Impact of the Zn-Co content on structural and magnetic characteristics of the Ni spinel ferrites

被引:51
作者
Vinnik, D. A. [1 ]
Sherstyuk, D. P. [1 ]
Zhivulin, V. E. [1 ]
Zhivulin, D. E. [1 ]
Starikov, A. Yu. [1 ]
Gudkova, S. A. [1 ]
Zherebtsov, D. A.
Pankratov, D. A. [2 ]
Alekhina, Yu. A. [2 ]
Perov, N. S. [2 ,3 ]
Trukhanov, S. V. [4 ]
Trukhanova, E. L. [4 ]
Trukhanov, A. V. [1 ,4 ,5 ]
机构
[1] South Ural State Univ, 76 Lenin Ave, Chelyabinsk 454080, Russia
[2] Lomonosov Moscow State Univ, Leninskie Gory 1-3, Moscow 119991, Russia
[3] Balt Fed Univ, Nevskogo St 14, Kaliningrad 236041, Russia
[4] SSPA Sci & Pract Mat Res Ctr NAS Belarus, Minsk 220072, BELARUS
[5] Natl Univ Sci & Technol MISiS, Moscow 119049, Russia
关键词
Ferrites; Spinels; Diamagnetic substitution; Magnetic properties; Superexchange interactions; MICROWAVE PROPERTIES; SOLID-SOLUTIONS; NANOPARTICLES; TEMPERATURE; MOSSBAUER; FE; CU;
D O I
10.1016/j.ceramint.2022.03.070
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The manuscript describes the impact of the chemical composition (Co2+/Zn2+ ions content), crystal and magnetic characteristics of substituted Ni0.3Zn0.7-xCoxFe2O4 (0 <= x <= 0.7) Ni-based spinels (or NZCF). The initial NZCF powders were prepared using the classic ceramics method. All investigated samples were characterized by a single-phase state with a spinel-like structure - SG: Fd-3m. The average chemical composition of the final NZCF powders correlated well with the initial stoichiometry. After XRD data refinement, we observed a linear decrease of the lattice parameters and volume of the unit cell from a = 8.4085 & Aring; till a = 8.3689 & Aring; and from V = 594.51 & Aring;(3) till V = 586.14 & Aring;(3) with x increasing from 0 to 0.7, respectively. It was explained by the smaller ionic radius of Co2+ compared to Zn2+. A strong impact of the Co2+/Zn2+ ratio in Ni0.3Zn0.7-xCoxFe2O4 (0 <= x <= 0.7) Ni-based spinels on their magnetic characteristics was demonstrated. An increase in Co2+ content from x = 0.0 to x = 0.7 leads to an increase in the remnant magnetization M-r and coercivity H-c with non-linear changes in magnetization saturation M-s. It can be explained by the competition of two factors: i. Larger magnetic moment of the Co2+ ion in comparison with the Zn2+; and ii. The features of the substituent distribution in the spinel matrix. It was observed that anisotropic parameters curves are not rectilinear. This behavior has been explained by the disproportionate contribution of two competing effects, namely, an increase in the f stiffness of the Ni3+(Zn2+, Co2+/3+, Fe3+/4+) -O2-- Fe3+/4+(Ni3+, Zn2+, Co2+/3+) indirect superexchange interactions and an increase in the M-s saturation magnetization with an increase in the x concentration of the Co2+/3+ cations.
引用
收藏
页码:18124 / 18133
页数:10
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