Related Experiment Video
Updated: Aug 9, 2025
09:06
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
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Even-Odd-Layer-Dependent Ferromagnetism in 2D Non-van-der-Waals CrCuSe2
Jing Peng1, Yueqi Su1, Haifeng Lv1,2
1School of Chemistry and Materials Sciences, CAS Center for Excellence in Nanoscience, and CAS Key Laboratory of Mechanical Behavior and Design of Materials, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), University of Science and Technology of China. Hefei, Hefei, 230026, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|February 16, 2023
Summary
A new 2D ferromagnetic material, CuCrSe2, shows layer-dependent magnetic properties. Even-layer nanosheets exhibit enhanced magnetic ordering and the anomalous Hall effect, unlike odd-layer samples.
Area of Science:
- Materials Science
- Condensed Matter Physics
- 2D Materials
Background:
- Van der Waals (vdW) layered materials with strong magnetocrystalline anisotropy are crucial for 2D magnetism.
- Interlayer coupling significantly influences magnetism in atomic-thickness materials.
- Understanding layer-dependent magnetic phenomena is key for novel electronic applications.
Purpose of the Study:
- To report a new non-vdW 2D ferromagnetic material, CuCrSe2 nanosheets.
- To investigate the even-odd layer-dependent ferromagnetism in CuCrSe2.
- To elucidate the mechanism behind the observed layer-dependent magnetic coupling.
Main Methods:
- Fabrication of CuCrSe2 nanosheets from an antiferromagnetic bulk.
- Experimental characterization of magnetic properties, including Hall effect measurements.
- Theoretical calculations (e.g., density functional theory) to understand electronic structure and magnetic coupling.
Main Results:
- Monolayer and even-layer CuCrSe2 exhibit ferromagnetism with ordering temperatures above 125 K.
- Anomalous Hall effect observed in even-layer CuCrSe2, indicating robust magnetic order.
- Odd-layer CuCrSe2 samples display a linear Hall effect.
- Theoretical calculations reveal Cu-induced orbital shifts and broken centrosymmetry as the cause of layer-dependent magnetism.
Conclusions:
- CuCrSe2 is a novel 2D ferromagnetic material with unique even-odd layer-dependent magnetic behavior.
- The findings highlight exotic magnetic properties in layered materials beyond weak interlayer interactions.
- This discovery opens new avenues for exploring 2D magnetism and spintronic devices.
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