Temperature dependences of the in-phase component of ac susceptibility χ′ of Bi0.4Ca0.6Mn1 − x Ru x O3 with (a) x = 0 and (b) x = 0.1 measured at probing field 10 Oe for different frequencies. The inset of (b) shows a jump in χ′ at T C, in an extended scale. (c) dχ′/dT vs. T plot for x = 0.1 in an extended scale. The arrow indicates the temperature of maximum in χ′ at 10 kHz. (d) The log(τ) vs. log[(T f − T g)/T g] linear dependence for x = 0.1 and the best fitted line. (e) Temperature dependence of χ′ of Bi0.4Ca0.6Mn1 − x Ru x O3 with x = 0.2 at 10 Oe for different frequencies. The inset shows a broad peak of χ′, in an extended scale.
(a) Temperature dependences of ZFC and FC magnetization of Bi0.4Ca0.6Mn1 − x Ru x O3 (x = 0.1, 0.2) measured at 100 Oe, at P = 0 and under pressure. (b) Thermoremanent magnetization curves recorded at H = 0, after FC in H = 15 kOe, at P = 0 and under pressure.
(a) ZFC magnetization hysteresis loops of Bi0.4Ca0.6Mn1 − x Ru x O3 (x = 0, 0.1, 0.2) measured at 10 K and at P = 0. Inset shows the FC hysteresis loops in an extended scale for x = 0.1 compound measured with H cool = 15 kOe at two temperatures and at P = 0. FC magnetization hysteresis loops for (b) x = 0.1 and (c) x = 0.2 compounds measured after FC at H cool = 15 kOe for several temperatures at P = 0 and under pressure. Insets show hysteresis loops at 10 K and under pressure in an extended scale, exhibiting (b) EB effect for x = 0.1 and (c) no EB for x = 0.2 compounds. The size of symbols in the insets is bigger than the error of measured magnetization M.
Temperature dependences of (a) spontaneous magnetization M S and (b) coercive field H C for Bi0.4Ca0.6Mn1 − x Ru x O3 (x = 0.1, 0.2) at P = 0 and under pressure.
Temperature dependences of EB field H E and normalized remanence asymmetry M E/M S for Bi0.4Ca0.6Mn0.9Ru0.1O3 at ambient pressure and the values obtained at pressure of 10.3 kbar and 10 K (solid symbols). The inset shows a linear correlation between M E/M S and H E.
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