Synthesis and Magnetic Properties of a Novel Birnessite Oxide Cs0.24MnO2 |
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| Authors: | PAN Ying-Zhen QiU Xiao-Qing QIHE Ri-Ma LI Li-Ping |
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| Institution: | State Key Laboratory of Structural Chemistry, Fujian Institute of Research on theStructure of Matter, The Chinese Academy of Sciences, Fuzhou, Fujian 350002, China |
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| Abstract: | The synthesis of a novel birnessite structure manganese oxide,Cs0.24MnO2,via a modified sol-gel route is reported in this work.The product was characterized b X-ray diffraction (XRD),transmission electron microscopy(TEM),thermogravimetric analysis(TGA),and magnetic susceptibility.It is found that Cs0.24MnO2 crystallizes in a monoclinic phase with a nanosheet morphology.With lowering the temperature,Cs0.24MnO2 shows an antiferromagnetic transition at about 43.8 K.which is different from its paramagnetic K-counterpart.The effective moment of Mn ions in Cs0.24MnO2 is determined to be 4.2μB,indicating a mixed valence of Mn4 /Mn3 . |
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| Keywords: | birnessite magnetic antiferromagnetic |
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