Electrical Behavior of New Orthophosphates Na2M3(PO4)3 (M3=GaMn2, GaCd2, InMn2 and FeMnCd) with Alluaudite-Like Structure |
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| Authors: | C DurioA Daidouh N ChouaibiC Pico ML Veiga |
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| Institution: | a Departamento de Qu?́mica Inorgánica I, Facultad de Ciencias Qu?́micas, Universidad Complutense, 28040, Madridty, Spainb Département de Chimie, Faculté des Sciences de Tetouan, Université Abdelmalek Essaidi, Tetouan, Morocco |
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| Abstract: | New sodium orthophosphates of general formula Na2M3(PO4)3 belonging to the alluaudite-type structure have been synthesized and characterized by neutron and X-ray powder diffraction. The nature of the M3 elements (M3=GaMn2, GaCd2, InMn2 and FeMnCd) was chosen in order to analyze their influence on electrical and magnetic properties. The conductivity of these materials was measured by the complex impedance method and the transport mechanism was studied from complex permittivities and modulus formalism. Electrical results including charge/discharge experiments showed two main behaviors: GaCd2 and FeMnCd behave as purely ionic conductors whereas GaMn2 and InMn2 are mixed ionic-electronic conductors. The magnetic susceptibility data reveal the antiferromagnetic behavior of FeMnCd, InMn2 and GaMn2, with a weak ferromagnetic transition at low temperatures. |
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| Keywords: | orthophosphates alluaudite structure electrical conductivity antiferromagnetic behaviour |
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