Journal
2D MATERIALS
Volume 4, Issue 4, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2053-1583/aa8a2b
Keywords
transition metal dichalcogenide; intercalated material; ferromagnetism; van der Waals heterostructure; tunnel magnetoresistance
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Funding
- CREST, Japan Science and Technology Agency (JST) [JPMJCR15F3]
- JSPS KAKENHI [JP25107003, JP25107004, JP26248061, JP15H01010, JP15K17433, JP16H00982]
- Murata Science Foundation
- Grants-in-Aid for Scientific Research [16H00982, 25107003] Funding Source: KAKEN
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Ferromagnetic van der Waals (vdW) materials are in demand for spintronic devices with all-two-dimensional-materials heterostructures. Here, we demonstrate mechanical exfoliation of magnetic-atom-intercalated transition metal dichalcogenide Cr1/3TaS2 from its bulk crystal; previously such intercalated materials were thought difficult to exfoliate. Magnetotransport in exfoliated tens-of-nanometres-thick flakes revealed ferromagnetic ordering below its Curie temperature T-C similar to 110 K as well as strong in-plane magnetic anisotropy; these are identical to its bulk properties. Further, van der Waals heterostructure assembly of Cr1/3TaS2 with another intercalated ferromagnet Fe1/4TaS2 is demonstrated using a dry-transfer method. The fabricated heterojunction composed of Cr1/3TaS2 and Fe1/4TaS2 with a native Ta2O5 oxide tunnel barrier in between exhibits tunnel magnetoresistance (TMR), revealing possible spin injection and detection with these exfoliatable ferromagnetic materials through the vdW junction.
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