研究目的
To study the properties of La1.85Sr0.15CuO4/La0.7Sr0.3MnO3 hybrid nanowire networks prepared by electrospinning, focusing on their microstructure, magnetic properties, and magnetoresistance effects.
研究成果
The LSMO/LSCO hybrid nanowire network samples exhibit a large number of interfaces enabling current flow through the sample. The magnetic and electric properties result from the competition between the ferromagnetic magnetoresistive LSMO component and the superconducting LSCO component. Despite the absence of obvious superconductivity, the LSCO component influences both the magnetic and electric properties of the hybrid sample.
研究不足
The study did not observe obvious superconductivity in the hybrid nanowire networks, which may be due to the high detection field used in the measurements. The competition between the ferromagnetic magnetoresistive LSMO component and the superconducting LSCO component complicates the interpretation of the results.
1：Experimental Design and Method Selection:
The hybrid nanowire networks were prepared by electrospinning, a technique that produces nanowire network fabrics. The study focused on the microstructure and physical properties of these networks.
2：Sample Selection and Data Sources:
The samples consisted of La1.85Sr0.15CuO4 and La0.7Sr0.3MnO3 nanowires. The microstructure was analyzed using SEM, TEM, and XRD. Magnetic and magnetoresistance properties were measured using a SQUID magnetometer and a bath cryostat.
3：85Sr15CuO4 and La7Sr3MnO3 nanowires. The microstructure was analyzed using SEM, TEM, and XRD. Magnetic and magnetoresistance properties were measured using a SQUID magnetometer and a bath cryostat.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: JEOL 7000 F SEM microscope, JEOL JSM-7000 F TEM microscope, RINT2200 X-ray powder diffractometer, Quantum Design MPMS3 SQUID magnetometer, Oxford Instruments Teslatron bath cryostat, Keithley source meter (model 2400), Keithley 2001 voltmeter.
4：Experimental Procedures and Operational Workflow:
The nanowires were prepared by electrospinning, followed by heat treatment and oxygenation. The microstructure was analyzed, and magnetic and magnetoresistance measurements were conducted.
5：Data Analysis Methods:
The grain size was estimated from TEM images and XRD patterns. Magnetization and resistance data were analyzed to determine the magnetic and magnetoresistance properties.
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