Structural and magnetization studies on nanoparticles of Nd doped α-Fe2O3

被引：16

作者：

Goyal, Gaurav ^{[1
,2
]}

Dogra, Anjana ^{[1
]}

Rayaprol, S. ^{[3
]}

Kaushik, S. D. ^{[3
]}

Siruguri, V. ^{[3
]}

Kishan, H. ^{[1
]}

机构：

[1] CSIR, Natl Phys Lab, Quantum Phenomena & Applicat Div, New Delhi 110012, India

[2] Delhi Technol Univ, Dept Appl Phys, Ctr Nanosci & Technol, Delhi 110042, India

[3] UGC DAE Consortium Sci Res Mumbai Ctr, Mumbai 400085, Maharashtra, India

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2012年 / 134卷 / 01期

关键词：

Magnetic materials; Nanostructures; Neutron scattering and diffraction; Oxides; HEMATITE; SILICA; REFINEMENT;

D O I：

10.1016/j.matchemphys.2012.02.041

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

It has been observed that, compared to bulk form, the nanocrystalline alpha-Fe2O3 is finding application in various areas. Magnetic properties of alpha-Fe2O3 are found to be influenced by the size of particles and are also sensitive to synthesis method employed for sample preparation. In the present work we have prepared a series of Nd doped alpha-Fe2O3 samples (x=0.0-0.5) by combustion method, without using any fuel. The analysis of room temperature neutron diffraction patterns shows that all the compounds of the series form in the hematite (alpha-Fe2O3) structure, space group R-3c. Magnetization measurements show that there is a broad distribution of particle size in the samples. We find that the increase in the Nd content results in the dilution of magnetism of alpha-Fe2O3. From results we believe that inclusion of Nd in alpha-Fe2O3 drastically modifies the magnetic properties. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：133 / 138

页数：6

共 28 条

[1]

[Anonymous], WINPLOTR

[2] Memory effect of ball-milled and annealed nanosized hematite [J].

Bercoff, P. G. ;

Bertorello, H. R. ;

Oliva, M. I. .

PHYSICA B-CONDENSED MATTER, 2007, 398 (02) :204-207

[3]

BLAKE RL, 1966, AM MINERAL, V51, P123

[4]

Blundell S., 2001, Magnetism in Condensed Matter

[5] Magnetic properties of hematite nanoparticles [J].

Bodker, F ;

Hansen, MF ;

Koch, CB ;

Lefmann, K ;

Morup, S .

PHYSICAL REVIEW B, 2000, 61 (10) :6826-6838

[6]

Cullity B.D., 1972, Introduction to Magnetic Materials

[7] Magnetic relaxation measurements of α-Fe2O3 antiferromagnetic particles below 1 K -: art. no. 052404 [J].

del Barco, E ;

Duran, M ;

Hernandez, JM ;

Tejada, J ;

Zysler, RD ;

Mansilla, MV ;

Fiorani, D .

PHYSICAL REVIEW B, 2002, 65 (05) :1-4

[8] Determining magnetic nanoparticle size distributions from thermomagnetic measurements [J].

DiPietro, R. S. ;

Johnson, H. G. ;

Bennett, S. P. ;

Nummy, T. J. ;

Lewis, L. H. ;

Heiman, D. .

APPLIED PHYSICS LETTERS, 2010, 96 (22)

[9] Oriented attachment and exchange coupling of α-Fe2O3 nanoparticles -: art. no. 214406 [J].

Frandsen, C ;

Bahl, CRH ;

Lebech, B ;

Lefmann, K ;

Kuhn, LT ;

Keller, L ;

Andersen, NH ;

von Zimmermann, M ;

Johnson, E ;

Klausen, SN ;

Morup, S .

PHYSICAL REVIEW B, 2005, 72 (21)

[10] Magnetic dynamics of weakly and strongly interacting hematite nanoparticles [J].

Hansen, MF ;

Koch, CB ;

Morup, S .

PHYSICAL REVIEW B, 2000, 62 (02) :1124-1135

← 1 2 3 →