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2009 | 115 | 1 | 357-359
Article title

Exchange Bias in Iron-Oxide Particles Nanocasted in Periodic Porous Silica

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EN
Abstracts
EN
Iron-oxide nanoparticles were nanocasted in the periodic mesoporous silica matrix, consisting of two-dimensional hexagonally ordered channel system with the mean diameter of the channels about 7 nm. The magnetic measurements of dc magnetization confirm behavior typical of a superparamagnetic system, such as the irreversibility of the zero-field-cooled and field-cooled curves, presence of a maximum in zero-field-cooled curve related with blocking temperature T_C and revealing of coercivity H_C below T_C. The existence of negative exchange bias effect below T_C was confirmed in our system represented by value of exchange bias field H_{EB}=-970 Oe measured at the temperature 2 K.
Keywords
Contributors
  • Department of Solid State Physics, University of P.J. Šafárik, Park Angelinum 9, 041 54 Košice, Slovakia
author
  • Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia
author
  • Department of Inorganic Chemistry, University of P.J. Šafárik, Moyzesova 51, 041 54 Košice, Slovakia
References
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  • 2. A. Hoffmann, M. Grimsditch, J.E. Pearson, J. Nogués, W.A.A. Macedo, I.K. Schuller, Phys. Rev. B 67, 220406 (2003)
  • 3. S. Polisetty, S. Sahoo, C. Binek, Phys. Rev. B 76, 184423 (2007)
  • 4. M.G. Blamire, M. Ali, C.W. Leung, C.H. Marros, J.B. Hickley, Phys. Rev. Lett. 98, 217202 (2007)
  • 5. S.A. Makhlouf, H.A. Attar, R.H. Kodama, Solid State Commun. 145, 1 (2008)
  • 6. N. Domingo, A.M. Testa, D. Fiorani, Ch. Binns, S. Baker, J. Tejada, J. Magn. Magn. Mater. 316, 155 (2007)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv115n1103kz
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