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Title: Mechanical milling induced enhancement of magnetic and hyperfine properties of nanosized Co{sub 0.3}Zn{sub 0.7}Fe{sub 2}O{sub 4}

Nanosized Co{sub 0.3}Zn{sub 0.7}Fe{sub 2}O{sub 4} having average particle size ∼20 nm has been synthesized by mechanochemical method. The results of dc magnetic and Mössbaeur studies suggest that the sample is ferrimagnetic in nature and shows superparamagnetic behavior above 230K. Magnetic ordering in the sample evolves gradually upon cooling the system below blocking temperature. Moreover, the sample exhibits enhancement of magnetic order and ordering temperature with respect to its counterpart synthesized by chemical routes mainly due to increase of stress anisotropy induced by high energy ball milling. We have shown that maintaining suitable cation distribution helps in enhancement of magnetization by reducing the adverse effect of spin canting.
Authors:
; ; ;  [1] ; ;  [2]
  1. Department of Physics, Jadavpur University, Kolkata-700032 (India)
  2. Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata-700064 (India)
Publication Date:
OSTI Identifier:
22490286
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1665; Journal Issue: 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTROSCOPY; ANISOTROPY; CATIONS; CHANNELING; COBALT COMPOUNDS; COOLING; FERRITES; MAGNETIZATION; MILLING; MOESSBAUER EFFECT; NANOPARTICLES; NANOSTRUCTURES; PARTICLE SIZE; SPIN; STRESSES; SUPERPARAMAGNETISM; TEMPERATURE DEPENDENCE; ZINC COMPOUNDS