Current-induced torques in structures with ultrathin IrMn antiferromagnets

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10313483" target="_blank" >RIV/00216208:11320/15:10313483 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevB.92.165424" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.92.165424</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.92.165424" target="_blank" >10.1103/PhysRevB.92.165424</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Current-induced torques in structures with ultrathin IrMn antiferromagnets

Popis výsledku v původním jazyce

We report measurements of current-induced magnetic torques in structures containing a similar to 1-nm-thick layer of an antiferromagnet IrMn. We perform ac-electrical measurements in Ta/IrMn/CoFeB and Ta/IrMn structures below and above the Neel temperature of the ultrathin IrMn and compare the results with control experiments in a Ta/CoFeB bilayer. We employ the second harmonics technique to detect current-induced effects and perform symmetry analysis that enables us to separate distinct contributions to the signal. We identify signals generated by a thermal gradient in the sample and signals originating from current-induced torques. In the Ta/CoFeB bilayer we observe a current-induced torque acting on CoFeB consistent with the sign and magnitude of the spin Hall effect in Ta. In the Ta/IrMn/CoFeB trilayer, the opposite sign of spin Hall angles in IrMn and Ta results in a strongly suppressed spin torque acting in CoFeB at high temperatures where IrMn is paramagnetic. In the low tempera

Název v anglickém jazyce

Current-induced torques in structures with ultrathin IrMn antiferromagnets

Popis výsledku anglicky

We report measurements of current-induced magnetic torques in structures containing a similar to 1-nm-thick layer of an antiferromagnet IrMn. We perform ac-electrical measurements in Ta/IrMn/CoFeB and Ta/IrMn structures below and above the Neel temperature of the ultrathin IrMn and compare the results with control experiments in a Ta/CoFeB bilayer. We employ the second harmonics technique to detect current-induced effects and perform symmetry analysis that enables us to separate distinct contributions to the signal. We identify signals generated by a thermal gradient in the sample and signals originating from current-induced torques. In the Ta/CoFeB bilayer we observe a current-induced torque acting on CoFeB consistent with the sign and magnitude of the spin Hall effect in Ta. In the Ta/IrMn/CoFeB trilayer, the opposite sign of spin Hall angles in IrMn and Ta results in a strongly suppressed spin torque acting in CoFeB at high temperatures where IrMn is paramagnetic. In the low tempera

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/GB14-37427G" target="_blank" >GB14-37427G: Centrum spintroniky</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Physical Review B - Condensed Matter and Materials Physics

ISSN

1098-0121

e-ISSN

—

Svazek periodika

92

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

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Kód UT WoS článku

000363013800005

EID výsledku v databázi Scopus

2-s2.0-84944790006