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Magnetoresistance anomaly in Fe5GeTe2 homo-junctions induced by its intrinsic transition.
- Source :
- Nano Research; Jul2023, Vol. 16 Issue 7, p10443-10450, 8p
- Publication Year :
- 2023
-
Abstract
- Two-dimensional van der Waals (2D vdW) magnets have attracted great attention recently and possess the unprecedented advantages of incorporating high-quality vdW heterostructures and homostructures into spintronic devices, and exploring various physical phenomena or technologies. Among them, Fe<subscript>5</subscript>GeTe<subscript>2</subscript> (F5GT) has ferromagnetic order close to room temperature, however the magnetic properties near its intrinsic transitions and F5GT-based 2D devices remain mostly unexplored. Here, we systematically demonstrate the peculiar magnetic properties of Fe<subscript>5</subscript>GeTe<subscript>2</subscript> nanoflakes near its intrinsic transition temperature (T<subscript>p</subscript>) which is far lower than its Curie temperature (T<subscript>C</subscript>) of ∼ 265 K, and firstly discover anomalous magnetoresistance effect in F5GT homo-junctions by magneto-transport measurements. The strongest anomalous Hall effect occurs around T<subscript>p</subscript> which is located in a temperature range from 130 to 160 K for the F5GT nanoflakes with different thicknesses. Furthermore, negative magnetoresistance (N-MR) and butterfly-shaped magnetoresistance (B-MR) are observed in F5GT homo-junction devices, and they appeared only in an intermediate temperature range from 110 to 160 K, noticeably showing the maxima near the T<subscript>p</subscript> rather than the lowest temperature. Our experimental results clearly reveal the significant influence of intrinsic transitions on magnetic properties of F5GT and magnetoresistance effect in F5GT homo-junction devices, which imply a new strategy to achieve high-performance 2D spintronic devices by tuning intrinsic magnetic or structural transitions in 2D vdW magnets. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19980124
- Volume :
- 16
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Nano Research
- Publication Type :
- Academic Journal
- Accession number :
- 169750739
- Full Text :
- https://doi.org/10.1007/s12274-023-5609-y