Available online at www.sciencedirect.com ScienceDirect Materials Today: Proceedings 5 (2018) 22181–22187 www.materialstoday.com/proceedings 2214-7853 © 2018 Elsevier Ltd. All rights reserved. Selection and/or Peer-review under responsibility of International Conference on Advances in Science & Engineering ICASE - 2017. ICASE_2017 Synthesis of Cr and Al Substitution Calcium Nano Hexaferrite by Sol-Gel Auto-Combustion Method A.P. Bhat a , S.J. Dhoble b , D. K. Sahu c , K. G. Rewatkar d* a Depatrment of Electronics, RTM Nagpur university Nagpur-440033 India. b Department of Physics, Dr. Ambedkar college, Nagpur-440010 India. c Department of Physics RTM Nagpur University, Nagpu-440033 India. d Department of Physics, R.S. Govt. P.G. College Lalitpur- 284402, India Abstract In the present research module the samples with chemical composition CaMeFe 11 O 19 (where Me = Al and Cr) were successfully synthesized using perfect stoichiometeric proportions of reacting oxides by sol gel auto-combustion method. X - ray diffraction analysis of sample showed that both the compounds are in single, hexagonal M - type phase with unit cell dimensions ‘a’ and ‘c’ varies between 5 to 6 Ǻ and 21 to 23 Å respectively with space group SG:P6 3 /mmc (No. 194). Scanning Electron Microscopy (SEM) analysis showed a good crystallization, smooth surface without any cracks. The Transmission Electron Microscopy (TEM) analysis proved that the compounds belong to nanoparticle range. The magnetic properties measured using vibrating sample magnetometer (VSM), optimized saturation magnetization (Ms) of the compound reached 67.9emu/g and 14.8emu/g for Al and Cr substituted compound respectively, while coercive force (Mr) ranges between 3386.1 Oe for Al and 1046.0 Oe for Cr. These values are close to that of its counterpart with CaM. © 2018 Elsevier Ltd. All rights reserved. Selection and/or Peer-review under responsibility of International Conference on Advances in Science & Engineering ICASE - 2017. Keywords: Nanoferrite; Saturation magnetizatio Coercivity; Sol gel auto combustion; X – ray diffraction. 1. Introduction Ferrites continued to attract attention of researchers over the years due to their broad category of applications over wide frequency range, low cost and high performance. * Corresponding author: Tel: +91 7020643781 E-mail address: kgrewatkar@gmail.com