Magnetic properties of the multiferroic chromium thio-spinels CdCr2S4 and HgCr2S4Ola Hartmann, Georg Michael Kalvius, Roger Wäppling, Axel Günther, Vladimir Tsurkan, Alex Krimmel and Alois LoidlEur. Phys. J. B, 86 4 (2013) 148DOI: https://doi.org/10.1140/epjb/e2013-31094-4