Scale-Enhanced Magnetism in Exfoliated Atomically Thin Magnetite Sheets

Anand B. Puthirath, Sharmila N. Shirodkar, Guanhui Gao, Francisco C.Robles Hernandez, Liangzi Deng, Rabin Dahal, Amey Apte, Gelu Costin, Nithya Chakingal, Aravind Puthirath Balan, Lucas M. Sassi, Chandra Sekhar Tiwary, Robert Vajtai, Ching Wu Chu, Boris I. Yakobson, Pulickel M. Ajayan

研究成果: Article同行評審

7 引文 斯高帕斯(Scopus)

摘要

The discovery of ferromagnetism in atomically thin layers at room temperature widens the prospects of 2D materials for device applications. Recently, two independent experiments demonstrated magnetic ordering in two dissimilar 2D systems, CrI3 and Cr2Ge2Te6, at low temperatures and in VSe2 at room temperature, but observation of intrinsic room-temperature magnetism in 2D materials is still a challenge. Here a transition at room temperature that increases the magnetization in magnetite while thinning down the bulk material to a few atom-thick sheets is reported. DC magnetization measurements prove ferrimagnetic ordering with increased magnetization and density functional theory calculations ascribe their origin to the low dimensionality of the magnetite layers. In addition, surface energy calculations for different cleavage planes in passivated magnetite crystal agree with the experimental observations of obtaining 2D sheets from non-van der Waals crystals.

原文English
文章編號2004208
期刊Small
16
發行號45
DOIs
出版狀態Published - 2020 11月 12

All Science Journal Classification (ASJC) codes

  • 生物技術
  • 生物材料
  • 化學 (全部)
  • 材料科學(全部)

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