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All Journal JPSE (Journal of Physical Science and Engineering) Science and Technology Indonesia KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Indonesian Physical Review Dedikasi: Jurnal Pengabdian Masyarakat Jurnal Teras Fisika : Teori, Modeling, dan Aplikasi Fisika Newton-Maxwell Journal of Physics Jurnal Pengabdian Inovasi Masyarakat Indonesia Narra X Classroom Experiences Socio-Economic and Humanistic Aspects for Township and Industry Asskruie Frontier Advances in Applied Science and Engineering Education Specialist Media for Empowerment, Mobilization, and Innovation in Research & Community
Kormil Saputra
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Journal : Newton-Maxwell Journal of Physics

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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 Adella Ulyandana Jayarti Adella Ulyandana Jayatri Aditya Yoga Purnama Agista, Wida Puteri Agness Claundya NT Ahmad Rifaldi Arahman Ahmad Taufiq Ahmad Zarkasi Ainiyah Fatin Alfina Taurida Alaydrus Alifni Aulia Aminy, Ika UA. Aminy, Ika Umratul Asni Amirin Kusmiran Anggun Almadani Anisa Anisa Apriani Apriani Arif Budianto Arif Hidayat Arin Artha Callista Ariyanthi, Gita Putri Ayu Mona Erisa Marpaung Baiq Adilya Putri Humaira Fatarani Baiq Laelatin Diniati Baiq Nabila Nasywa Baiq Revalina Restu Khaunifar Bakti Sukrisna Cahaya Rizkika Imanda Chanakan Sojayapan Chusna, Nadiya Miftachul Deatun Zahra Dewi Kgajar Fitriana Dian W. Kurniawidi Dian Wijaya Kurniawidi Dimas Mahendra Dionysius J. D. H. Santjojo Dwi Septia Kari Elen Renata Putra Fajariman, Ilham Dias Fatima Naimi Fauziana Hidayat Fina Nahdia Fitri Gina Fadilla Gusti Ayu Niatri Halia Safitri Handriani, Handriani Hendra Susanto Hidayati, Dian M. I Wayan Sudiarta Ika Umratul Asni Aminy Inayah, Rahmatun Indah Nur Gusfiana Indrawan Eka Badri Istiroyah Jayatri, Adella U. Kholis Nurhanafi Khuzaima, Nabila D. Kurniawan, Bakhrul Rizky Kurniawidi, Dian W. Kurniawidi, Dian Wijaya Laili Hidayati Laksono, Yoyok Adi Setio Luluk Tsaroya Zarkasyi Madani, Awanda OP. Maratus Soleha Markus Diantoro Marlina, Resti Marzuki Marzuki Masruroh Masruroh MASRUROH Melani Melani Mira Suhada Mislan Mohammad Asrul Muhammad Hardiansyah Muhammad Ihzan Muhammad Jarul Rozki Muhammad Zuhdi Munir, Rahmawati Nabila Dwi Septia Nahdatul Wesi Najma Aldina Roshin Nandang Mufti Nela Ranita Amanda Nur Azzahra Al Radiyah Nurhasmi Wahyuni Nurjannah Nurjannah Nurmutyah Naylah Nurwijayanti Rahadi Wirawan Rahmatun Inayah Ramadian Ridho Illahi Retna Apsari Saefullah, Lalu Sayida Magfirah Sembiring, Rinawati Shamim Mahabubul Haque Siti Azizah Sofiana Aprilia Suhayat Minardi Sunaryono Sunaryono Sunaryono, Sunaryono Susi Rahayu Syahrial A Syamsuddin Syamsuddin Syamsuddin Teguh Ardianto, Teguh Thathit Suprayogi Umratun Hasanah Wahyu Lina Ramadani Wahyudin Wahyudin Wida Puteri Agista Wulandari, Nurul Putri Yuliana, Futri Yunan Amza Muhammad Yunitun Tamara Ziyadatun Adawiyah Zyiadatun Adawiah