Magnetic-order-induced ferroelectric polarization in the polar antiferromagnets RFeWO6 ( R = Sm, Gd, Er, and Tm)

Organic–inorganic one-dimensional hybrid aggregates constructed from aromatic-bisphosphonate-functionalized polyoxomolybdates

“…As for 4 and 5 , the observed χ M T values were 22.89 and 13.15 cm 3 K mol −1 at 300 K, respectively, higher than the expected values of two non-interacting Tm 3+ ions (14.30 cm 3 K mol −1 , 3 H 6 , g = 7/6) and Yb 3+ ions (5.14 cm 3 K mol −1 , 2 F 7/2 , g = 8/7). 28 During the cooling process, the χ M T values of 4 and 5 decreased slowly and reached the minimum values of 10.70 cm 3 K mol −1 for 4 and 2.72 cm 3 K mol −1 for 5 at 1.8 K. These thermal dependences of χ M T in the two compounds were due to the depopulation of the excited electronic (Stark) levels caused by the crystal field effect. 29 Also, curve fitting for 1/ χ M versus T plots of 4 ( C = 14.75 cm 3 K mol −1 , Θ = −1.62 K) and 5 ( C = 21.14 cm 3 K mol −1 , Θ = −221.29 K) conformed to the Curie–Weiss law, exhibiting anti-ferromagnetic coupling (Fig.…”

Magnetic-field-induced ferroelectric states in centrosymmetric R2BaCuO5 ( R=Dy and Ho)

“…It plays a pivotal role in deciding the properties of materials, such as magnetoresistance, superconductivity, magnetoelectricity, and most importantly, a wide variety of magnetic orderings. It is known that the interplay of 4 f and 3d electrons of rare-earth (R) and transition metals (TMs), respectively, plays a crucial role in the magnetic properties and associated magnetoelectric coupling [1][2][3][4][5]. Furthermore, research on linear magnetoelectric and multiferroic materials has been a subject of interest because of the fundamental physics of strong coupling between spin and lattice degrees of freedom and their application potential, such as nonvolatile magnetoelectric memory, spintronic devices, etc.…”