This article is cited in 2 papers

Magnetism

Magnetic phases in Pr$_{0.5}$Sr$_{0.5}$Mn$_{1-x}$Co$_x$O$_3$ ($x\le$ 0.5) solid solutions

I. O. Troyanchuk^a, A. N. Chobot^a, N. V. Tereshko^a, O. S. Mantytskaya^a, E. A. Efimova<sup>b

a</sup> Scientific-Practical Materials Research Centre of NAS of Belarus
^b Joint Institute for Nuclear Research, Dubna, Moscow region

Abstract: The magnetic and magnetotransport properties of Pr$_{0.5}$Sr$_{0.5}$Mn$_{1-x}$Co$_x$O$_3$ ($x\le$ 0.5) solid solutions have been investigated using neutron diffraction methods. The magnetization and electrical conductivity have been measured in magnetic fields up to 140 kOe. It has been established that, during cooling in the temperature range from 160 to 110 K, the compounds of compositions with a cobalt content $x\le$ 0.07 undergo a structural phase transition from the high-temperature ferromagnetic phase to the antiferromagnetic phase. A further substitution of cobalt for manganese leads to a stabilization of the inhomogeneous dielectric ferromagnetic state, whereas a state of the cluster spin-glass type has been revealed in compositions with $x$ = 0.15 and 0.20. At $x\ge$ 0.25, a new magnetic phase with a Curie temperature up to 210 K is formed as a result of the magnetic interaction between manganese and cobalt ions. A magnetic phase diagram of the system under investigation has been constructed.

Received: 30.11.2010

 English version: Physics of the Solid State, 2011, 53:7, 1340–1347

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