Nonequilibrium dynamics in a spin valve with noncollinear magnetization

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00564304" target="_blank" >RIV/68378271:_____/22:00564304 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/22:10450917

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevB.106.144435" target="_blank" >https://doi.org/10.1103/PhysRevB.106.144435</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.106.144435" target="_blank" >10.1103/PhysRevB.106.144435</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nonequilibrium dynamics in a spin valve with noncollinear magnetization

Popis výsledku v původním jazyce

We utilize a hybrid quantum-classical equation of motion approach to investigate the spin dynamics and spin-transfer torque in a spin valve under bias voltage. We show that the interplay between localized classical magnetic moments and conduction electrons induces a complex effective exchange coupling between the magnetic layers. This leads to a declination of magnetizations from layers' anisotropy axes even in equilibrium. Introducing a finite bias voltage triggers spin currents and related spin-transfer torques which further tilt the magnetizations and govern the relaxation processes of the spin dynamics. We show that symmetric and asymmetric voltage drops can lead to relaxation times of the spin dynamics that differ by several orders of magnitude at comparable charge currents. In both cases, we observe resonant features, where the relaxation is boosted whenever the chemical potential of the leads matches the maxima in the density of the states of the spin-valve electrons.

Název v anglickém jazyce

Nonequilibrium dynamics in a spin valve with noncollinear magnetization

Popis výsledku anglicky

We utilize a hybrid quantum-classical equation of motion approach to investigate the spin dynamics and spin-transfer torque in a spin valve under bias voltage. We show that the interplay between localized classical magnetic moments and conduction electrons induces a complex effective exchange coupling between the magnetic layers. This leads to a declination of magnetizations from layers' anisotropy axes even in equilibrium. Introducing a finite bias voltage triggers spin currents and related spin-transfer torques which further tilt the magnetizations and govern the relaxation processes of the spin dynamics. We show that symmetric and asymmetric voltage drops can lead to relaxation times of the spin dynamics that differ by several orders of magnitude at comparable charge currents. In both cases, we observe resonant features, where the relaxation is boosted whenever the chemical potential of the leads matches the maxima in the density of the states of the spin-valve electrons.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/GA22-22419S" target="_blank" >GA22-22419S: Molekulární spintronika: řízení spin-orbitálních polí</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review B

ISSN

2469-9950

e-ISSN

2469-9969

Svazek periodika

106

Číslo periodika v rámci svazku

14

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

144435

Kód UT WoS článku

000880197300003

EID výsledku v databázi Scopus

2-s2.0-85141505328