119Sn Hyperfine Fields in RMn6Sn6 (R = Mg, Zr, Hf). Experimental and Theoretical Study

T. Mazeta, J. Tobołab, G. Venturinia and B. Malamana a Laboratoire de Chimie du Solide Minéral, Université Henri Poincaré-Nancy I, associé au CNRS, UMR 7555, B.P. 239, 54506 Vandoeuvre les Nancy Cedex, France b Faculty of Physics and Nuclear Techniques, Academy of Mining and Metallurgy Al. Mickiewicza 30, 30-059 Kraków, Poland

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We performed both 119Sn Möossbauer experiments and electronic structure calculations using the Korringa-Kohn-Rostoker method on the hexagonal RMn6Sn6 (R = Mg, Zr, and Hf) compounds. According to previous neutron diffraction results two types of commensurate magnetic order are investigated: ferromagnetic for R = Mg and antiferromagnetic for R = Zr and Hf. From 119Sn Möossbauer measurements, high transferred hyperfine fields on the tin nuclei are observed. The Hhf values are well supported by the Korringa-Kohn- Rostoker results. Moreover, the calculated μMn are in good agreement with the neutron diffraction data. When observing the density of states, ZrMn6Sn6 is found near semimetallic limit.

DOI: 10.12693/APhysPolA.97.737 PACS numbers: 76.60.Jx, 76.30.Lh, 71.15.Mb, 75.20.En