研究目的
Investigating the magnetic and magnetodielectric properties of highly strained Bi(Fe0.5Mn0.5)O3 thin films for potential applications in spintronics and magnonics.
研究成果
The study demonstrates that highly strained Bi(Fe0.5Mn0.5)O3 thin films exhibit strong room-temperature magnetic response, low Gilbert damping, and above room-temperature magnetodielectric coupling. These properties make BFMO a promising material for spintronic and magnonic applications, offering new perspectives for electric-field-controlled magnetic properties.
研究不足
The study is limited by the inaccessibility of temperatures above 300 K for certain measurements, and the exact origin of the observed magnetization in BFMO remains complex to determine. The role of oxygen vacancies in magnetic properties is still unclear.
1：Experimental Design and Method Selection:
Epitaxial Bi(Fe0.5Mn0.5)O3 thin films were deposited by pulsed-laser deposition (PLD) on SrTiO3(001) substrates. The films were characterized structurally, magnetically, and dielectrically to explore their multifunctional properties.
2：5Mn5)O3 thin films were deposited by pulsed-laser deposition (PLD) on SrTiO3(001) substrates. The films were characterized structurally, magnetically, and dielectrically to explore their multifunctional properties.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Thin films approximately 43 nm thick were grown on SrTiO3(001) substrates for magnetic measurements and Nb(
3：5%):
SrTiO3(001) for dielectric measurements.
4：List of Experimental Equipment and Materials:
KrF excimer laser (248 nm) for PLD, SQUID magnetometer for magnetic measurements, vector network analyzer ferromagnetic resonance (VNA FMR) for magnetization dynamics, impedance analyzer for dielectric measurements.
5：Experimental Procedures and Operational Workflow:
Films were deposited at 650°C under specific oxygen pressure, ablation rate, and laser fluency. Structural characterization was performed using XRD, HR TEM, and XPS. Magnetic and dielectric properties were measured under varying conditions.
6：Data Analysis Methods:
Magnetic data were analyzed using Kittel’s dispersion relation. Dielectric data were analyzed using impedance spectroscopy and modeled with equivalent circuits to extract intrinsic properties.
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