Element Specific Versus Integral Structural and Magnetic Properties of Co:ZnO and Gd:GaN Probed with Hard X-ray Absorption Spectroscopy
Abstract
:1. Introduction
2. Dilute Magnetic Semiconductors (DMS)
2.1. The Controversy about Co:ZnO DMS
2.1.1. Experimental Work
2.1.2. Theoretical Work
2.2. Gd:GaN-RT Ferromagnetism with Colossal Moments?
3. Experimental Techniques
3.1. Structural Properties
3.1.1. Integral Methods
3.1.2. Element-specific Methods
3.2. Magnetic Properties
3.2.1. Integral Methods
3.2.2. Element-specific Methods
4. Co-doped ZnO Epitaxial Films
4.1. Basic Structural Properties
4.2. Paramagnetic Co:ZnO Films
4.2.1. Typical XANES/XLD Signatures
4.2.2. SQUID Results
4.2.3. XMCD Results
4.2.4. EPR Results
4.2.5. Anisotropic Paramagnetism
4.2.6. Antiferromagnetic Co-O-Co Interaction
4.3. Superparamagnetic Co:ZnO Films
4.4. Magneto-transport Properties of PM/SPM Co:ZnO
4.5. Summary–Co:ZnO
5. Gd-doping of GaN Epitaxial Films
5.1. Fabrication of Gd-doped GaN
5.2. Structural Properties
5.3. Magnetic Properties
5.3.1. Integral Magnetometry
5.3.2. Gd Sublattice Magnetization
5.3.3. Magnetic Polarization of the GaN Host
5.4. Summary–Gd:GaN
6. Conclusions and Outlook
Acknowledgements
References
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Ney, A. Element Specific Versus Integral Structural and Magnetic Properties of Co:ZnO and Gd:GaN Probed with Hard X-ray Absorption Spectroscopy. Materials 2010, 3, 3565-3613. https://doi.org/10.3390/ma3063565
Ney A. Element Specific Versus Integral Structural and Magnetic Properties of Co:ZnO and Gd:GaN Probed with Hard X-ray Absorption Spectroscopy. Materials. 2010; 3(6):3565-3613. https://doi.org/10.3390/ma3063565
Chicago/Turabian StyleNey, Andreas. 2010. "Element Specific Versus Integral Structural and Magnetic Properties of Co:ZnO and Gd:GaN Probed with Hard X-ray Absorption Spectroscopy" Materials 3, no. 6: 3565-3613. https://doi.org/10.3390/ma3063565