Influence of Zn2+ doping on the microstructure and magnetic properties of CuFeO2 |
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Affiliation: | School of Physical Science and Technology, Guangxi University, Nanning, 530004, Guangxi, China |
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Abstract: | The mineral delafossite CuFeO2 exhibits triangular spin frustration with strong magnetoelectric coupling and unique magnetic properties. In this work, the crystal structure, microstructure, oxidation states, and magnetic properties of synthetic CuFe1-xZnxO2 samples have been systematically studied with a view to understanding the effect of small amounts of the diamagnetic Zn2+ ion on the magnetoelectric properties of CuFeO2. Samples were confirmed by XRD as having a single-phase delafossite structure, although the introduction of Zn2+ resulted in distortion of the crystal lattice. Addition of Zn2+ also increased the particle size and the number of pores, but did not change the oxidation states of either the Cu or Fe. Magnetic susceptibility measurements show that Zn2+ disrupted the antiferromagnetic structure of the samples, and resulted in generation of significant ferromagnetism. Overall, the magnetic properties of CuFeO2 are closely related to ionic substitution, lattice distortion and microscopic defects. |
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Keywords: | Microstructure-final Magnetic properties |
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