Mild hydrothermal synthesis,isomorphous substitution,crystal structure characterization and magnetic properties of BaMP2O7 (M = Mn,Cu) |
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| Institution: | 1. CFNUL – Centre for Nuclear Physics of the University of Lisbon, 1649-003 Lisbon, Portugal;2. IFIMUP and IN-Institute of Nanoscience and Nanotechnology, Department of Physics and Astronomy, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal;3. Department of Physics, University of Minho, 4800-058 Guimarães, Portugal;1. Institute of Solid State Physics, TU Wien, A-1040 Wien, Austria;2. Dipartimento di Chimica, Università degli Studi di Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy;4. Institute of Materials Chemistry and Research, University of Vienna, A-1090 Vienna, Austria;1. Cátedra de Botánica General, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSE Ciudad Autónoma de Buenos Aires, Argentina, Argentina;2. Member of Carrera del Investigador, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina;3. Laboratorio de Anatomía Vegetal Aplicada, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, C1428EHA. Ciudad Autónoma de Buenos Aires, Argentina;4. Instituto de Botánica Darwinion, Labardén 200, San Isidro, B1642HYD Buenos Aires, Argentina, Argentina;5. Member of Carrera del Investigador, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina;1. Faculty of Polymer Engineering & Color Tech., Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran;2. Color and Polymer Research Center (CPRC), Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran |
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| Abstract: | At mild hydrothermal conditions triclinic modifications of BaMP2O7 (M = Mn and/or Cu) have been succeeded. The method offers cheap, one step, impurity free and chemical flexible fabrication of family of metal phosphates that are potential low-dimensional quantum magnets. Partial isomorphous substitution of the Mn2+ by Cu2+ resulted into mixed-metal solid that has been structurally and magnetically characterized. Rietveld refinement study confirmed the structures and revealed the influence of transition metal substitution. The temperature-dependent magnetic measurements revealed that the system is paramagnetic in almost all temperature range and an apparent antiferromagnetic phase transition occurs around 5 K. Using the Curie–Weiss law, a Curie–Weiss temperature, θP = −11.0 K, and a Curie constant C = 3.39 emu K mol−1 was obtained. The small negative θP value and the χT behavior as a function of temperature reveal a weak antiferromagnetic interaction between the Cu2+/Mn2+magnetic centers. |
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| Keywords: | Hydrothermal synthesis Metal phosphate Crystal structure Rietveld Magnetic properties |
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