研究目的
Investigating the magnetic and electronic properties of Cd1-xZnxCr2Se4 spinels for potential applications in spintronics.
研究成果
The study demonstrates that Cd1-xZnxCr2Se4 spinels maintain a half-metallic state with 100% spin polarization for the composition range 0.125 ≤ x ≤ 0.55, indicating potential for spintronic applications. The competition between ferromagnetic and antiferromagnetic interactions was highlighted, with ferromagnetism remaining dominant in the studied range.
研究不足
The study is limited to the composition range 0.35 ≤ x ≤ 0.55 for experimental samples and 0 ≤ x ≤ 0.5 for theoretical calculations. The magnetic field was applied up to 15 T, and measurements were conducted within a temperature range of 4.2 - 147 K.
1：Experimental Design and Method Selection:
The study involved both experimental and theoretical approaches to investigate the magnetic and electronic properties of Cd1-xZnxCr2Se4 spinels. The experimental part included magnetization measurements under magnetic fields up to 15 T, while the theoretical part utilized ab-initio calculations based on density functional theory (DFT) using the Full Potential Augmented Plane Wave (FP-LAPW) method.
2：Sample Selection and Data Sources:
Cd1-xZnxCr2Se4 single crystals were prepared by vapor liquid transport (VLT) technique and characterized for their magnetic properties.
3：List of Experimental Equipment and Materials:
Magnetization measurements were performed using an external applied field up to 15 T, with a water-cooled Bitter magnet used to produce the magnetic field.
4：Experimental Procedures and Operational Workflow:
The magnetization measurements were conducted in the temperature window
5：2 - 147 K using the extraction method. Data Analysis Methods:
The data were analyzed to determine the total magnetic moment, Curie temperature, lattice parameter, and exchange integrals, with ab-initio calculations used to study the electronic structure.
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