Dielectric and impedance spectroscopy of Sm2CoIrO6 double perovskite

Magnetic and transport properties of the mixed 3d–5d–4f double perovskite Sm2CoIrO6

“…Recently, our group has reported [59] the dielectric and impedance property of SMCO. No anomaly (or, peak) has observed in ε vs T spectra around the magnetic ordering temperature T FiM , and ε almost attains a constant value above 250 K. It is to be mentioned that the peak in thermal variation of first-order derivative of ε with respect to temperature (dε /dT) spectra for f = 1 kHz is centered around 70 K, which is well below the magnetic ordering temperature; whereas, this peak is positioned at 88 K (still below the T FiM ) for f = 10 kHz data (see in figure 8).…”

A combined study on structural, magnetic and specific heat on double perovskite iridates Ln2CoIrO6 [Ln = Pr, Nd]

“…It is worthwhile to say that rare earth magnetic moment also affects the magnetic ground state. Ferrimagnetic (FiM) ground state along with low temperature rare earth ordering and a high value of dielectric permittivity at near room temperature is reported in Sm 2 CoIrO 6 , [16,17] where the A site cation (Sm 3+ ) is slightly magnetic(µ Sm 3+ = 0.85 µ B ). On the other hand, compounds with a highly magnetic A site cation such as DPs Tb 2 CoIrO 6 (µ Tb 3+ = 9.72 µ B and Ho 2 CoIrO 6 (µ Ho 3+ = 10.6 µ B ) exhibit a temperature-induced FiM-to-AFM magnetic phase transition and a field-induced spin-flop-like transition below AFM Néel temperature along with moderate magnetocaloric value [11].…”