Structure and magnetic properties of Mn doped α-Fe2O3

被引：17

作者：

Nikam, R. ^{[1
]}

Rayaprol, S. ^{[2
]}

Mukherjee, S. ^{[2
]}

Kaushik, S. D. ^{[2
]}

Goyal, P. S. ^{[1
]}

Babu, P. D. ^{[2
]}

Radha, S. ^{[3
]}

Siruguri, V. ^{[2
]}

机构：

[1] Pillai Coll Engn, Dept Phys, Navi Mumbai 410206, India

[2] Mumbai Ctr, UGC DAE Consortium Sci Res, BARC Campus, Mumbai 400085, Maharashtra, India

[3] Univ Mumbai, Dept Phys, Mumbai 400098, Maharashtra, India

来源：

PHYSICA B-CONDENSED MATTER | 2019年 / 574卷

关键词：

Magnetic materials; Iron oxide; Structure; Neutron diffraction; HYDROTHERMAL SYNTHESIS; HEMATITE; NANOPARTICLES; NANOSTRUCTURES; TEMPERATURE; DIFFRACTION;

D O I：

10.1016/j.physb.2019.411663

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Magnetic transition metal oxides are interesting candidates for both academic as well as industrial researches. In the present work, we study the influence of partial Mn doping on structural and magnetic and dielectric properties of alpha-Fe2O3 using x-ray and neutron diffraction, magnetization and dielectric measurements. In particular, this paper deals structural, magnetic and dielectric properties of Fe1.95Mn0.05O3. The compound is found to crystallize in corundum type (alpha-Al2O3) having rhombohedral lattice structure with hexagonal setting in the space group (R-3c). It is seen that partial substitution of Fe by Mn in alpha-Fe2O3 (known as hematite) drastically alters the Morin transition in the hematite compound by reducing the ordering temperature from a value of 260 K to about 220 K. Information about ferrimagnetic structure of Fe1.95Mn0.05O3 has been obtained from the magnetic part of the neutron diffraction analysis. The results of room temperature neutron diffraction, temperature dependent magnetization and dielectric studies are reported and discussed in the present work in order to understand the correlation between structure and magnetism in this compound and ways in which magnetism and other physical properties can be controlled.

引用

页数：6

共 29 条

[1] Studies on the Structural, Morphological, Optical, and Magnetic Properties of α-Fe2O3 Nanostructures by a Simple One-Step Low Temperature Reflux Condensing Method [J].

Adinaveen, T. ;

Vijaya, J. Judith ;

Kennedy, L. John .

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 2014, 27 (07) :1721-1727

[2] Size dependence of the magnetic and hyperfine properties of nanostructured hematite (γ-Fe2O3) powders prepared by the ball milling technique [J].

Andre-Filho, J. ;

Leon-Felix, L. ;

Coaquira, J. A. H. ;

Garg, V. K. ;

Oliveira, A. C. .

HYPERFINE INTERACTIONS, 2014, 224 (1-3) :189-196

[3]

Balaraju B., 2017, MAT SCI ENG J, V9

[4] Neutron powder diffraction study of Mn-bearing hematite, α-Fe2-xMnxO3, in the range 0 ≤ x ≤ 0.176 [J].

Baron, V ;

Gutzmer, J ;

Rundlöf, H ;

Tellgren, R .

SOLID STATE SCIENCES, 2005, 7 (06) :753-759

[5] Morphology dependent magnetic properties of α-Fe2O3 nanostructures [J].

Chakrabarty, S. ;

Jana, T. K. ;

De, K. ;

Das, S. ;

Dey, K. ;

Chatterjee, K. .

MATERIALS RESEARCH EXPRESS, 2014, 1 (04)

[6] Novel processing and magnetic properties of hematite/maghemite nano-particles [J].

Deraz, N. M. ;

Alarifi, A. .

CERAMICS INTERNATIONAL, 2012, 38 (05) :4049-4055

[7] Neutron diffraction study of mesoporous and bulk hematite, α-Fe2O3 [J].

Hill, A. H. ;

Jiao, F. ;

Bruce, P. G. ;

Harrison, A. ;

Kockelmann, W. ;

Ritter, C. .

CHEMISTRY OF MATERIALS, 2008, 20 (15) :4891-4899

[8] Magnetic properties of nano-scale hematite, α-Fe2O3, studied by time-of-flight inelastic neutron spectroscopy [J].

Hill, Adrian H. ;

Jacobsen, Henrik ;

Stewart, J. Ross ;

Jiao, Feng ;

Jensen, Niels P. ;

Holm, Sonja L. ;

Mutka, Hannu ;

Seydel, Tilo ;

Harrison, Andrew ;

Lefmann, Kim .

JOURNAL OF CHEMICAL PHYSICS, 2014, 140 (04)

[9] Facile synthesis of hematite nanostructures with controlled hollowness and porosity and their comparative photocatalytic activities [J].

Liang, Hanfeng ;

Xu, Xun ;

Chen, Wei ;

Xu, Binbin ;

Wang, Zhoucheng .

CRYSTENGCOMM, 2014, 16 (06) :959-963

[10] Morin Temperature and Neel Temperature of Hematite Nanocrystals [J].

Lu, H. M. ;

Meng, X. K. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (49) :21291-21295

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