Magnetoelectric effect in the honeycomb-lattice antiferromagnet BaNi2(PO4)2

Chromium doped NH2(CH3)2Ga(SO4)2 × 6H2O crystal – representative of a new family of magnetoelectric materials

“…Additional fruitful information about the nature of the ME coupling can be obtained from the behaviour of the pyroelectric current around the ferroelectric phase transition under the external magnetic field [50,51]. The temperature dependences of the spontaneous polarization obtained from the temperature dependences of pyrocurrent at different values of applied magnetic field confirm its considerable influence on the spontaneous polarization and the phase transition temperature (figure 7).…”

Magnetic toroidicity

“…For example, the lowsymmetry 1 ′ MPG allows toroidal moments along any of x, y, and z. Real material candidates for this case include the magnetic states of NaCrSi 2 O 6 [11], BaNi 2 (PO 4 ) 2 [12], CaMnGe 2 O 6 [13], MnPSe 3 [14], CaMn 2 Sb 2 [15], and YbMn 2 Sb 2 [16]. It turns out that the requirement for offdiagonal linear magnetoelectricity along x and y is broken…”

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

“…Later, this field evolved into multiferroics where spontaneous magnetization and electric * sundaresan@jncasr.ac.in polarization coexist with a varying degree of coupling, depending on the origin of ferroelectricity [1,2,16,17]. Several materials have been reported to be linear magnetoelectric where TM or R ions are solely responsible for the magnetoelectricity [18][19][20][21][22][23][24][25][26][27]. However, only a few materials are known to exhibit the linear magnetoelectric effect or ferroelectricity resulting from the 4 f -3d coupling [3,28,29].…”