Electric field control of magnetic properties offers a broad and promising toolbox for enabling ultra-low power electronics. A key challenge with high technological relevance is to master the interplay between the magnetic anisotropy of a ferromagnet and the exchange coupling to an adjacent antiferromagnet. Here, we demonstrate that magneto-ionic gating can be used to achieve a very stable out-of-plane (OOP) oriented magnetization with strong exchange bias in samples with as-deposited preferred in-plane (IP) magnetization. We show that the perpendicular interfacial anisotropy can be increased by more than a factor 2 in the stack Ta/Pt/PtMn/Co/HfO2 by applying −2.5 V gate voltage over 3 nm HfO2, causing a reorientation of the magnetization from IP to OOP with a strong OOP exchange bias of more than 50 mT. Comparing two thicknesses of PtMn, we identify a notable trade-off: while thicker PtMn yields a significantly larger exchange bias, it also results in a slower response to ionic liquid gating within the accessible gate voltage window. These results pave the way for post-deposition electrical tailoring of magnetic anisotropy and exchange bias in samples requiring significant exchange bias.
REFERENCES
1.
International Energy Agency
, see https://www.iea.org/reports/digitalisation-and-energy for “
Digitalization and energy
” (2017
).2.
L.
Belkhir
and
A.
Elmeligi
, “
Assessing ICT global emissions footprint: Trends to 2040 & recommendations
,” J. Clean. Prod.
177
, 448
–463
(2018
).3.
M.
Weisheit
,
S.
Fähler
,
A.
Marty
,
Y.
Souche
,
C.
Poinsignon
, and
D.
Givord
, “
Electric field-induced modification of magnetism in thin-film ferromagnets
,” Science
315
(5810
), 349
–351
(2007
).4.
F.
Matsukura
,
Y.
Tokura
, and
H.
Ohno
, “
Control of magnetism by electric fields
,” Nat. Nanotechnol.
10
(3
), 209
–220
(2015
).5.
C.
Song
,
B.
Cui
,
F.
Li
,
X.
Zhou
, and
F.
Pan
, “
Recent progress in voltage control of magnetism: Materials, mechanisms, and performance
,” Prog. Mater. Sci.
87
, 33
–82
(2017
).6.
A.
Molinari
,
H.
Hahn
, and
R.
Kruk
, “
Voltage-control of magnetism in all-solid-state and solid/liquid magnetoelectric composites
,” Adv. Mater.
31
(26
), 1806662
(2019
).7.
J.
Grollier
,
D.
Querlioz
,
K. Y.
Camsari
,
K.
Everschor-Sitte
,
S.
Fukami
, and
M. D.
Stiles
, “
Neuromorphic spintronics
,” Nat. Electron.
3
(7
), 360
–370
(2020
).8.
B.
Dieny
,
I. L.
Prejbeanu
,
K.
Garello
,
P.
Gambardella
,
P.
Freitas
,
R.
Lehndorff
,
W.
Raberg
,
U.
Ebels
,
S. O.
Demokritov
,
J.
Akerman
,
A.
Deac
,
P.
Pirro
,
C.
Adelmann
,
A.
Anane
,
A. V.
Chumak
,
A.
Hirohata
,
S.
Mangin
,
S. O.
Valenzuela
,
M. C.
Onbaşlı
,
M.
d'Aquino
,
G.
Prenat
,
G.
Finocchio
,
L.
Lopez-Diaz
,
R.
Chantrell
,
O.
Chubykalo-Fesenko
, and
P.
Bortolotti
, “
Opportunities and challenges for spintronics in the microelectronics industry
,” Nat. Electron.
3
(8
), 446
–459
(2020
).9.
M.
Ameziane
,
R.
Mansell
,
V.
Havu
,
P.
Rinke
, and
S.
van Dijken
, “
Lithium-ion battery technology for voltage control of perpendicular magnetization
,” Adv. Funct. Mater.
32
(29
), 2113118
(2022
).10.
U.
Bauer
,
L.
Yao
,
A. J.
Tan
,
P.
Agrawal
,
S.
Emori
,
H. L.
Tuller
,
S.
van Dijken
, and
G. S. D.
Beach
, “
Magneto-ionic control of interfacial magnetism
,” Nat. Mater.
14
(2
), 174
–181
(2015
).11.
