Researchers reveal proximity-induced electrical transport properties of Pt/CrI₃ heterostructure

Credit: Applied Surface Science (2024). DOI: 10.1016/j.apsusc.2024.161394
Two-dimensional magnetic materials have significant application potential in spin switches and memory devices. It is becoming increasingly important to design innovative device architectures and investigate their electrical transmission properties.
Recently, researchers from Hefei Institute of Physical Sciences, Chinese Academy of Sciences (HFIPS) and collaborators from Henan University studied the electrical transport properties of Pt/CrI3 heterostructures. The study is published in the journal Applied Surface Science.
The research team fabricated high-quality CrI3 single crystals using chemical vapor deposition and constructed a Pt/CrI3 heterostructure using micro-nano processing technology.
They also investigated the interaction between magnetic and electronic transport properties within this structure.
Their study showed that the Pt film exhibits an anomalous Hall effect when in contact with CrI3 nanosheets, indicating that the film acquires ferromagnetism through the magnetic proximity effect.
Moreover, the gradual weakening of the anomalous Hall effect with increasing temperature suggests that the magnetization of the Pt layer is mainly due to the proximity effect.
As the thickness of the Pt layer increases, the anomalous Hall resistance decreases, further confirming that the magnetization of the Pt film is mainly affected by interfacial effects, the researchers found.
The researchers also observed that the coercive force and saturation resistance of the Pt layer decreased with increasing applied current. First-principles calculations suggest that a hybrid orbital is formed at the interface of the Pt/CrI3 heterostructure, and the Fermi level of Pt is largely split, resulting in an uneven spin density distribution and the generation of a magnetic moment. .
“These findings demonstrate precise control of electron exchange interactions at interfaces and have important implications for the design of innovative spintronic devices,” said HFIPS, one of the study’s corresponding authors. said Han Yuyan, an associate researcher at.
Further information: Xinlin Zheng et al, Proximity-induced ferromagnetism in platinum thin films on magnetically insulating CrI3 nanoflakes, Applied Surface Science (2024). DOI: 10.1016/j.apsusc.2024.161394
Provided by Chinese Academy of Sciences
Citation: Researchers Announce Proximity-Induced Electrical Transport Properties of Pt/CrI₃ Heterostructures (November 8, 2024), https://phys.org/news/2024-11-unveil-proximity-electrical-properties Retrieved November 8, 2024 from -ptcri. html
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