · Physics 2016-08-03 Smiljan Vojkovic , Álvaro S. Núñez , Dora Altbir , Vagson L. Carvalho-Santos

Magnetic thin films with perpendicular magnetic anisotropy (PMA) have localized excitations that correspond to reversed dynamically precessing magnetic moments, known as magnetic droplet solitons. Fundamentally, these excitations are…

Materials Science · Physics 2015-04-08 Ferran Macià , Dirk Backes , Andrew D. Kent

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

Magnetic remanence - found in bar magnets or magnetic storage devices - is probably the oldest and most ubiquitous phenomenon underpinning technological applications of magnetism. It is a macroscopic non-equilibrium phenomenon: a remanent…

We experimentally compare two types of interface structures with magnetic and non-magnetic Weyl semimetals. They are the junctions between a gold normal layer and magnetic Weyl semimetal Ti$_2$MnAl, and a ferromagnetic nickel layer and…

Mesoscale and Nanoscale Physics · Physics 2020-04-28 V. D. Esin , D. N. Borisenko , N. N. Kolesnikov , E. V. Deviatov

We present an experimental and theoretical study of the low-field dynamics of current-driven vortex oscillations in nanocontacts based on spin-valve multilayers. These oscillations appear as low-frequency (250-500 MHz) excitations in the…

Materials Science · Physics 2015-05-13 M. van Kampen , L. Lagae , G. Hrkac , T. Schrefl , Joo-Von Kim , T. Devolder , C. Chappert

We study the competition of magneto-dipole, anisotropy and exchange interactions in composite three dimensional multiferroics. Using Monte Carlo simulations we show that magneto-dipole interaction does not suppress the ferromagnetic state…

Mesoscale and Nanoscale Physics · Physics 2015-05-22 A. M. Belemuk , O. G. Udalov , N. M. Chtchelkatchev , I. S. Beloborodov

The spin-valve complex magnetoimpedance of symmetric ferromagnet/normal metal/ferromagnet junctions is investigated within the drift-diffusion (standard) model of spin injection. The ac magnetoresistance---the real part difference of the…

Other Condensed Matter · Physics 2011-12-01 Denis Kochan , Martin Gmitra , Jaroslav Fabian

Bi$_{2}$Te$_{2.4}$Se$_{0.6}$ single crystals show gapless topological surface states and doping ($x$) with Vanadium allows to shift the chemical potential in the bulk band gap. Accordingly, the resistivity, carrier density, and mobility are…

Mesoscale and Nanoscale Physics · Physics 2024-05-06 Birkan Düzel , Christian Riha , Karl Graser , Olivio Chiatti , Saskia F. Fischer

Surface states of three-dimensional topological insulators exhibit the phenomenon of spin-momentum locking, whereby the orientation of an electron spin is determined by its momentum. Probing the spin texture of these states is of critical…

Mesoscale and Nanoscale Physics · Physics 2018-07-10 Pan He , Steven S. -L. Zhang , Dapeng Zhu , Yang Liu , Yi Wang , Jiawei Yu , Giovanni Vignale , Hyunsoo Yang

Spin-dependent transport phenomena due to relativistic spin-orbit coupling and broken space-inversion symmetry are often difficult to interpret microscopically, in particular when occurring at surfaces or interfaces. Here we present a…

Mesoscale and Nanoscale Physics · Physics 2021-09-01 J. Železný , Z. Fang , K. Olejník , J. Patchett , F. Gerhard , C. Gould , L. W. Molenkamp , C. Gomez-Olivella , J. Zemen , T. Tichý , T. Jungwirth , C. Ciccarelli

The magnetostatic interaction between two ferromagnetic microwires is calculated as a function of their geometric parameters and compared with those measured through magnetic hysteresis loops of glass-coated amorphous Fe%…

Mesoscale and Nanoscale Physics · Physics 2011-06-09 A. Pereira , J. C. Denardin , J. Escrig

Inverse magnetoresistance has been observed in magnetic tunnel junctions with pinhole nanocontacts over a broad temperature range. The tunnel magnetoresistance undergoes a change of sign at higher bias and temperature. This phenomenon is…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Soumik Mukhopadhyay , I. Das

We report a new manifestation of first-order magnetic transitions in two-dimensional electron systems. This phenomenon occurs in aluminum arsenide quantum wells with sufficiently low carrier densities and appears as a set of hysteretic…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 E. P. De Poortere , E. Tutuc , S. J. Papadakis , M. Shayegan

The stationary Josephson effect is studied theoretically in the situation when there is externally injected transport supercurrent which flows in the banks parallel to the contact interface. Coexistence of this supercurrent with the order…

Superconductivity · Physics 2015-06-25 A. N. Omelyanchouk , S. N. Shevchenko , Yu. A. Kolesnichenko
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