J.
Zehner
,
D.
Wolf
,
M. U.
Hasan
,
M.
Huang
,
D.
Bono
,
K.
Nielsch
,
K.
Leistner
, and
G. S. D.
Beach
, “
Magnetoionic control of perpendicular exchange bias
,” Phys. Rev. Mater.
5
(6
), L061401
(2021
).12.
M. U.
Hasan
,
A. E.
Kossak
, and
G. S. D.
Beach
, “
Large exchange bias enhancement and control of ferromagnetic energy landscape by solid-state hydrogen gating
,” Nat. Commun.
14
(1
), 8510
(2023
).13.
L.
Herrera Diez
,
Y. T.
Liu
,
D. A.
Gilbert
,
M.
Belmeguenai
,
J.
Vogel
,
S.
Pizzini
,
E.
Martinez
,
A.
Lamperti
,
J. B.
Mohammedi
,
A.
Laborieux
,
Y.
Roussigné
,
A. J.
Grutter
,
E.
Arenholtz
,
P.
Quarterman
,
B.
Maranville
,
S.
Ono
,
M. S. E.
Hadri
,
R.
Tolley
,
E. E.
Fullerton
,
L.
Sanchez-Tejerina
,
A.
Stashkevich
,
S. M.
Chérif
,
A. D.
Kent
,
D.
Querlioz
,
J.
Langer
,
B.
Ocker
, and
D.
Ravelosona
, “
Nonvolatile ionic modification of the Dzyaloshinskii-Moriya interaction
,” Phys. Rev. Appl.
12
(3
), 034005
(2019
).14.
J.
Zehner
,
I.
Soldatov
,
S.
Schneider
,
R.
Heller
,
N. B.
Khojasteh
,
S.
Schiemenz
,
S.
Fähler
,
K.
Nielsch
,
R.
Schäfer
, and
K.
Leistner
, “
Voltage-controlled deblocking of magnetization reversal in thin films by tunable domain wall interactions and pinning sites
,” Adv. Electron. Mater.
6
(11
), 2000406
(2020
).15.
C.
Balan
,
J.
Peña Garcia
,
A.
Fassatoui
,
J.
Vogel
,
D.
de
,
S.
Chaves
,
M.
Bonfim
,
J.-P.
Rueff
,
L.
Ranno
, and
S.
Pizzini
, “
Tuning the dynamics of chiral domain walls of ferrimagnetic films by magnetoionic effects
,” Phys. Rev. Appl.
18
(3
), 034065
(2022
).16.
J.
Nogués
and
I. K.
Schuller
, “
Exchange bias
,” J. Magn. Magn. Mater.
192
(2
), 203
–232
(1999
).17.
A.
van den Brink
,
G.
Vermijs
,
A.
Solignac
,
J.
Koo
,
J. T.
Kohlhepp
,
H. J. M.
Swagten
, and
B.
Koopmans
, “
Field-free magnetization reversal by spin-Hall effect and exchange bias
,” Nat. Commun.
7
(1
), 10854
(2016
).18.
A.
Ehresmann
,
D.
Lengemann
,
T.
Weis
,
A.
Albrecht
,
J.
Langfahl-Klabes
,
F.
Göllner
, and
D.
Engel
, “
Asymmetric magnetization reversal of stripe-patterned exchange bias layer systems for controlled magnetic particle transport
,” Adv. Mater.
23
(46
), 5568
–5573
(2011
).19.
Y.
Wang
,
X.
Zhou
,
C.
Song
,
Y.
Yan
,
S.
Zhou
,
G.
Wang
,
C.
Chen
,
F.
Zeng
, and
F.
Pan
, “
Electrical control of the exchange spring in antiferromagnetic metals
,” Adv. Mater.
27
(20
), 3196
–3201
(2015
).20.
M.
Wang
,
M.
Li
,
Y.
Lu
,
X.
Xu
, and
Y.
Jiang
, “
Electric field controlled perpendicular exchange bias in Ta/Pt/Co/IrMn/Pt heterostructure
,” Appl. Phys. Lett.
123
(12
), 122405
(2023
).21.
J.
Zehner
,
R.
Huhnstock
,
S.
Oswald
,
U.
Wolff
,
I.
Soldatov
,
A.
Ehresmann
,
K.
