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Accession number:  20094912528041

Title:  Synthesis of nanocrystalline Ni0.5Zn0.5Fe2O4 ferrite and study of its magnetic behavior at different temperatures

Authors:  Kumar, Sanjeev1 ; Singh, Vaishali1 ; Aggarwal, Saroj1 ; Mandal, Uttam Kumar2 ; Kotnala, R.K.3  

Author affiliation:  1  University School of Basic and Applied Sciences, GGS Indraprastha University, Kashmere Gate, New Delhi, 110403, India

2  University School of Chemical Technology, GGS Indraprastha University, Kashmere Gate, New Delhi, 110403, India

3  National Physical Laboratory, New Delhi, 110012, India


Corresponding author:  Singh, V. (dr_vaishali_singh@yahoo.co.in)  

Source title:  Materials Science and Engineering B: Solid-State Materials for Advanced Technology

Abbreviated source title:  Mater Sci Eng B Solid State Adv Technol

Volume:  166

Issue:  1

Issue date:  January 15, 2010

Publication year:  2009

Pages:  76-82

Language:  English

ISSN:  09215107

CODEN:  MSBTEK

Document type:  Journal article (JA)

Publisher:  Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom

Abstract:  Ni0.5Zn0.5Fe2O4 ferrite nanocrystals with average diameter in the range of 1-2 nm have been synthesized by reverse microemulsion. X-ray diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM) are used to characterize the structural, morphological and magnetic properties. X-ray analysis showed that the nanocrystals possess cubic spinel structure. The absence of hysteresis, negligible remanence and coercivity at 300 K indicate the superparamagnetic character and single domain in the nanocrystalline Ni0.5Zn0.5Fe2O4 ferrite materials. The nanocrystalline Ni0.5Zn0.5Fe2O4 ferrite were annealed at 600 ¡ãC. As a result of heat treatment the average particle size increases from 2 nm to 5 nm and the corresponding magnetization values have increased to 21.69 emu/g at 300 K. However, at low temperature of 100 K, the annealed samples show hysteresis loop which is the characteristic of a superparamagnetic to ferromagnetic transition. In addition, a comparative study of the magnetic properties of Ni0.5Zn0.5Fe2O4 ferrite nanocrystals obtained from reverse microemulsion has been carried out with those obtained from the general chemical co-precipitation route. © 2009 Elsevier B.V. All rights reserved.

Number of references:  28

Main heading:  Magnetic materials

Controlled terms:  Diffraction  -  Ferrite  -  Hysteresis  -  Low temperature operations  -  Magnetic properties  -  Magnetic variables measurement  -  Magnetization  -  Magnets  -  Metal analysis  -  Microemulsions   -  Monitoring  -  Nanocrystalline materials  -  Nanocrystals  -  Nanostructured materials  -  Nickel  -  Precipitation (chemical)  -  Superparamagnetism  -  Synthesis (chemical)  -  Transmission electron microscopy  -  X ray diffraction   -  X ray diffraction analysis  -  Zinc

Uncontrolled terms:  B. Chemical synthesis  -  Chemical synthesis  -  D. Magnetic measurement  -  Magnetic measurements  -  TEM

Classification code:  802.2 Chemical Reactions  -  933.1.1 Crystal Lattice  -  933.1 Crystalline Solids  -  931.3 Atomic and Molecular Physics  -  931.2 Physical Properties of Gases, Liquids and Solids  -  804 Chemical Products Generally  -  802.3 Chemical Operations  -  933.3 Electronic Structure of Solids  -  942 Electric and Electronic Measuring Instruments  -  942.4 Magnetic Variables Measurements  -  943 Mechanical and Miscellaneous Measuring Instruments  -  944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments  -  961 Systems Science  -  941 Acoustical and Optical Measuring Instruments  -  801.3 Colloid Chemistry  -  531 Metallurgy and Metallography  -  704 Electric Components and Equipment  -  701.2 Magnetism: Basic Concepts and Phenomena  -  548.1 Nickel  -  546.3 Zinc and Alloys  -  545.3 Steel  -  531.2 Metallography  -  708.4 Magnetic Materials  -  714.2 Semiconductor Devices and Integrated Circuits  -  741.1 Light/Optics  -  741.3 Optical Devices and Systems  -  761 Nanotechnology  -  801 Chemistry  -  711.1 Electromagnetic Waves in Different Media

DOI:  10.1016/j.mseb.2009.10.009

Database:  Compendex

   Compilation and indexing terms, © 2009 Elsevier Inc.
2Â¥2009-12-11 12:45:20
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