57 Fe Mossbauer spectroscopy investigation of NiFe 2 O 4 and MnFe 2 O 4 ferrite nanoparticles prepared by thermal treatm
- PDF / 1,173,332 Bytes
- 6 Pages / 595.276 x 790.866 pts Page_size
- 103 Downloads / 198 Views
RAPID COMMUNICATIONS
57
Fe Mossbauer spectroscopy investigation of NiFe2O4 and MnFe2O4 ferrite nanoparticles prepared by thermal treatment method
Mahshid Chireh1 · Mahmoud Naseri1 · Ahmad Kamalianfar2 Received: 3 April 2020 / Accepted: 9 June 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this investigation, we have used the thermal treatment method for the preparation of nickel and manganese ferrite nanoparticles. All the samples were calcined at different temperatures from 420 to 570 °C. The results of XRD demonstrated the variation of average nanocrystallite size as a function of calcination temperature. Mossbauer spectra of calcined N iFe2O4 nanoparticles at 570 °C exhibit two sextets, indicating the samples are ferromagnetic, while calcined MnFe2O4 nanoparticles at 420 °C reveal simultaneous presence of two paramagnetic doublets with a central magnetic sextet. The Mossbauer spectroscopy is also applied here for investigating the magnetic hyperfine characteristics and cation distribution of the above-mentioned ferrite nanoparticles. Mossbauer results demonstrate that higher calcination temperature assistances M 2+ 3+ ions enter into the octahedral sites, while simultaneously F e ions transfer from the octahedral (B) sites to the tetrahedral (A) sites. As the results indicate, magnetic properties of the samples can be attributed to the hyperfine parameters such as hyperfine field and cation distribution. The results of Mossbauer showed the change in hyperfine parameters along with changing temperature and nanocrystallite size. Keywords Nanoparticles · Magnetic materials · Mossbauer · X-ray techniques
1 Introduction Mossbauer spectroscopy introduces as an excellent experimental tool to understand the magnetic properties of ferrites. In fact, this technique is used to assist in the identification of Fe oxide phases on the basis of ferrites by throwing light about the inversion parameter, deviation from stoichiometry, spin arrangement and many other [1]. The emergence of nanoscience increased the scope of this branch of spectroscopy and consequently paved the way for understanding the size-dependent magnetic behavior of materials [2]. Spinel O4 (M = Mn, Co, Zn, Mg, Ni or other metferrite, M2+ Fe3+ 2 als), is an important magnetic oxide that can be described as a cubic, closely packed arrangement of oxygen atoms, and M2+ and Fe3+ ions can occupy either A or B sites [3]. The spinel ferrite nanoparticles have attracted much attention for * Mahmoud Naseri [email protected]; [email protected] 1
Department of Physics, Faculty of Science, Malayer University, Malayer, Iran
Department of Physics, Faculty of Science, Farhangian University, Tehran, Iran
2
understanding and controlling the magnetic properties of nanoparticles at the atomic level [4]. Properties of different kinds of magnets, such as antiferrimagnet, paramagnet, ferrimagnet, re-entrant spin glass and semi-spin glass to spin glass behavior, may be displayed by spinel ferrites based on the
Data Loading...