Nielsch
,
D.
Holzinger
, and
K.
Leistner
, “
Nonvolatile electric control of exchange bias by a redox transformation of the ferromagnetic layer
,” Adv. Electron. Mater.
5
(6
), 1900296
(2019
).22.
Z.
Mustafa
,
D.
Pravarthana
,
B.
Wang
,
H.
Yang
, and
R.-W.
Li
, “
Manipulation of exchange bias effect via all-solid-state Li-ion redox capacitor with antiferromagnetic electrode
,” Phys. Rev. Appl.
14
(1
), 014062
(2020
).23.
C. J.
Jensen
,
A.
Quintana
,
P.
Quarterman
,
A. J.
Grutter
,
P. P.
Balakrishnan
,
H.
Zhang
,
A. V.
Davydov
,
X.
Zhang
, and
K.
Liu
, “
Nitrogen-based magneto-ionic manipulation of exchange bias in CoFe/MnN heterostructures
,” ACS Nano
17
(7
), 6745
–6753
(2023
).24.
G. W.
Anderson
,
Y.
Huai
, and
M.
Pakala
, “
Spin-valve thermal stability: The effect of different antiferromagnets
,” J. Appl. Phys.
87
(9
), 5726
–5728
(2000
).25.
Y. K.
Kim
,
S.-R.
Lee
,
S. A.
Song
,
G.-S.
Park
,
H. S.
Yang
, and
K.-I.
Min
, “
Magnetoresistance and interlayer diffusion in PtMn spin valves upon postdeposition annealing
,” J. Appl. Phys.
89
(11
), 6907
–6909
(2001
).26.
A. B.
Mukhopadhyay
,
C. B.
Musgrave
, and
J. Fdez.
Sanz
, “
Atomic layer deposition of hafnium oxide from hafnium chloride and water
,” J. Am. Chem. Soc.
130
(36
), 11996
–12006
(2008
).27.
B.
Dieny
and
M.
Chshiev
, “
Perpendicular magnetic anisotropy at transition metal/oxide interfaces and applications
,” Rev. Mod. Phys.
89
(2
), 025008
(2017
).28.
R.
Pachat
,
D.
Ourdani
,
J. W.
van der Jagt
,
M.-A.
Syskaki
,
A.
Di Pietro
,
Y.
Roussigné
,
S.
Ono
,
M. S.
Gabor
,
M.
Chérif
,
G.
Durin
,
J.
Langer
,
M.
Belmeguenai
,
D.
Ravelosona
, and
L. H.
Diez
, “
Multiple magnetoionic regimes in Ta/Co20Fe60B/HfO2
,” Phys. Rev. Appl.
15
(6
), 064055
(2021
).29.
30.
H. X.
Yang
,
M.
Chshiev
,
B.
Dieny
,
J. H.
Lee
,
A.
Manchon
, and
K. H.
Shin
, “
First-principles investigation of the very large perpendicular magnetic anisotropy at Fe|MgO and Co|MgO interfaces
,” Phys. Rev. B
84
(5
), 054401
(2011
).31.
R.
Pachat
,
D.
Ourdani
,
M.-A.
Syskaki
,
A.
Lamperti
,
S.
Roy
,
S.
Chen
,
A. D.
Pietro
,
L.
Largeau
,
R.
Juge
,
M.
Massouras
,
C.
Balan
,
J. W.
van der Jagt
,
G.
Agnus
,
Y.
Roussigné
,
M.
Gabor
,
S. M.
Chérif
,
G.
Durin
,
S.
Ono
,
J.
Langer
,
D.
Querlioz
,
D.
Ravelosona
,
M.
Belmeguenai
, and
L.
Herrera Diez
, “
Magneto-ionics in annealed W/CoFeB/HfO2 thin films
,” Adv. Mater. Interfaces
9
(36
), 2200690
(2022
).32.
B.
Bednarz
,
M.-A.
Syskaki
,
R.
Pachat
,
L.
Prädel
,
M.
Wortmann
,
T.
Kuschel
,
S.
Ono
,
M.
Kläui
,
L.
Herrera Diez
, and
G.
Jakob
(2024
). “Stabilizing perpendicular magnetic anisotropy with strong exchange bias in PtMn/Co by magneto-ionics,” Dataset, Zenodo
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