ACTA

Influence of Cu, Ga and Au Dopants and Technology Conditions on the Magnetic Interactions in HgCr₂Se₄ Single Crystals

J. Krok-Kowalski^a, G. Władarz^a, T. Groń^a, H. Duda^a, A.W. Pacyna^b, K. Nikiforov^c and P. Rduch^a

^aInstitute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
^bThe Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, E. Radzikowskiego 152, 31-342 Kraków, Poland
^cPhysico-Mathematical Faculty, K. Tsiolkovski State Pedagogical University, St. Razin str. 26, Kaluga 248023, Russia

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For single crystals HgCr₂Se₄ doped by nonmagnetic Cu⁺, Au²⁺ and Ga³⁺ ions and single crystals of HgCr₂Se₄ matrix growing in different synthesis conditions both the dc and ac magnetic susceptibility as well as the magnetization have been measured. As it follows from the analysis of the obtained results, paradoxically, the dopants strengthen the long range magnetic interactions of the ferromagnetically ordered single crystals under study, evidenced by the higher values of the ordering temperature in comparison with those ones for pure matrix. An influence of the technological processes connected with deficiency and/or excess of Hg on the long range magnetic interactions was not observed.

DOI: 10.12693/APhysPolA.120.970
PACS numbers: 75.50.Pp, 75.30.Kz, 75.30.Et