ACTA

Specific Heat and Magnetic Properties of Single-Crystalline (Zn_0.925In_0.054)[Cr_1.84In_0.152]Se₄ Semiconductor

E. Malicka^a, T. Groń^b, A.W. Pacyna^c, A. Ślebarski^b, J. Goraus^b, A. Gągor^d and T. Mydlarz^e
^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
^dInstitute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław, Poland
^eInternational Laboratory of High Magnetic Fields and Low Temperatures, Gajowicka 95, 53-529 Wrocław, Poland

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An antiferromagnetic order with a Néel temperature T_N = 17.5 K, a strong ferromagnetic exchange evidenced by a positive Curie-Weiss temperature θ_CW = 77.3 K, the fuzzy peaks in the real component of susceptibility χ'(T) and the disappearance of the second critical field were established. The curvature of specific heat C(T) and C(T)/T in surrounding of T_N indicated a broad peak, characteristic for the system with inhomogeneous magnetic state (spin-glass-like phase). The calculated magnetic entropy showed the value of S(T) ≈ 1 J/(mol K) which is extremely small; I.e., much lower than the magnetic contribution R ln(2S + 1) = 11.52 J/(mol K) calculated for the spin 3/2.

DOI: 10.12693/APhysPolA.122.1108
PACS numbers: 65.40.Ba, 75.50.Ee, 75.50.Pp