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Number of results
2012 | 121 | 5-6 | 1132-1135
Article title

Effect of Tb/Gd Substitution on Crystal Structure and Exchange Interactions of Gd_{1 - x}Tb_{x}Ni_3 Intermetallic Compounds

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EN
Abstracts
EN
In the paper an influence of Tb/Gd substitution on crystal structure and exchange interactions of Gd_{1 - x}Tb_{x}Ni_3 (x = 0.0, 0.5, 0.8, 1.0) polycrystalline compounds have been studied. The crystal structure of all samples was checked at the room temperature by means of X-ray diffraction. Exchange integrals of R-R (J_{RR}), T-T (J_{TT}) and R-T (J_{RT}) atoms were evaluated from M(T) magnetization curves (2-300 K, 2 T) based on the mean field theory calculation. As it was shown the samples examined are single phase and crystallize in the PuNi_3 (space group R-3m) type of crystal structure. The Tb/Gd substitution causes the decrease of lattice parameters as well as the volume of the unit cell. With increase of the x parameter the magnetic moment of Tb atoms increases from 6.94 μ_{B} (x = 0.5) to 8.12 μ_{B} (x = 1). The M(T) dependence of the examined compounds depends almost 8 times stronger on exchange interactions within the R-R site than the interactions between the two antiferromagnetically coupled magnetic sublattices R-T.
Keywords
EN
Contributors
author
  • A. Chełkowski Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
author
  • A. Chełkowski Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
  • A. Chełkowski Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv121n5-6p42kz
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