Mechanism of γ-irradiation induced phase transformations in nanocrystalline Mn_0.5Zn_0.5Fe₂O₄ ceramics

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• 作者：V. Jagadeesha Angadi^a ; A.V. Anupama^b ; Harish K. Choudhary^b ; R. Kumar^b ; H.M. Somashekarappa^c ; M. Mallappa^d ; B. Rudraswamy^a ; B. Sahoo^b ; ^{bsahoo@mrc.iisc.ernet.in}
• 关键词：Mn-Zn ferrite ; High energy γ-irradiation ; Mechanism of structural and magnetic phase transformations ; Ceramics ; FTIR
• 刊名：Journal of Solid State Chemistry
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：246
• 期：Complete
• 页码：119-124
• 全文大小：1048 K
• 卷排序：246

文摘

Mn atoms are more unstable in the Mn-Zn ferrite spinel lattice than Zn-atoms. Displacement of Mn atoms by γ-radiation from the lattice renders phase transformation. In Mn0.5Zn0.5Fe2O4, Mn-ferrite cell transforms to crystalline α-Fe2O3 and amorphous MnO. The stable ZnFe2O4 phase retains its structure even after 50 KGy γ-irradiation. The γ-irradiation degrades the magnetic properties of Mn0.5Zn0.5Fe2O4 ceramics.