ACTA

Spin Crossover in Cu_xCo_yCr_zSe₄ Semiconductors

E. Maciążek^a, T. Groń^b, A.W. Pacyna^c, T. Mydlarz^d, B. Zawisza^a and J. Krok-Kowalski^b
^aInstitute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland
^bInstitute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
^cThe Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, E. Radzikowskiego 152, 31-342 Kraków, Poland
^dInternational Laboratory of High Magnetic Fields and Low Temperatures, Gajowicka 95, 53-529 Wrocław, Poland

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Magnetization and magnetic susceptibility measured in the zero-field-cooled mode were used to study the spin crossover transition in polycrystalline Cu_xCo_yCr_zSe₄ compounds. With increasing Co content a transition from ferromagnetic order via ferrimagnetic one to antiferromagnetic-like behaviour was observed. This transition is accompanied with a lowering symmetry from cubic to monoclinic and for the latter the spin crossover phenomenon occurs. These results are considered in a framework of the ligand-field split and the spin-orbit coupling.

DOI: 10.12693/APhysPolA.119.711
PACS numbers: 75.30.Wx, 75.50.Dd, 75.50.Ee