Influences of annealing temperature on structural characterization and magnetic properties of Mn-doped BaTiO3 ceramics

被引：64

作者：

Phan, The-Long ^{[1
,2
]}

Zhang, P. ^{[1
,2
]}

Grinting, D. ^{[1
,2
]}

Yu, S. C. ^{[1
,2
]}

Nghia, N. X. ^{[3
]}

Dang, N. V. ^{[3
]}

Lam, V. D. ^{[3
]}

机构：

[1] Chungbuk Natl Univ, Phys Program BK 21, Cheongju 361763, South Korea

[2] Chungbuk Natl Univ, Dept Phys, Cheongju 361763, South Korea

[3] Vietnam Acad Sci & Technol, Inst Mat Sci, Hanoi, Vietnam

来源：

JOURNAL OF APPLIED PHYSICS | 2012年 / 112卷 / 01期

关键词：

BARIUM-TITANATE CERAMICS; CRYSTAL-STRUCTURE; SINTERING TEMPERATURE; ROOM-TEMPERATURE; RAMAN-SPECTRA; GRAIN-GROWTH; THIN-FILMS; FERROMAGNETISM; ATMOSPHERE; RESONANCE;

D O I：

10.1063/1.4733691

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Polycrystalline samples of BaTiO3 doped with 2.0 at.% Mn were prepared by solid-state reaction at various temperatures (T-an) ranging from 500 to 1350 degrees C, used high-pure powders of BaCO3, TiO2, and MnCO3 as precursors. Experimental results obtained from x-ray diffraction patterns and Raman scattering spectra reveal that tetragonal Mn-doped BaTiO3 starts constituting as T-an approximate to 500 degrees C. The T-an increase leads to the development of this phase. Interestingly, there is the tetragonal-hexagonal transformation in the crystal structure of BaTiO3 as T-an approximate to 1100 degrees C. Such the variations influence directly magnetic properties of the samples. Besides paramagnetic contributions of Mn2+ centers traced to electron spin resonance, the room-temperature ferromagnetism found in the samples is assigned to exchange interactions taking place between Mn3+ and Mn4+ ions located in tetragonal BaTiO3 crystals. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4733691]

引用

页数：6

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