Magnetism and electronic dynamics in CuCr2-xSnxS4 spinels studied by transferred hyperfine fields at 119Sn and muon spin rotation and relaxation

Elaheh Sadrollahi (), Cynthia P. C. Medrano, Magno A. V. Heringer, E. M. Baggio Saitovitch, Lilian Prodan, Vladimir Tsurkan and F. Jochen Litterst
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Elaheh Sadrollahi: Technische Universität Dresden
Cynthia P. C. Medrano: Centro Brasileiro de Pesquisas Físicas
Magno A. V. Heringer: Centro Brasileiro de Pesquisas Físicas
E. M. Baggio Saitovitch: Centro Brasileiro de Pesquisas Físicas
Lilian Prodan: University of Augsburg
Vladimir Tsurkan: University of Augsburg
F. Jochen Litterst: Technische Universität Braunschweig

The European Physical Journal B: Condensed Matter and Complex Systems, 2025, vol. 98, issue 9, 1-13

Abstract: Abstract We investigated magnetization, muon spin rotation and relaxation (µSR), and 119Sn Mössbauer spectroscopy on Sn substituted CuCr2-xSnxS4 (x = 0.03 and 0.08) spinel compounds. The magnetization and µSR results reveal similar additional low-temperature magnetic transitions around 80 K and 40 K as found for the undoped material, indicating a magnetic ground state deviating from a simple collinear ferromagnet. The observed changes in the Mössbauer spectra are less pronounced and are discussed in view of the different positions of the local probes µ+ and 119Sn and their different magnetic coupling to the magnetic Cr lattice. Above 80 K, both µSR and Mössbauer spectra show temperature-dependent inhomogeneous broadening either due to structural or charge disorder and changing spin dynamics that can be related to a precursor magnetic phase above the well-defined static low-temperature phase. Graphical abstract

Date: 2025
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DOI: 10.1140/epjb/s10051-025-01046-6

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