Structural, magnetic, and Mossbauer spectroscopic study of La3+ and Cu1+ co-doped M-type strontium hexaferrite

Effects of La3+ and Cu1+ co-doping on the structural and the magnetic properties of M-type strontium hexaferrite have been studied by using crystallographic and magnetic measurements. Stoichiometric samples have been prepared by a conventional ceramic technique with repeated sintering at 1300 & DEG;C for 24 hours in the air. XPS Cu 2p scan shows that dominant valence state of Cu is +1. Analyses of the hysteresis curve reveals that M-S increases and H-C decreases with La-Cu content x. Room temperature Mossbauer spectral analysis indicates that Cu1+ preferentially replaces Fe3+ at 4f(2) site, which is consistent with the increase of M-S with respect to the La3+-Cu1+ co-doping. (c) 2022 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license(http://creativecommons.org/licenses/by/4.0/).