%0 Journal Article %T Structural and magnetic properties of frustrated GaxMn(3-x)O4(1.2 ≤ x ≤ 1.6) spinels %+ Institut des Sciences Chimiques de Rennes (ISCR) %+ Université Hassan II [Casablanca] (UH2MC) %+ CIC ENERGIGUNE - Parque Tecnol Alava %A Mehdaoui, Boubker %A Moubah, R. %A Orayech, B. %A Bahout, M. %A Peña, O. %A Jáuregui, M. %A Saurel, D. %A El Bouari, A. %< avec comité de lecture %@ 0925-8388 %J Journal of Alloys and Compounds %I Elsevier %V 748 %P 528-536 %8 2018-06 %D 2018 %R 10.1016/j.jallcom.2018.03.164 %K Cation distribution %K Ferrimagnetism %K Magnetic frustration %K Spin wave stiffness parameter %K Spinel %Z Chemical Sciences/Material chemistryJournal articles %X We report a systematic study of the structural and magnetic properties of frustrated compounds of GaxMn(3−x)O4 (1.2 ≤ x ≤ 1.6) prepared by solid-state reaction. Using Rietveld refinement of X-ray diffraction patterns and O'Neill-Navrotsky model, we demonstrate that the system GaxMn(3−x)O4 (1.2 ≤ x ≤ 1.6) is an inverse spinel with low inversion parameter, in which Ga3+ replaces Mn3+ cations located in B-sites. The inverse magnetic susceptibility, the shape of ZFC/FC magnetization curves at low temperatures, the existence of hysteresis in all compounds, the frustration parameter and the spontaneous magnetization analysis show that the compounds with x = 1.2–1.4 exhibit a non-collinear ferrimagnetic order and the compounds with x = 1.5–1.6 exhibit a frustrated non-collinear ferrimagnetic order. Spin wave stiffness parameters were determined for each composition using the fitting results of spontaneous magnetization curves. It is demonstrated that for the compounds x = 1.2–1.4 with a non-frustrated ferrimagnetic order, the change of spontaneous magnetization Ms(T) obeys to Bloch's law (T3/2). For x = 1.5–1.6, the compounds exhibit a frustrated ferrimagnetic order, and the Ms(T) shows a deviation from Bloch's law. %G English %2 https://univ-rennes.hal.science/hal-01774414/document %2 https://univ-rennes.hal.science/hal-01774414/file/Mehdaoui%20et%20al_Structural%20and%20magnetic%20properties%20of%20frustrated%20GaxMn%283-x%29O%281.pdf %L hal-01774414 %U https://univ-rennes.hal.science/hal-01774414 %~ UNIV-RENNES1 %~ CNRS %~ INSA-RENNES %~ ENSC-RENNES %~ ISCR %~ ISCR-CSM %~ STATS-UR1 %~ UR1-SPM %~ INC-CNRS %~ UR1-UFR-SPM %~ UR1-HAL %~ UR1-SDLM %~ TEST-UR-CSS %~ UNIV-RENNES %~ INSA-GROUPE %~ TEST-HALCNRS %~ UR1-MMS %~ TEST2-HALCNRS