Nanopartikel CoZnFe2O4 dengan struktur mixed spinel yang dienkapsulasi dengan PEG-4000 telah berhasil disintesis menggunakan metode kopresipitasi. Hasil analisis X-Ray diffraction (XRD) menunjukkan nanopartikel CoZnFe2O4 mempunyai karakteristik struktur spinel ferit dengan ukuran kristalit sebesar 14,4 ± 0,2 nm. Setelah dienkaspulasi dengan PEG-4000 ukuran kristalit sedikit menurun menjadi 9,7 ± 0,2 nm. Hasil analisis Fourier Transform Infrared (FTIR) untuk CoZnFe2O4 menunjukkan puncak serapan pada bilangan gelombang sekitar 401-563 cm-1 yang merupakan ikatan vibrasi M-O. Setelah dienkapsulasi dengan dengan PEG-4000 muncul vibrasi baru khas PEG yaitu C-O (1064 cm-1). Pada saat dienkapsulasi, ikatan M-O masih tetap muncul yang menandakan keberadaan nanopartikel CoZnFe2O4. Hasil Transmission Electron Microscopy (TEM) menunjukkan bahwa nanopartikel tampak mengalami aglomerasi. Setelah dienkapsulasi dengan PEG-4000 aglomerasi menjadi berkurang dan nanopartikel menjadi lebih terdispersi. Hasil analisis Vibrating Sample Magnetometer (VSM) menunjukkan nilai koersivitas CoZnFe2O4 adalah 251,9 Oe. Nilai koersivitas menurun menjadi 49,9 Oe setelah dienkapsulasi dengan PEG-4000. Hal ini disebabkan karena perubahan ukuran kristalit. Magnetisasi saturasi nanopartikel CoZnFe2O4 sebelum dienkapsulasi adalah 29,0 emu/g dan menurun setelah dienkapsulasi dengan PEG-4000 menjadi 19,7 emu/g. Hal ini disebabkan karena PEG bersifat paramagnetik dan nonmagnetik.

This study aims to provide new innovations in the use of Microsoft Power Point applications as interactive physics learning media on diode material. In addition, it motivates physics teachers to use technology in the implementation of learning in class. The target of this research is in the form of products resulting from the use of the Microsoft PowerPoint application as an interactive physics learning medium on diode material. This research method is research and development using a development model consisting of five stages, namely: (1) preliminary investigation; (2) design (3) realization/construction (realization/construction); (4) test, evaluation, and revision (test, evaluation, and revision); (5) implementation (implementation). The results of this study are the creation of interactive physics learning media through power point applications with the plomp model known as 5 stages, namely the initial investigation stage, design, realization/construction, test evaluation and revision and implementation. Power point interactive learning media is generally declared feasible to use after going through several trials carried out with material expert tests, media expert tests by looking at the results of the assessment of the two validators with a value obtained of 77.50 including the valid category for material experts and media experts obtaining a score of 78.46 is included in the valid category. It can also be seen that the effectiveness of learning media through the ability of student learning outcomes with a pretest score of 64.00 and a posttest score of 84.00 shows a significant increase in student learning outcomes.