Publication detail
Current-induced motion and pinning of domain walls in spin-valve nanowires studied by XMCD-PEEM
UHLÍŘ, V. PIZZINI, S. ROUGEMAILLE, N. NOVOTNÝ, J. CROS, V. JIMÉNEZ, E. FAINI, G. HEYNE, L. SIROTTI, F. TIEG, C. BENDOUNAN, A. MACCHEROZZI, F. BELKHOU, R. GROLLIER, J. ANANE, A. VOGEL, J.
Czech title
Proudem indukovaný pohyb a zachycení doménových stěn v nanodrátech na bázi spinového ventilu zkoumaných metodou XMCD-PEEM
English title
Current-induced motion and pinning of domain walls in spin-valve nanowires studied by XMCD-PEEM
Type
journal article - other
Language
en
Original abstract
Very large average velocities, up to 600 m/s, have been found for domain-wall motion driven by 3-ns-long pulses of electric current in zero magnetic field in the NiFe layer of 200-nm-wide NiFe/Cu/Co nanowires. For longer pulses, the domain-wall motion is strongly hindered by pinning potentials. Dipolar interactions between the NiFe and Co layers caused by anisotropy inhomogeneities have been identified as the most important among the different potential sources of DW pinning. The domain-wall velocities increase with current density, but a substantial drop is observed at current densities above 4.1011 A/m2.
Czech abstract
Článek se zabývá proudem indukovaným pohybem doménových stěn a jejich zachycením na defektech v nanodrátech na bázi spinového ventilu NiFe/Cu/Co. Výzkum byl proveden metodou XMCD-PEEM. Ve vrstvě NiFe byly pozorovány vysoké rychlosti doménových stěn, až 600 m/s, vyvolaných pulzy elektrického proudu o délce 3 ns v nulovém magnetickém poli. Během delších pulzů byly doménové stěny silně zachycovány v potenciálových jámách podél nanodrátu. Ty jsou zejména vyvolány dipolární interakcí mezi NiFe and Co vrstvami, což je způsobeno defekty v homogenitě magnetokrystalické anizotropie ve vrstvě Co. Rychlosti doménových stěn se zvyšují s proudovou hustotou, ale při hodnotách nad 4.1011 A/m2 dochází k jejich výraznému poklesu.
English abstract
Very large average velocities, up to 600 m/s, have been found for domain-wall motion driven by 3-ns-long pulses of electric current in zero magnetic field in the NiFe layer of 200-nm-wide NiFe/Cu/Co nanowires. For longer pulses, the domain-wall motion is strongly hindered by pinning potentials. Dipolar interactions between the NiFe and Co layers caused by anisotropy inhomogeneities have been identified as the most important among the different potential sources of DW pinning. The domain-wall velocities increase with current density, but a substantial drop is observed at current densities above 4.1011 A/m2.
Keywords in Czech
Doménová stěna; Spintronika, Spinový ventil, XMCD-PEEM
Keywords in English
Domaim wall; Spintronics, Spin-valve, XMCD-PEEM
RIV year
2010
Released
11.06.2010
ISSN
1098-0121
Volume
81
Number
22
Pages from–to
224418-1–224418-10
Pages count
10
BIBTEX
@article{BUT47125,
author="Vojtěch {Uhlíř} and Stefania {Pizzini} and Nicolas {Rougemaille} and Jan {Novotný} and Vincent {Cros} and Erika {Jiménez} and Giancarlo {Faini} and L. {Heyne} and F. {Sirotti} and Carsten {Tieg} and A. {Bendounan} and F. {Maccherozzi} and R. {Belkhou} and J. {Grollier} and A. {Anane} and Jan {Vogel},
title="Current-induced motion and pinning of domain walls in spin-valve nanowires studied by XMCD-PEEM",
year="2010",
volume="81",
number="22",
month="June",
pages="224418-1--224418-10",
issn="1098-0121"
}