Cation distribution effect on static and dynamic magnetic properties of Co1-xZnxFe2O4 ferrite powders

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:456

Article

Barrera, G.¹  Coisson, M.¹  Celegato, F.¹  Raghuvanshi, S.²  Mazaleyrat, F.³  Kane, S. N.²  Tiberto, P.¹ 

[1] INRiM, Nanosci & Mat Div, Str Cacce 91, I-10135 Turin, Italy

[2] Devi Ahilya Univ, Sch Phys, Khandwa Rd Campus, Indore 452001, Madhya Pradesh, India

[3] Univ Paris Saclay, CNRS 8029, ENS Cachan, SATIE, 61 Av President Wilson, F-94235 Cachan, France

关键词: Cobalt-zinc ferrites;    Non-equilibrium cation distribution;    Structure characterization;    Magnetic characterization;    Energy losses;   

DOI  :  10.1016/j.jmmm.2018.02.072

来源: Elsevier

【 摘 要 】

Co1-xZnxFe2O4 (0.08 <= x <= 0.56) powders prepared by a sol-gel auto-combustion method have been investigated through the combined use of structural and dc/ac-magnetization measurements under a wide range of applied magnetic field values. EDS spectra are performed to evaluate the samples chemical composition, whereas the X-ray diffraction measurements indicate the formation of the typical nanocrystalline mixed cubic spinel structure and allow to determine the cationic distribution as well as the lattice parameter and the oxygen position as function of Zn content. Magnetic characterization improves the knowledge about the correlation between the structural properties and magnetic behavior. The magnetization curves show a hysteretic behavior at room temperature and they are analyzed as function of Zn content taking in account the Yafet-Kittel's model. The replacement of non-zero magnetic moment Co2+ ions with zero magnetic moment Zn2+ ions induces a gradual reduction of magnetocrystalline anisotropy and a lowering of the magnetic coercivity. The energy lost in a static and alternating magnetic field (frequency of 69 kHz) at selected vertex field values for the studied samples has been calculated in order to evaluate their prospective usage to operate in different field conditions. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

Free