Neutron diffraction study of magnetic ordering in PrCu2Si2, PrCu2Ge2, PrFe2Ge2 and NdFe2Ge2 |
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| Authors: | A Szytua? W Ba?ela J Leciejewicz |
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| Institution: | Institute of Physics, Jagellonian University, Kraków, Poland;Institute of Physics, Technical University of Cracow, Kraków, Poland;Institute of Nuclear Chemistry and Technology, Warszawa, Poland |
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| Abstract: | A neutron diffraction study of polycrystalline PrCu2Si2 1], PrCu2Ge2 2], PrFe2Ge2 3] and NdFe2Ge2 4] intermetallics carried out at liquid helium temperature shows the presence of a collinear antiferromagnetic order below TN = 19 ± 1 K 1], TN = 16 ± 1 K 2], TN = 9 ± 1 K 3] and 13 ± 1 K 4]. Magnetic moment, parallel to the c-axis is localized on RE ions only. The magnetic structure of these compounds consists of ferromagnetic layers perpendicular to the c-axis coupled antiferromagnetically with sequence +-+- for PrCu2Si2 and PrCu2Ge2 and +--+ for PrFe2Ge2 and NdFe2Ge2. The RE moments amount close to the free ion values for Fe containing compounds but are smaller in those containing Cu suggesting a fairly strong influence of crystal field. |
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