Magnetodielectricity in a Manganites

Near-Room-Temperature Colossal Magnetodielectricity and Multiglass Properties in Partially Disordered La2NiMnO6.
D. Choudhury, P. Mandal, R. Mathieu, A. Hazarika, S. Rajan, A. Sundaresan, U.V. Waghmare, R. Knut,O. Karis, P. Nordblad, and D. D. Sarma
Phys. Rev. Lett. 108, 127201 (2012)

See also:
Charge Hopping in Glassy Magnets.
Gavin Lawes
Physica 5, 35 (2012)

(a) FC ZFC DC magnetization data, with an applied magnetic field (H) of 20 Oe. (b) The imaginary parts of AC susceptibility, with H =4 Oe. (c) Same as in (b), but focusing on the low-temperature region. (d) ZFC data with and without an intermediate wait (TW) at 25 K for 6000 seconds, showing distinct memory effects at TW as illustrated in the inset with a difference plot.