By intercalating protons into van der Waals ferromagnet Cr1.2Te2 nanoflakes, a gaggle of researchers efficiently induced a room-temperature magnetic part transition from ferromagnetism to antiferromagnetism.
The collaboration concerned professors from the Excessive Magnetic Discipline Laboratory at Hefei Institutes of Bodily Science, Chinese language Academy of Sciences (CAS), Hefei College of Expertise, South China College of Expertise and College of Science and Expertise of China.
The analysis was just lately revealed on Bodily Evaluate Letters.
Controlling the path of magnetization in two-dimensional ferromagnets is important for creating super-compact, non-volatile spintronic gadgets. In conventional spintronic gadgets, the path of magnetization can often be switched by an area magnetic subject induced by present or by spin switch torque. Nonetheless, the excessive provider density in van der Waals itinerant ferromagnets is tough to tune, which has hindered progress on this space.
On this analysis, the researchers fabricated high-quality single crystals and located that Cr1.2Te2 nanoflakes exfoliated from these crystals exhibited square-shape hysteresis loops at room temperature, confirming their excessive sensible worth.
Additional research discovered that at T=200 Ok, the magnetism in a 40 nm thick Cr1.2Te2 nanoflake exhibited a non-monotonic evolution towards the gate voltage. Particularly, with the anomalous Corridor resistivity first growing after which lowering.
When the electron doping focus ne=3.8×1021cm-3 at Vg=-14 V, the anomalous Corridor resistivity disappeared, revealing a potential magnetic part transition.
Theoretical evaluation confirmed that the electron-type doping might be achieved in proton-intercalated Cr1.2Te2, and a magnetic part transition from FM to AFM might be realized with a essential doping focus of round 1021cm-3, which is in line with their experimental observations.
This FM-to-AFM part transition in a van der Waals magnet at room temperature may result in improved spintronic gadgets, in accordance with the crew.
Cheng Tan et al, Room-Temperature Magnetic Part Transition in an Electrically Tuned van der Waals Ferromagnet, Bodily Evaluate Letters (2023). DOI: 10.1103/PhysRevLett.131.166703
Chinese language Academy of Sciences
Gate induced room-temperature magnetic part transition realized in van der Waals ferromagnet nanoflakes (2023, November 7)
retrieved 7 November 2023
This doc is topic to copyright. Aside from any truthful dealing for the aim of personal research or analysis, no
half could also be reproduced with out the written permission. The content material is supplied for data functions solely.