en گروه فیزیکی و عملیات حرارتی Characterization of Physical and Thermal Properties of Materials Research Paper Research Paper <p style="text-align: left;">In this work the procedure to the synthesis of Ba₂GdSbO₆ complex perovskite by the solid-state reaction method is reported. Theoretically a study of the crystalline and electronic structure was performed into the framework of the Density Functional Theory (DFT). The most stable structure is obtained to be a rhombohedral perovskite with a lattice constant <em>a=6,0840 </em><em>&Aring;</em>.&nbsp; Due the occurrence of a mean energy gap of <em>2,84 eV</em> close to the Fermi level for both up and down spin polarizations this material is classifies as insulator.&nbsp; The effective magnetic moment of material obtained from the calculations was 7,0 <em>m_B</em>. The crystalline structure was analyzed through the X-ray diffraction technique and Rietveld refinement of the experimental data. Results are strongly in agreement with those theoretically predicted. Magnetic response was studied from measurements of magnetic susceptibility as a function of temperature. Results reveal the paramagnetic feature of this material in the temperature regime from <em>50 K</em> up to <em>300 K</em>. From the fitting with the Curie law the effective magnetic moment was obtained to be <em>8,1</em> <em>m_B</em>, which is slightly higher that the theoretical value for the <em>Gd³⁺</em> isolated cation predicted by the theory of paramagnetism. The energy gap obtained from experiments of diffuse reflectance is relatively in agreement with the theoretical predictions. The dielectric constant as a function of applied frequencies at room temperature was measured. Results reveal a decreasing behavior with a high value of dielectric constant at low applied frequencies</p> Perovskite material, structure, magnetic feature, electronic properties 1 10 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-1085-1&slc_lang=en&sid=1 R. Moreno Mendoza rmorenom@unal.edu.co 180031947532846005638 180031947532846005638 No Grupo de Física de Nuevos Materiales, Departamento de Física, Universidad Nacional de Colombia, Bogotá D.C., AA 5997, Colombia D. A. Landínez Téllez dalandinezt@unal.edu.co 180031947532846005639 180031947532846005639 No Grupo de Física de Nuevos Materiales, Departamento de Física, Universidad Nacional de Colombia, Bogotá D.C., AA 5997, Colombia R. Cardona Cardona rcardonac@unal.edu.co 180031947532846005640 180031947532846005640 No Grupo de Física de Nuevos Materiales, Departamento de Física, Universidad Nacional de Colombia, Bogotá D.C., AA 5997, Colombia L. A. Carrero Bermúdez lacarrerob@unal.edu.co 180031947532846005641 180031947532846005641 No Grupo de Física de Nuevos Materiales, Departamento de Física, Universidad Nacional de Colombia, Bogotá D.C., AA 5997, Colombia J. Roa-Rojas jroar@unal.edu.co 180031947532846005642 180031947532846005642 Yes Grupo de Física de Nuevos Materiales, Departamento de Física, Universidad Nacional de Colombia, Bogotá D.C., AA 5997, Colombia