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Title: Voltage control of magnetism in Fe3-xGeTe2/In2Se3 van der Waals ferromagnetic/ferroelectric heterostructures

Journal Article · · Nature Communications

Abstract We investigate the voltage control of magnetism in a van der Waals (vdW) heterostructure device consisting of two distinct vdW materials, the ferromagnetic Fe 3- x GeTe 2 and the ferroelectric In 2 Se 3 . It is observed that gate voltages applied to the Fe 3- x GeTe 2 /In 2 Se 3 heterostructure device modulate the magnetic properties of Fe 3- x GeTe 2 with significant decrease in coercive field for both positive and negative voltages. Raman spectroscopy on the heterostructure device shows voltage-dependent increase in the in-plane In 2 Se 3 and Fe 3- x GeTe 2 lattice constants for both voltage polarities. Thus, the voltage-dependent decrease in the Fe 3- x GeTe 2 coercive field, regardless of the gate voltage polarity, can be attributed to the presence of in-plane tensile strain. This is supported by density functional theory calculations showing tensile-strain-induced reduction of the magnetocrystalline anisotropy, which in turn decreases the coercive field. Our results demonstrate an effective method to realize low-power voltage-controlled vdW spintronic devices utilizing the magnetoelectric effect in vdW ferromagnetic/ferroelectric heterostructures.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Kyung Hee Univ., Seoul (Korea, Republic of)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Research Foundation of Korea (NRF); Ministry of Science and ICT (MIST)
Grant/Contract Number:
SC0012704; 2017R1A3B1023686; 2021R1C1C1009494; 2021R1A6A1A03043957; NRF-2021R1A2C2011007; NRF-2021M3H4A1A03054856; NRF-2020R1A5A1016518; NRF-2021R1A2C2014179; 2022R1A4A3030766; 2021R1A2C2093155
OSTI ID:
1999702
Alternate ID(s):
OSTI ID: 2284064
Report Number(s):
BNL-225261-2024-JAAM; 5605; PII: 41382
Journal Information:
Nature Communications, Journal Name: Nature Communications Vol. 14 Journal Issue: 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United Kingdom
Language:
English

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