Spin-glass state and magnetic-field-induced phenomena in distorted ${\mathrm{Eu}}_{0.58}$${\mathrm{Sr}}_{0.42}$${\mathrm{MnO}}_3$ perovskite

Magnetic and magnetoresistance measurements were carried out on a distorted perovskite, ${\mathrm{Eu}}_{0.58}$ ${\mathrm{Sr}}_{0.42}$ ${\mathrm{MnO}}_3$. In the absence of applied magnetic field, this compound is an insulator down to 5 K. Results of the ac- and dc-susceptibility measurements suggest a spin-glass ground state. An applied field of 7 T drives the insulator ground state to a ferromagnetic metallic state below ${\mathrm{T}}_{\mathrm{C}}$=120 K. For a range of intermediate fields, the compound undergoes insulator-metal-insulator transitions which resemble those of 1:1 ${\mathrm{Mn}}^{3+}$/${\mathrm{Mn}}^{4+}$ charge-ordered compounds. A temperature-field phase diagram is established which depicts different magnetic and electronic states.