Velocity asymmetry of Dzyaloshinskii domain walls in the creep and flow regimes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F15%3APU115489" target="_blank" >RIV/00216305:26210/15:PU115489 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/0953-8984/27/32/326002" target="_blank" >http://dx.doi.org/10.1088/0953-8984/27/32/326002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0953-8984/27/32/326002" target="_blank" >10.1088/0953-8984/27/32/326002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Velocity asymmetry of Dzyaloshinskii domain walls in the creep and flow regimes

Popis výsledku v původním jazyce

We have carried out measurements of domain wall dynamics in a Pt/Co/GdOx(t) wedge sample with perpendicular magnetic anisotropy. When driven by an easy-axis field Hz in the presence of an in-plane field Hx, the domain wall propagation is different along ±x, as expected for samples presenting Dzyaloshinskii–Moriya (DMI) interaction. In the creep regime, the sign and the value of the domain wall velocity asymmetry changes along the wedge. We show that in our samples the domain wall speed versus Hx curves in the creep regime cannot be explained simply in terms of the variation of the domain wall energy with Hx, as suggested by previous works. For this reason the strength and the sign of the DMI cannot be extracted from these measurements. To obtain reliable information on the DMI strength using magnetic field-induced domain wall dynamics, measurements have been performed with high fields, bringing the DW close to the flow regime of propagation. In this case we find large values of the DMI, consistent in magnitude and sign with those obtained from Brillouin light scattering measurements.

Název v anglickém jazyce

Velocity asymmetry of Dzyaloshinskii domain walls in the creep and flow regimes

Popis výsledku anglicky

We have carried out measurements of domain wall dynamics in a Pt/Co/GdOx(t) wedge sample with perpendicular magnetic anisotropy. When driven by an easy-axis field Hz in the presence of an in-plane field Hx, the domain wall propagation is different along ±x, as expected for samples presenting Dzyaloshinskii–Moriya (DMI) interaction. In the creep regime, the sign and the value of the domain wall velocity asymmetry changes along the wedge. We show that in our samples the domain wall speed versus Hx curves in the creep regime cannot be explained simply in terms of the variation of the domain wall energy with Hx, as suggested by previous works. For this reason the strength and the sign of the DMI cannot be extracted from these measurements. To obtain reliable information on the DMI strength using magnetic field-induced domain wall dynamics, measurements have been performed with high fields, bringing the DW close to the flow regime of propagation. In this case we find large values of the DMI, consistent in magnitude and sign with those obtained from Brillouin light scattering measurements.

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

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Journal of Physics: Condensed Matter

ISSN

0953-8984

e-ISSN

1361-648X

Svazek periodika

27

Číslo periodika v rámci svazku

32

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

„326002-1“-„326002-8“

Kód UT WoS článku

000358596400015

EID výsledku v databázi Scopus

2-s2.0-84938149416