Related Experiment Video
Updated: Apr 12, 2026
09:34
Synthesis and Characterization of Fe-doped Aluminosilicate Nanotubes with Enhanced Electron Conductive Properties
Published on: November 15, 2016
9.7K
Half-metallicity induced by boron adsorption on an Fe3O4(100) surface
1Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences, School of Physical Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China. sunx@ustc.edu.cn.
Physical Chemistry Chemical Physics : PCCP
|May 27, 2015
Summary
Boron (B) adsorption enhances spin polarization on magnetite (Fe3O4) surfaces by inducing half-metallicity. This surface modification improves spin injection efficiency for spintronic devices.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Surface Science
Background:
- Surface spin polarization of magnetite (Fe3O4) is crucial for spintronics but is significantly reduced.
- Low surface spin polarization hinders the development of Fe3O4-based spintronic devices.
Purpose of the Study:
- To enhance the surface spin polarization of Fe3O4(100).
- To investigate the effect of boron (B) atom adsorption on Fe3O4(100) surface properties.
Main Methods:
- Density Functional Theory (DFT) calculations were employed.
- Investigated bulk-terminated and cation-redistributed Fe3O4(100) surfaces with adsorbed B atoms.
Main Results:
- Boron adsorption opens a band gap in spin-up electronic states on the Fe3O4(100) surface.
- Strong bonding between B and surface oxygen atoms induces half-metallicity.
- Adsorbed B atoms exhibit nearly 100% spin-polarized electronic states at the Fermi level.
Conclusions:
- Boron adsorption effectively enhances surface spin polarization in Fe3O4.
- Induced half-metallicity and spin-polarized states at the Fermi level offer potential for improved spin injection in spintronic applications.
More Related Videos
Related Concept Videos
02:32Bonding in Metals
56.8K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
56.8K
01:31Ferromagnetism
3.6K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
3.6K
01:27Biasing of Metal-Semiconductor Junctions
845
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
845
03:24Hybridization of Atomic Orbitals I
69.6K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
69.6K
02:42Valence Bond Theory
11.7K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.7K
02:51Metal-Ligand Bonds
25.7K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
25.7K