Evolution of magnetic properties in the solid solution DyCo sub(1-x)Ni sub(x)C sub(2)

The crystal structure of the solid solution of DyCo sub(1-x)Ni sub(x)C sub(2) (0 [< or =] x [< or =] 1) was investigated by means of X-ray powder diffraction: structure type CeNiC sub(2), space group Amm2, and Pearson symbol oS8. The structural analysis reveals a non-monotonous evolution in pa...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2015-01, Vol.374, p.553-558
Main Authors: Michor, H, Levytskyy, V, Schwarzbock, F, Babizhetskyy, V, Kotur, B
Format: Article
Language:English
Subjects:
Antiferromagnetism
Constants
Crossovers
Evolution
Nickel
Order disorder
Solid solutions
Unit cell
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Summary:The crystal structure of the solid solution of DyCo sub(1-x)Ni sub(x)C sub(2) (0 [< or =] x [< or =] 1) was investigated by means of X-ray powder diffraction: structure type CeNiC sub(2), space group Amm2, and Pearson symbol oS8. The structural analysis reveals a non-monotonous evolution in particular for the a- and c-lattice constants resulting in a non-linear increase of the unit cell volume due to non-isoelectronic substitution of Co by Ni markedly deviating from Vegard's law. A crossover from ferro- to antiferromagnetic ordering with a significant reduction of the magnetic ordering temperature at intermediate compositions in DyCo sub(1-x)Ni sub(x)C sub(2) is observed when varying the Ni-concentration. A crossover from ferro- to antiferromagnetic coupling is also revealed from a sign change of the paramagnetic Curie temperature when proceeding along this solid solution.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2014.08.085