  The polycrystalline co-doped samples of Sm0.5Y0.5Fe0.58Mn0.42O3 were prepared
by solid-state reaction route and its various physical properties with their
correlations have been investigated. The dc magnetization measurements on the
sample revealed a weak ferromagnetic (WFM) transition at TN=361 K that is
followed by an incomplete spin reorientation (SR) transition at TSR1= 348 K. A
first order magnetic transition (FOMT) around 292 K completes the spin
reorientation transition and the material enters into a nearly collinear
antiferromagnetic (AFM) state for T < 260 K. The compound exhibited
magnetization reversal below the compensation temperature (Tcomp) = 92 K at low
measured field of 100 Oe. At further low temperature below 71 K, the compound
also exhibited Zero-field cooled memory effects confirming a reentrant
spinglass state formation. Robust magnetodielectric (MD) magnetoelectric
coupling has been established in the present material through field dependent
dielectric and resistivity measurements. True ferroelectric transition with a
considerable value of saturation polarization (= 0.06 micro C/cm2 at 15 K) have
been found in the specimen below TFE= 108 K. We observed an intense spin-phonon
coupling (SPC) across TSR and TN from the temperature dependent Raman
spectroscopy and is responsible for the intrinsic magnetoelectric effect. This
SPC also stabilizes the ferroelectric state below TFE in the material. The
delicate interplay of the lattice (Phonons), charge and spins governs the
observed features in the investigated physical properties of the material that
makes the specimen a promising multifunctional material.
