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Bulk magnetization, temperature - Dependent ac susceptibility and dc resistivity study on Mn0.7+xZn0.3SixFe2-2xO4 (x = 0.0–0.3) spinel ferrites
Physica B: Condensed Matter ( IF 2.8 ) Pub Date : 2020-06-06 , DOI: 10.1016/j.physb.2020.412302
K.G. Saija , N.H. Vasoya , S.K. Modi , U.M. Meshiya , K.K. Jani , P.Y. Raval , K.B. Modi

Polycrystalline samples of spinel ferrite series, Mn0.7+x Zn0.3SixFe2-2xO4 (x = 0.0, 0.1, 0.2, 0.3), were characterized by X-ray powder diffractometry, bulk magnetization at 300 K and 80 K, temperature dependence of low field ac susceptibility (χac (T)) (T = 300–525 K) and dc electrical resistivity (ρdc (T)) (T = 300–772 K) measurements. The variation of intrinsic and extrinsic magnetic parameters as a function of Mn–Si concentration (x) has been discussed. It is found that the system possesses a non-collinear spin arrangement and the canting angle increases with x. The Néel temperatures determined experimentally from susceptibility measurement adequately reflected the values calculated theoretically. The χac (T) curves revealed normal ferrimagnetic behavior while ρdc (T) depicts characteristic semiconducting behavior. The activation energy is found to increase with x that can be explained in light of the structural and microstructural parameters.



中文翻译:

Mn 0.7+ x Zn 0.3 Si x Fe 2-2 x O 4x = 0.0–0.3)尖晶石铁氧体的体磁化,温度相关的磁化率和直流电阻率研究

尖晶石铁氧体系列的多晶样品Mn 0.7+ x Zn 0.3 Si x Fe 2-2 x O 4x  = 0.0、0.1、0.2、0.3)通过X射线粉末衍射法,在300 K和80的体磁化进行表征K,低场交流磁化率对温度的依赖性(χ交流Ť))(Ť  = 300-525 K)和直流电阻率(ρ直流Ť))(Ť  = 300-772 K)的测量。本征和外在磁参数随Mn-Si浓度的变化(x)进行了讨论。发现该系统具有非共线的自旋排列,并且倾斜角随x增加通过磁化率实验确定的Néel温度充分反映了理论计算的值。该χ交流Ť)曲线显示正常铁磁行为而ρ直流Ť)描绘了特性的半导体行为。发现活化能随x增加,这可以根据结构和微结构参数来解释。

更新日期:2020-06-06
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