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Title: Magneto-ionic control of magnetism using a solid-state proton pump

Journal Article · · Nature Materials

Voltage-gated ion transport as a means of manipulating magnetism electrically could enable ultralow-power memory, logic and sensor technologies. Earlier work made use of electric-field-driven O2– displacement to modulate magnetism in thin films by controlling interfacial or bulk oxidation states. However, elevated temperatures are required and chemical and structural changes lead to irreversibility and device degradation. Here we show reversible and non-destructive toggling of magnetic anisotropy at room temperature using a small gate voltage through H+ pumping in all-solid-state heterostructures. We achieve 90° magnetization switching by H+ insertion at a Co/GdOx interface, with no degradation in magnetic properties after >2,000 cycles. We then demonstrate reversible anisotropy gating by hydrogen loading in Pd/Co/Pd heterostructures, making metal–metal interfaces susceptible to voltage control. The hydrogen storage metals Pd and Pt are high spin–orbit coupling materials commonly used to generate perpendicular magnetic anisotropy, Dzyaloshinskii–Moriya interaction, and spin–orbit torques in ferromagnet/heavy-metal heterostructures. Furthermore, our work provides a platform for voltage-controlled spin–orbitronics.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1491150
Report Number(s):
BNL-210856-2019-JAAM
Journal Information:
Nature Materials, Vol. 18, Issue 1; ISSN 1476-1122
Publisher:
Springer Nature - Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 159 works
Citation information provided by
Web of Science

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Electric‐Field‐Controlled Antiferromagnetic Spintronic Devices journal March 2020
Ionic Modulation of Electrical Conductivity of ZnO Due to Ambient Moisture journal July 2019
Nanoionic Resistive‐Switching Devices journal November 2018
Voltage Control of Perpendicular Exchange Bias in Multiferroic Heterostructures journal May 2019
Nonvolatile Electric Control of Exchange Bias by a Redox Transformation of the Ferromagnetic Layer journal May 2019
Electrical Control of Perpendicular Magnetic Anisotropy and Spin‐Orbit Torque‐Induced Magnetization Switching journal November 2019
Magneto‐Ionic Switching of Superparamagnetism journal October 2019
Electric-field control of spin accumulation direction for spin-orbit torques journal January 2019
Voltage-gated optics and plasmonics enabled by solid-state proton pumping journal November 2019
Hydrogen finds a home in ionic devices journal December 2018
Reversible, Electric-Field Induced Magneto-Ionic Control of Magnetism in Mesoporous Cobalt Ferrite Thin Films journal July 2019
Electrolyte-gated magnetoelectric actuation: Phenomenology, materials, mechanisms, and prospective applications journal March 2019
Enhancement of spin–orbit torque via interfacial hydrogen and oxygen ion manipulation journal August 2019
Opportunities and challenges for magnetoelectric devices journal August 2019
Organismic materials for beyond von Neumann machines journal March 2020
Room-temperature electric field modulation of magnetization in a helimagnet journal October 2019
Intensity enhancement of ferromagnetic resonance modes in exchange coupled magnetic multilayers journal January 2020
Reversible control of Dzyaloshinskii-Moriya interaction at the graphene/Co interface via hydrogen absorption journal January 2020
Design of defect-chemical properties and device performance in memristive systems journal May 2020
Design of defect-chemical properties and device performance in memristive systems text January 2020
Emergent electric field control of phase transformation in oxide superlattices text January 2020