Griffiths phase in solid-solution of ferromagnetic manganite and cobaltite

D. Bhoi; N. Khan; A. Midya; A. Hassen; P. Mandal; P. Chudhury

paper

Griffiths phase in solid-solution of ferromagnetic manganite and cobaltite

arXiv:1109.1090

Abstract

We report the existence of Griffiths phase (GP) over a wide range of $x$ in La $_{0.6}$ Sr $_{0.4}$ Mn $_{1 - x}$ Co $_{x}$ O $_{3}$ , the solid solution of ferromagnetic (FM) La $_{0.6}$ Sr $_{0.4}$ MnO $_{3}$ and La $_{0.6}$ Sr $_{0.4}$ CoO $_{3}$ , from magnetization measurements. In this compound, GP arises due to the quenching of randomly distributed Co-O-Mn antiferromagnetic bonds in the FM background. In contrary to divalent doped manganites, GP in the present system can exist entirely in the metallic state above $T_{C}$ (for $x$ $<$ 0.10). Based on the present study, a magnetoelectronic phase diagram is drawn.

5 pages, 3 Figures