  We report an observation of room temperature magnetodielectric (RTMD) effect
in Mn doped LaGaO3. Results of frequency dependent magnetoresistance (FDMR)
measurements discards the possibility of any magnetoresistive contribution in
the observed MD effect. The intrinsic nature of MD coupling has been
validated/evidenced by means of magnetic field dependent Raman spectroscopy and
explained in terms of modified volume strain governed by magnetic field induced
rerotation of spin coupled Mn-orbitals. Ultimately, present RTMD effect is
attributed to magneto-compression/magnetostriction associated with spin-phonon
coupling as evidenced in the form of magnetic field induced hardening of
symmetric stretching (SS) MnO6 octahedral Raman modes. Presently studied Mn
doped LaGaO3 can be a candidate for magnetodielectric applications.
