TITLE

Effect of particle size on magnetic properties of zinc chromite synthesized by sol–gel method

AUTHOR(S)
Chen, X. H.; Zhang, H. T.; Wang, C. H.; Luo, X. G.; Li, P. H.
PUB. DATE
December 2002
SOURCE
Applied Physics Letters;12/2/2002, Vol. 81 Issue 23, p4419
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Spinel zinc chromite nanocrystals with various grain sizes ranging from 6.8 to 32 nm have been synthesized using a formalin sol-gel method. Samples were characterized by x-ray diffraction, transmission electron micrograph, and superconducting quantum interference device magnetometer. An effect of particle size on magnetic properties is observed. The decrease in particle size leads to a large enhancement of magnetization. Antiferromagnetic transition disappears when the particles reach a critical size, which can be explained by the deviation from the normal spinel structure in the cation distribution induced by particle size.
ACCESSION #
8563531

 

Related Articles

  • Detection of hydrogen-copper clustering in Zn1− x CuxO compounds using neutron scattering methods. Trunov, V. A.; Sokolov, A. E.; Lebedev, V. T.; Smirnov, O. P.; Kurbakov, A. I.; Van den Heuvel, J.; Batyrev, E.; Yurieva, T. M.; Plyasova, L. M.; Török, G. // Physics of the Solid State;Jul2006, Vol. 48 Issue 7, p1291 

    The atomic and cluster structure of hydrogen-treated Cu/ZnO (the major component of methanol synthesis catalysts) was studied using Bragg powder and small-angle neutron diffraction. Isotopic substitution of Cu and H was used to obtain reliable results indicating Cu and H clustering. The clusters...

  • MODELLING OF THE CRYSTALLIZATION FRONT - PARTICLES INTERACTIONS IN ZnAl/(SiC)p COMPOSITES. SZUCKI, M.; KALISZ, D.; LELITO, J.; ŻAK, P. L.; SUCHY, J. S.; KRAJEWSKI, K. W. // Metalurgija;2015, Vol. 54 Issue 2, p375 

    The presented work focuses on solid particle interactions with the moving crystallization front during a solidification of the metal matrix composite. The current analyses were made for silicon carbide particles and ZnAl alloy with different additions of aluminium. It was found, that the...

  • Al-doped zinc oxide films deposited by stimultaneous rf and dc excitation of a magnetron plasma:... Cebulla, R.; Wendt, R.; Ellmer, K. // Journal of Applied Physics;1/15/1998, Vol. 83 Issue 2, p1087 

    Presents a study conducted on Al-doped zinc oxide films deposited by simultaneous rf and dc excitation of a magnetron plasma. Details on the relationship between plasma parameters and structural and electrical film properties; Methodology used to determined the deposit rate for ZnO target;...

  • Hydrothermal Synthesis and Spectroscopic Properties of Crystalline ZnO Powders and Films. Dem'yanets, L. N.; Li, L. E.; Uvarova, T. G.; Mininzon, Yu. M.; Briskina, Ch. M.; Zhilicheva, O. M.; Titkov, S. V. // Inorganic Materials;Nov2004, Vol. 40 Issue 11, p1173 

    Polycrystalline zinc oxide is synthesized under mild hydrothermal conditions (150-250�C). The phase composition, morphology, and pulsed cathodoluminescence (PCL) spectra of ZnO powders, polycrystalline films, and single crystals are studied as a function of synthesis conditions (the nature...

  • Pressure and Temperature Effects on Point-Defect Equilibria and Band Gap of ZnS. Morozova, N. K.; Karetnikov, I. A.; Golub, K. V.; Gavrishchuk, E. M.; Yashina, E. V.; Plotnichenko, V. G.; Galstyan, V. G. // Inorganic Materials;Nov2004, Vol. 40 Issue 11, p1138 

    The pressure (100-200 MPa) and temperature (900-1100�C) effects on the equilibria of native point defects and background impurities in Zn-enriched ZnS are studied using cathodoluminescence and transmission spectra. The optimal conditions are found under which high pressures and temperatures...

  • In situ high temperature XRD studies of ZnO nanopowder prepared via cost effective ultrasonic mist chemical vapour deposition. Singh, Preetam; Kumar, Ashvani; Kaushal, Ajay; Kaur, Davinder; Pandey, Ashish; Goyal, R. N. // Bulletin of Materials Science;2008, Vol. 31 Issue 3, p573 

    Ultrasonic mist chemical vapour deposition (UM-CVD) system has been developed to prepare ZnO nanopowder. This is a promising method for large area deposition at low temperature inspite of being simple, inexpensive and safe. The particle size, lattice parameters and crystal structure of ZnO...

  • Aggregation of zinc tetraphenylporphyrin characterized by ensemble and single-molecule fluorescence spectroscopy. O'Brien, Jaclyn A.; Lu, Yin; Hooley, Emma N.; Ghiggino, Kenneth P.; Steer, Ronald P.; Paige, Matthew F. // Canadian Journal of Chemistry;Feb2011, Vol. 89 Issue 2, p122 

    The aggregation of metalloporphyrins is believed to play a crucial role in the excited-state annihilation process known as triplet-triplet annihilation, which in turn has significant potential applications in photon upconversion schemes. In this work, the propensity of the water-soluble...

  • Magnetic tunnel junctions with a zinc oxide–cobalt oxide composite tunnel barrier. Le Brizoual, L.; Alnot, P.; Hehn, M.; Montaigne, F.; Alnot, M.; Schuhl, A.; Snoeck, E. // Applied Physics Letters;3/14/2005, Vol. 86 Issue 11, p112505 

    Composite CoO–ZnO tunnel junctions showing nonlinear and asymmetric current-voltage characteristics with significant magnetoresistance ratios (up to 8% at 77 K) have been prepared by using reactive sputtering from a zinc target. Electron transmission microscopy demonstrates the formation...

  • Permittivity Spectra and Characteristic Energy Losses of Electrons in ZnO at 100 K. Sobolev, V. Val.; Sobolev, V. V.; Terukov, E. I. // Semiconductors;Aug2005, Vol. 39 Issue 8, p898 

    For the first time, full sets of fundamental optical functions have been obtained for zinc oxide in the range 0–30 eV at 100 K for E ⊥ c and E || c polarizations. Spectra of the transverse and longitudinal components of transitions and their basic parameters (peak energies Ei,...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics