Fig. 1. (Color online) (a) XRD patterns of Na_1.1(Zn_{1 –y}Mn_y)Sb (0.05 ≤y ≤ 0.40). (b) Crystal structure of Na(Zn,Mn)Sb. (c) Cell volume of Na_1+x(Zn_{1 –y}Mn_y)Sb for various doping concentrations of Na and Mn. (d) XRD patterns of single crystal Na_1.09(Zn_0.88Mn_0.12)Sb and Na_1.12(Zn_0.36Mn_0.64)Sb.

Fig. 2. (Color online) (a) The DC magnetization measured in Na_1.1(Zn_{1 –y}Mn_y)Sb, (0.05 ≤ y ≤ 0.4) in H = 500 Oe with ZFC and FC procedures. (b)M(H) curves measured at 2 K for Na_1.1(Zn_{1 –y}Mn_y)Sb. (c)M(T) and M (H) curves for single crystal Na_1.12(Zn_0.36Mn_0.64)​​​​​​​Sb.

Fig. 3. (Color online) (a) AC χ'(T) and χ''(T) of Na_1.1(Zn_0.75Mn_0.25)Sb at various frequencies. (b) The best fit ofT_f data extracted from Fig. 3(a) to the Eq. (2).

Fig. 4. (Color online) (a) Temperature dependence of resistivity for NaZnSb. The inset shows hall resisitivity for NaZnSb at 2 and 50 K. (b) Hall resisitivity of Na_1.09(Zn_0.88Mn_0.12)Sb at various temperature. (c) Temperature dependence of resistivity of Na_1.1(Zn_0.95Mg_0.05)Sb and Na_1.1(Zn_0.95Mn_0.05)Sb. Note that amplitude is normalized.

Fig. 5. (Color online) (a)ρ(T) of single crystal Na_1.09(Zn_0.88Mn_0.12)Sb at various applied fields. (b) MR(H) curves of single crystal Na_1.09(Zn_0.88Mn_0.12)Sb at various temperature. (c)ρ(T) of single crystal Na_1.12(Zn_0.36Mn_0.64)Sb at various applied fields. (d) MR(H) curves of single crystal Na_1.12(Zn_0.36Mn_0.64)Sb at various temperature.