Effect of high pressure on Mossbauer spectra of NiFe2O4 ultrafine particles with different grain sizes

IMR OpenIR

	Effect of high pressure on Mossbauer spectra of NiFe2O4 ultrafine particles with different grain sizes
	Y. G. Ma; M. Z. Jin; M. L. Liu; G. Chen; Y. Sui; Y. Tian; G. J. Zhang; Y. Q. Jia
	2000
发表期刊	Materials Chemistry and Physics
ISSN	0254-0584
卷号	65 期号:1 页码:79-84
摘要	The nickel ferrite ultrafine powders with different grain sizes (8, 12, 20, 40 and 80 nm) have been synthesized. Mossbauer spectra of Fe-57 nucleus in the samples composed of the nickel ferrite ultrafine powder before and after the high pressure treatments have been measured. The superparamagnetic relaxation is markedly suppressed by high pressure. The intensity of the sextets in Mossbauer spectra increases with increasing the grain size or pressure. The effect of high pressure on Mossbauer spectra of the samples may involve not only the physical changes, but also the chemical or structural ones in the ultrafine particles during the high pressure treatment, such as the formation of the interfacial region between the ultrafine particles and the rearrangements of the atoms in the surface layers of the ultrafine particles. (C) 2000 Elsevier Science S.A. All rights reserved.
部门归属	e china univ sci & technol, dept chem, shanghai 200237, peoples r china. jilin univ, anal test ctr, changchun 130023, peoples r china. acad sinica, shenyang inst met res, shenyang 110015, peoples r china. lucky star high technol grp co, changchun 130021, peoples r china.;jia, yq (reprint author), e china univ sci & technol, dept chem, shanghai 200237, peoples r china
关键词	Mossbauer Spectrum Nickel Ferrite Ultrafine Particles High Pressure
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37135
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. G. Ma,M. Z. Jin,M. L. Liu,et al. Effect of high pressure on Mossbauer spectra of NiFe2O4 ultrafine particles with different grain sizes[J]. Materials Chemistry and Physics,2000,65(1):79-84.
APA	Y. G. Ma.,M. Z. Jin.,M. L. Liu.,G. Chen.,Y. Sui.,...&Y. Q. Jia.(2000).Effect of high pressure on Mossbauer spectra of NiFe2O4 ultrafine particles with different grain sizes.Materials Chemistry and Physics,65(1),79-84.
MLA	Y. G. Ma,et al."Effect of high pressure on Mossbauer spectra of NiFe2O4 ultrafine particles with different grain sizes".Materials Chemistry and Physics 65.1(2000):79-84.