Cation distribution study of nanocrystalline NiFe2−xCrxO4 ferrite by XRD, magnetization and Mössbauer spectroscopy

✍ Scribed by Patange, Sunil M. ;Shirsath, Sagar E. ;Jadhav, Santosh S. ;Jadhav, Kamalakar M.

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 341 KB
• Volume: 209
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.201127232

✦ Synopsis

Abstract

The spinel ferrite systems NiFe~2−x~Cr~x~O~4~ (with x = 0.0–1.0 in step of 0.2) were prepared by wet chemical co‐precipitation method, using sulphates of respective metal ions. Formation of single phase spinel crystal structure of sample has been confirmed by X‐ray diffraction method. Magnetic parameters such as coercivity and saturation magnetization are measured by employing vibrating samples magnetometer (VSM). The saturation magnetization and magneton number (n~B~) decreases with increase in Cr^3+^ content x. The Mössbauer spectra taken at 300 K and spectra are assigned to two strongly overlapping sextets corresponding to tetrahedral A sites and octahedral B sites. The cation distribution of ferrites system has been calculated by X‐ray method, the behaviour of magnetization curve and Mössbauer spectra. The evaluation of cation distribution indicates that, in Cr‐dominant region, few nickel ions occupies tetrahedral A sites which convert perfect inverse spinel to partially normal spinel structure.