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The inhomogeneity of an electron spin ensemble as well as fluctuating environment acting upon individual spins drastically shorten the spin coherence time $T_2$ and hinder coherent spin manipulation. We show that this problem can be solved…

Mesoscale and Nanoscale Physics · Physics 2021-10-13 V. V. Belykh , A. R. Korotneva , D. R. Yakovlev

The problem of weak ferromagnetism in antiferromagnets due to canting of magnetic moments was treated using Green's function technique. At first the eigenvalues and eigenfunctions of the electronic Hamiltonian corresponding to collinear…

Strongly Correlated Electrons · Physics 2010-09-07 V. V. Mazurenko , V. I. Anisimov

We report a high frequency/high magnetic field electron spin resonance (HF-ESR) spectroscopy study in the sub-THz frequency domain of the two representatives of the family of magnetic topological insulators…

Strongly Correlated Electrons · Physics 2022-02-03 A. Alfonsov , K. Mehlawat , A. Zeugner , A. Isaeva , B. Büchner , V. Kataev

Ferrimagnets have the potential to play a key role in spintronics due to their high stability, low energy consumption, and rapid magnetic state switching. These characteristics are typically observed in ferrimagnetic materials near magnetic…

We assess the potential of the ferrimagnetic spinel ferrites CoFe2O4 and NiFe2O4 to act as spin filtering barriers in magnetic tunnel junctions. Our study is based on the electronic structure calculated by means of first-principles density…

Materials Science · Physics 2015-06-12 Nuala M. Caffrey , Daniel Fritsch , Thomas Archer , Stefano Sanvito , Claude Ederer

This paper presents experimental validation of the homogenized harmonic balance finite element method (HomHBFEM), which we have developed as a dedicated simulation technique for magnets with fast excitation cycles, in particular the fast…

Orbital angular momentum has recently emerged as an important carrier of angular momentum in solids, offering new pathways for spin orbitronic functionality beyond conventional spin transport. Here, we investigate the orbital Hall effect…

Mesoscale and Nanoscale Physics · Physics 2026-04-13 Abhishek Erram , Akanksha Chouhan , Ashwin A. Tulapurkar

Topological semimetals (TSs) are promising candidates for low-power spin-orbit torque (SOT) devices due to their large charge-to-spin conversion efficiency. Here, we investigated the charge-to-spin conversion efficiency of amorphous PtSn4…

Materials Science · Physics 2022-02-04 Jinming Liu , Yihong Fan , Delin Zhang , Onri J. Benally , Lakhan Bainsla , Thomas Peterson , Jian-Ping Wang

The neutron resonance spin echo (NRSE) technique has the potential to increase the Fourier time and energy resolution in neutron scattering by using radio-frequency (rf) neutron spin-flippers. However, aberrations arising from variations in…

Instrumentation and Detectors · Physics 2023-03-15 Stephen J. Kuhn , Sam McKay , Fankang Li , Robert M. Dalgliesh , Eric Dees , Kaleb Burrage , Jiazhou Shen , Roger Pynn

Spin fluctuations have a substantial influence on the electron and lattice behaviors in magnetic materials, which, however, is difficult to be tracked properly by prevalent first-principles methods. We propose a versatile self-adaptive…

Materials Science · Physics 2023-02-14 Zefeng Cai , Ke Wang , Yong Xu , Su-Huai Wei , Ben Xu

In this Comment, using Korringa-Kohn-Rostoker coherent-potential approximation method in the atomic-sphere approximation (KKR-ASA CPA) to describe the effects of disorder due to excess Fe in FeTe alloys, we show that (i) the rigid-band…

Superconductivity · Physics 2015-05-18 Prabhakar P. Singh

We investigate spin pumping phenomena in polycrystalline CoFeB/Pt and CoFeB/Ta bilayers and the correlation between the effective spin mixing conductance $g^{\uparrow\downarrow}_{\rm eff}$ and the obtained voltages generated by the…

Mesoscale and Nanoscale Physics · Physics 2017-05-24 A. Conca , B. Heinz , M. R. Schweizer , S. Keller , E. Th. Papaioannou , B. Hillebrands

Motivated by recent experiments on all-optical magnetization reversal in conductive ferromagnetic thin films we use nonequilibrium formalism to calculate the effective magnetic field induced in a Rashba ferromagnet by a short laser pulse.…

Mesoscale and Nanoscale Physics · Physics 2016-07-25 Alireza Qaiumzadeh , Mikhail Titov

Emphasis is given on the observation of a convergence to a critical value of the effective mass of a heavy fermion compound by tuning it through a quantum instability either by applying pressure or magnetic field from an antiferromagnetic…

Strongly Correlated Electrons · Physics 2015-05-18 J. Flouquet , D. Aoki , W. Knafo , G. Knebel , T. D. Matsuda , S. Raymond , C. Proust , C. Paulsen , P. Haen

We study spin-scattering asymmetry at the interface of two ferromagnets (FMs) based on a half-metallic Co$_{2}$Fe$_{0.4}$Mn$_{0.6}$Si (CFMS)/CoFe interface. First-principles ballistic transport calculations based on Landauer formula for…

Materials Science · Physics 2021-10-13 Y. Fujita , Y. Miura , T. Sasaki , T. Nakatani , K. Hono , Y. Sakuraba

In metallic ferromagnets, the spin-transfer torque and spin-motive force are known to exhibit a reciprocal relationship. Recent experiments on ferromagnets with strong spin-orbit coupling have revealed a rich complexity in the interaction…

Mesoscale and Nanoscale Physics · Physics 2015-06-12 Kjetil M. D. Hals , Arne Brataas

Radical pair recombination reactions are known to be sensitive to extremely weak magnetic fields, and can therefore be said to function as molecular magnetoreceptors. The classic example is a carotenoid-porphyrin-fullerene (C+PF-) radical…

Chemical Physics · Physics 2020-04-24 Lachlan P. Lindoy , Thomas P. Fay , David E. Manolopoulos

We discuss a series of thermodynamic, magnetic and electrical transport experiments on the two heavy fermion compounds CeNi2Ge2 and YbRh2Si2 in which magnetic fields, B, are used to tune the systems from a Non-Fermi liquid (NFL) into a…

Strongly Correlated Electrons · Physics 2007-05-23 P. Gegenwart , J. Custers , T. Tayama , K. Tenya , C. Geibel , G. Sparn , N. Harrison , P. Kerschl , D. Eckert , K. -H. Müller , F. Steglich

In semiconductor spintronic devices, the semiconductor is usually lightly doped and nondegenerate, and moderate electric fields can dominate the carrier motion. We recently derived a drift-diffusion equation for spin polarization in the…

Materials Science · Physics 2009-11-07 Z. G. Yu , M. E. Flatte

In the iron pnictide superconductors, theoretical calculations have consistently shown enhancements of the static magnetic susceptibility at both the stripe-type antiferromagnetic (AFM) and in-plane ferromagnetic (FM) wavevectors. However,…

Superconductivity · Physics 2015-10-28 P. Wiecki , B. Roy , D. C. Johnston , S. L. Bud'ko , P. C. Canfield , Y. Furukawa