研究目的
Investigating the proximity effects of spin-orbit coupling in EuO1?x films capped with a Pt overlayer and the unusual enhancement of magnetic anisotropy resulting from strong spin-orbit coupling across the Pt/EuO1?x interface.
研究成果
The study found an unusual enhancement of magnetic anisotropy at the Pt/EuO interface, attributed to strong spin-orbit coupling. This suggests the presence of a 2D spin-polarized midgap state at the interface, supported by recent theoretical calculations.
研究不足
The study is limited by the granular nature of the Pt film and the potential presence of impure phases at the interface, which could affect the observed properties. The exact mechanism behind the enhanced magnetic anisotropy at the interface requires further investigation.
1：Experimental Design and Method Selection:
The study involved the deposition of EuO1?x films on a Si (001) substrate using pulsed laser deposition (PLD), followed by the deposition of a Pt overlayer. The magnetic and transport properties of the films were then analyzed.
2：Sample Selection and Data Sources:
The samples were prepared by depositing EuO1?x films on Si (001) substrates, with a Pt overlayer. The properties were verified using x-ray diffraction (XRD) and magnetometry.
3：List of Experimental Equipment and Materials:
A Nd:YAG laser with 266 nm wavelength and energy of 320 mJ/pulse was used for PLD. The substrate was heated at 350 ?C under a base pressure better than 2 × 10?6 Pa.
4：Experimental Procedures and Operational Workflow:
The EuO1?x films were deposited using PLD, followed by in situ deposition of a Pt layer. The films were then cooled at 10 ?C/min. Transport measurements were performed using a Quantum Design PPMS system.
5：Data Analysis Methods:
The data were analyzed to understand the magnetic and transport properties, including the temperature dependence of resistivity and magnetoresistance.
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