Magnetism and electronic dynamics in $CuCr_{2-x}Sn_xS_4$ spinels studied by transferred hyperfine fields at $^{119}Sn$ and muon spin rotation and relaxation
We investigated magnetization, muon spin rotation ($\mu$SR), and $^{119}Sn$ M\"{o}ssbauer spectroscopy on Sn substituted $CuCr_{2-x}Sn_xS_4$ (x=0.03 and 0.08) spinel compounds. The magnetization and $\mu$SR results reveal similar additional low-temperature magnetic transitions around 80 K and 4...
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Zusammenfassung: | We investigated magnetization, muon spin rotation ($\mu$SR), and $^{119}Sn$
M\"{o}ssbauer spectroscopy on Sn substituted $CuCr_{2-x}Sn_xS_4$ (x=0.03 and
0.08) spinel compounds. The magnetization and $\mu$SR 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 M\"{o}ssbauer
hyperfine spectra are less pronounced and are discussed in view of the
different positions of the local probes $\mu^+$ and $^{119}Sn$ and their
different magnetic coupling to the magnetic Cr lattice. Above 80 K, both
$\mu$SR and M\"{o}ssbauer 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. |
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DOI: | 10.48550/arxiv.2501.05151 |