ACTA

Structure and Hyperfine Interactions of Mechanically Activated Delafossite CuFeO₂

K. Siedliska^a, T. Pikula^a, D. Oleszak^b and E. Jartych^a
^aInstitute of Electronics and Information Technology, Lublin University of Technology, ul. Nadbystrzycka 38a, 20-618 Lublin, Poland
^bFaculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland

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Delafossite CuFeO₂ belongs to multiferroic class of materials. In this work, copper ferrite was prepared by mechanical activation with subsequent thermal treatment. X-ray diffraction and Mössbauer spectroscopy were used as complementary methods to study the structure and hyperfine interactions of the material. As proved by X-ray diffraction, CuFeO₂ compound was obtained with relatively low amount of secondary phases like CuO and CuFe₂O₄. The Mössbauer spectroscopy revealed paramagnetic character of the compound at room temperature. The purest delafossite CuFeO₂ was obtained by mechanical activation of pre-milled precursors and sintering at 1173 K. The temperature of thermal treatment is lower by 100 K as compared to the traditional solid-state synthesis.

DOI: 10.12693/APhysPolA.133.372
PACS numbers: 75.85.+t, 31.30.Gs, 76.80.+y