ACTA

Manifestation of Spin-Glass-Like Behavior in the Organometallic Magnet

V.P. Dyakonov^a,c, M. Arciszewska^a, W. Dobrowolski^a, A. Szewczyk^a, H. Szymczak^a, E. Aksymentieva^b, V. Varyukhin^c, E. Zubov^c and M.U. Gutowska^a
^a Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland
^b Lviv State University, Lviv, Ukraine
^c Donetsk Physico-Technical Institute, Ukraine

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Ac susceptibility (χ_ac) and dc magnetization (M_dc) of the organometallic magnet Na[FeO₆(C₁₀H₈N)₃] have been studied in temperature range of 4.2-200 K, in an external magnetic field up to 16 kOe. Some peculiarities of the χ_ac and M _dc behavior, which are characteristic of spin-glasses, e.g. cusps in the susceptibility and zero-field-cooled magnetization, an irreversibility between the field-cooled and zero-field-cooled magnetization and dependences of the T_cusp temperature on the frequency and the intensity of the magnetic field, were observed at low temperatures.

DOI: 10.12693/APhysPolA.97.863
PACS numbers: 75.30.Kz, 75.40.Cx