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Title: Large perpendicular magnetic anisotropy of single Co atom on MgO monolayer: A first-principles study

Realizing the magnetic bit with a single atom is the ultimate goal for magnetic storage. Based on density functional theory, the magnetic anisotropy (MA) of single Co atom on MgO monolayer has been investigated. Results show that this two dimensional system possesses a large perpendicular MA, about 5.8 meV per Co atom. Besides, there exists remarkable unquenched orbital moments for different magnetization directions, which can be attributed to the reduction of coordination number in two dimensional system and is responsible for the enhanced MA. The Bloch pseudo-wavefunction and band structure of Co d-orbitals have been calculated to elucidate the origin of the perpendicular MA.
Authors:
;  [1] ;  [2] ;  [3]
  1. Department of Physics and State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084 (China)
  2. School of Physics, Nankai University, Tianjin 300071 (China)
  3. College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071 (China)
Publication Date:
OSTI Identifier:
22409951
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; ATOMS; COBALT; COORDINATION NUMBER; DENSITY FUNCTIONAL METHOD; MAGNESIUM OXIDES; MAGNETIZATION; TWO-DIMENSIONAL SYSTEMS; WAVE FUNCTIONS