研究目的
Investigating the synthesis and properties of thin ferroelectric and magnetostrictive layers for composite multiferroics.
研究成果
PVDF polymer and Fe10Ni90 alloy are suitable materials for composite multiferroics, with their properties in film state dependent on synthesis technology. Annealing PVDF films increases the concentration of the polar phase and crystallinity. Fe10Ni90 films thicker than 80 nm are preferable for composite structures due to their magnetic anisotropy and magnetostriction properties. Experimental samples of PVDF/Fe10Ni90 nanocomposites were successfully synthesized and certified for magnetic properties.
研究不足
The study is limited by the thickness range of the films investigated (40-100 nm for Fe10Ni90 and ~200 nm for PVDF) and the specific conditions of heat treatment applied to the PVDF films. The effect of substrate on the properties of the films was noted but not fully explored.
1：Experimental Design and Method Selection:
The study involved the synthesis of thin ferroelectric (PVDF) and magnetostrictive (Fe10Ni90) layers. PVDF films were obtained by spin-coating, and Fe10Ni90 films were prepared by ion-plasma sputtering.
2：Sample Selection and Data Sources:
Fe10Ni90 films of varying thicknesses (40-100 nm) and PVDF films of ~200 nm thickness were used.
3：List of Experimental Equipment and Materials:
Equipment included a LakeShore 7407 vibrating sample magnetometer, Evicomagnetics Kerr magnetometer, Dektak-150 stylus profilometer, and differential scanning calorimetry (DSC). Materials included PVDF polymer and Fe10Ni90 alloy.
4：Experimental Procedures and Operational Workflow:
Magnetic properties were measured using VSM and Kerr magnetometer. PVDF films' crystallinity and phase composition were analyzed using IR spectroscopy, Raman spectroscopy, and DSC.
5：Data Analysis Methods:
The phase composition of PVDF films was estimated using IR spectra analysis. Magnetostriction constant was determined indirectly through magnetoresistance measurements under elastic strain.
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