Abstract
Magnetic susceptibility χ of Bi2−xMnxSe3 (x = 0.01–0.2) was measured in the temperature range 4.2–300 K. For all the samples, a Curie–Weiss behaviour of was revealed with effective magnetic moments of Mn ions corresponding to the spin value S = 5/2, which couple antiferromagnetically with the paramagnetic Curie temperature K. In addition, for the samples of nominal composition x = 0.1 and 0.2 the effect of a hydrostatic pressure P up to 2 kbar on χ has been measured at fixed temperatures 78 and 300 K that allowed to estimate the pressure derivative of to be K kbar−1. Based on the observed behaviour of with varied Mn concentration and pressure, a possible mechanism of interaction between localized Mn moments is discussed.
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