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All Journal Jurnal Pengabdian Magister Pendidikan IPA Newton-Maxwell Journal of Physics
Dian W. Kurniawidi
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Astronomy Earth & Planetary Sciences Education Electrical & Electronics Engineering Mechanical Engineering Physics

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Inisiasi Kemandirian Siswa MTs Nurul Islam Sekarbela Melalui Praktikum Kelistrikan dan Kemagnetan Untuk Mendukung Program Merdeka Belajar Dian W. Kurniawidi; Rohani Sayuti; Muh. Alfaris; Agus Wahid H; Susi Rahayu
Jurnal Pengabdian Magister Pendidikan IPA Vol 6 No 2 (2023): April-Juni
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v6i2.4462

Abstract

The learning process requires media to attract students' attention and curiosity about the lesson. The era of digitalization of technology and information has caused students to start leaving books behind, creating an egocentric attitude focused on themselves. Experiment activities in the laboratory are indicated to be able to initiate collaboration and communication skills, in addition to fostering student independence in learning. This program aims to improve students' competency in literacy and numeracy so that they are better prepared and more relevant to the times. The activity lasts for 3 days, the first and second days are for experiments, while the third day is discussion and evaluation. Experiment materials are electricity and magnetism as much as 5 topics. Based on the completed questionnaire, students understood the Seeback Effect and Magnetic Field Identification up to 96%, while the most difficult topics to understand was Generators and Transformers with an understanding percentage of 76% and Parallel Series Circuits by 88%.
Workshop Analisis Kristalografi Dengan Metode Rietveld Menggunakan Aplikasi X’Pert Highscore Ramadian Ridho Illahi; Arif Budianto; Zahrah Ramadlan Mubarokah; Dian W. Kurniawidi; Siti Alaa; Teguh Ardianto; Susi Rahayu
Jurnal Pengabdian Magister Pendidikan IPA Vol 6 No 2 (2023): April-Juni
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v6i2.4463

Abstract

Final year students are required to have the ability to innovate, be creative, have personality, and develop independence in seeking and finding knowledge through realities and field dynamics such as ability requirements, real problems, social interaction, collaboration, self-management, as well as performance demands and achievement targets. In order for students' hard skills and soft skills to be formed strongly, it is felt necessary to provide additional skills, especially those that support the completion of the Final Project. Workshops on the use of the Originlab are quite urgent in research so as to speed up the completion of the Final Project (Thesis) for students interested in Materials. This software is commonly used to prepare XRD, FT-IR, UV-Vis and other spectra that are quite important in materials. In this explanation, a brief description of the XRD data preparation steps is described, starting from data input to quantitative and qualitative data analysis. Data analysis was carried out including determining the value of particle size, FWHM, crystal structure and lattice strain. Workshop participants totaled 20 students and were held for 7 days, from 7 to 15 May 2023 with details of 2 days offline, 1 day online via G-Meet and 4 days of mentoring.
Optical Property Enhancement in Cobalt Doped Magnetite Nanoparticles Evaluated with UV Vis Tauc and Urbach Saputra, Kormil; Ika Umratul Asni Aminy; Rahmatun Inayah; Teguh Ardianto; Dian W. Kurniawidi
Newton-Maxwell Journal of Physics Vol. 6 No. 2: Oktober 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/nmj.v6i2.44047

Abstract

Magnetite (Fe3O4) is a spinel-based material that has broad potential in various applications, one of which is for magneto-optics. However, the value of the energy gap obtained from magnetite is too small to be applied. Efforts to improve these characteristics are carried out through transition metal ion doping techniques, one of which is cobalt (Co2+) which is known to modify the electronic structure and stabilize the crystal lattice. This study aims to analyze the optical properties of magnetite nanoparticles that have been doped with Co2+ through energy gap and Urbach energy calculations. The synthesis of Co0.125Fe2.875O4 was carried out using the coprecipitation method. Furthermore, characterization was carried out using UV–Vis spectroscopy and analyzed the size of the energy gap and Urbach energy. The results showed that cobalt doping (Co0.125Fe2.875O4) produced two indirect energy gap values ​​of 2.07 eV and 3.19 eV and one direct energy gap value of 3.63 eV. Urbach energy analysis revealed a very low Eu value of 0.0073 eV, indicating high crystal regularity and minimal structural defects in the material. This study demonstrated that cobalt doping not only increases the band gap energy of magnetite but also significantly lowers the Urbach energy, resulting in a material with more pronounced optical properties.
Co-Authors Agus Wahid H Alaa, Siti Arif Budianto Ika Umratul Asni Aminy Kormil Saputra Muh. Alfaris Rahmatun Inayah Ramadian Ridho Illahi Rohani Sayuti Susi Rahayu Teguh Ardianto, Teguh Zahrah Ramadlan Mubarokah