NDLI: RETRACTED ARTICLE: Sol–gel synthesized high anisotropy magnetic nanoparticles of NiCr$_{ x }$Fe$_{2−x }$O$

Content Provider	Springer Nature Link
Author	Prasad, Arun S. Dolia, S. N. Pareek, S. P. Samariya, Arvind Sharma, P. K. Dhawan, M. S.
Copyright Year	2013
Abstract	The nanoparticles of NiCr$_{ x }$Fe$_{2−x }$O$_{4}$ were synthesized through sol–gel reactions involving nitrates of Ni, Cr and Fe in an aqueous medium containing citric acid. The cubic spinel structure in single phase with nanometric crystallite size of ~5 nm, the spherical morphology and magnetic relaxations were examined through XRD, TEM and Mössbauer techniques. The abnormal occurrence of finite remanance (M $_{ r }$) and coercivity (H $_{ c }$) resulted in the room temperature dc magnetization measurements for the small particles authenticate the ferrimagnetic regime, as proposed by the room temperature Mössbauer results of the samples, with a proximate superparamagnetic regime still at lower particle volumes. This could be attributed to the antiferromagnetic spin interactions of chromium ions at octahedral sites and subsequently the over-occupancy of the rest of the cations at tetrahedral sites. In justification to this, the magnetocrystalline anisotropy constant, K, is estimated to have value relatively high of the order of 10$^{7}$ erg/cm$^{3}$ at room temperature for all studied concentrations.
Starting Page	372
Ending Page	377
Page Count	6
File Format	PDF
ISSN	09280707
Journal	Journal of Sol-Gel Science and Technology
Volume Number	66
Issue Number	3
e-ISSN	15734846
Language	English
Publisher	Springer US
Publisher Date	2013-03-29
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nanostructures Sol–gel growth Debye–Scherrer powder method Mössbauer spectroscopy Ceramics, Glass, Composites, Natural Methods Inorganic Chemistry Optical and Electronic Materials Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Chemistry Materials Chemistry Biomaterials Condensed Matter Physics Electronic, Optical and Magnetic Materials

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RETRACTED ARTICLE: Sol–gel synthesized high anisotropy magnetic nanoparticles of NiCr$_{ x }$Fe$_{2−x }$O$_{4}$

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RETRACTED ARTICLE: Sol–gel synthesized high anisotropy magnetic nanoparticles of NiCr$_{ x }$Fe$_{2−x }$O$_{4}$