Related Experiment Video
Updated: May 9, 2026
07:42
Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
Published on: July 20, 2022
XAFS in dilute magnetic semiconductors
Zhihu Sun1, Wensheng Yan, Tao Yao
1National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China. sqwei@ustc.edu.cn.
Dalton Transactions (Cambridge, England : 2003)
|July 26, 2013
Summary
X-Ray absorption fine structure (XAFS) spectroscopy is a powerful tool for characterizing dilute magnetic semiconductors (DMS). This review details XAFS principles and applications for analyzing atomic and electronic structures in DMS materials.
Area of Science:
- Condensed matter physics
- Materials science
- Spectroscopy
Background:
- X-Ray absorption fine structure (XAFS) spectroscopy has advanced significantly over four decades.
- XAFS is a powerful technique for characterizing local environments in condensed matter.
Purpose of the Study:
- To review the applications of XAFS in studying the atomic and electronic structure of dilute magnetic semiconductors (DMS).
- To provide an overview of XAFS principles, including theory, data analysis, and experimental aspects.
Main Methods:
- Detailed introduction to XAFS theory, data analysis, and experimental procedures.
- Review of selected examples showcasing XAFS applications in DMS systems.
Main Results:
- XAFS effectively determines dopant site occupation and distribution in DMS.
- XAFS detects metal clusters, secondary phases, defect types, and dopant valence in DMS.
- Demonstrates the capability of XAFS in characterizing complex DMS materials.
Conclusions:
- XAFS is a versatile and powerful technique for the characterization of dilute magnetic semiconductors.
- This review serves as a valuable resource for researchers new to DMS and the broader scientific community involved in DMS research.
More Related Videos
Related Concept Videos
02:42Valence Bond Theory
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...
01:31Ferromagnetism
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...
03:02Colors and Magnetism
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
01:26Diamagnetism
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets.