Debye temperature of single-crystal Cr with incommensurate and commensurate magnetic structure

¹ AGH University of Science and Technology, Faculty of Physics and Applied Computer Science PL-30-059 Kraków, Poland
² AGH University of Science and Technology, Academic Center for Materials and Nanotechnology PL-30-059 Kraków, Poland

Received: 7 March 2019
Accepted: 15 July 2019

Abstract

Single crystals of Cr and Cr3%Mn doped with ∼0.2 at.% ¹¹⁹Sn were studied by means of ¹¹⁹Sn-site Mössbauer spectroscopy. Mössbauer spectra recorded in the temperature range of 78–300 K were analyzed using a hyperfine field distribution method. Additionally, the spectra recorded on the Cr3%Mn sample were analyzed in terms of three sextets. Derived therefrom values of a center shift, CS, were fitted to the Debye model yielded values of the Debye temperature, for Cr and for Cr3%Mn. The difference in the -value can be regarded as evidence that a spin-phonon coupling is different for the incommensurate and commensurate antiferromagnetic magnetic structure of chromium.