Magnetic and Ferroelectric Properties of New Potential Magnetic Multiferroic [N(C2H54]2CoCl2Br2 |
| V. Kapustianyka, B. Cristóvãob, D. Osypiukb, Yu. Eliyashevskyya, Yu. Chorniia, B. Sadovyib
aDepartment of Solid State Physics, Faculty of Physics, Ivan Franko National University of Lviv, Dragomanova Str. 50, 79005 Lviv, Ukraine bDepartment of General and Coordination Chemistry and Crystallography, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University in Lublin, Maria Curie-Skłodowska Sq. 2, 20-031 Lublin, Poland |
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| The paper is devoted to study of the magnetic and ferroelectric properties of [N(C2H5)4]2CoCl2Br2 (TEACCB-2) solid solution. Investigations of the temperature dependence of the spontaneous polarization confirmed existence of the improper ferroelectric phase in this crystal. The anomalies corresponding to the ferroelectric phase transition were also observed in the temperature dependences of the inverse magnetic susceptibility - respectively at 227.7 K and 226.4 K, depending on the orientation of the magnetic field. These anomalies confirm both ferromagnetic interactions in a very small temperature range around this point and the spontaneous magnetoelectric effect arising in the phase, which simultaneously is improper ferroelectric and paramagnetic. Observation of such an effect testifies that the ferroelectric ordering is closely connected with magnetic interactions between Co2+ ions. The analyzed Co(II) complexes are monomeric and are characterized by antiferromagnetic interaction (θ<0 K) around the central ion. |
DOI:10.12693/APhysPolA.140.450 topics: multiferroic, magnetic properties, ferroelectric, magnetoelectric effect |