The effect of manganese doping on the structural, magnetic and dielectric properties of breathing pyrochlore LiInCr4-Mn O8

Crystal structural, magnetic, and dielectric properties of Cobalt−doped breathing pyrochlore LiInCr4−xCoxO8

“…The ferromagnetic and antiferromagnetic phases coexist in the system and magnetic frustration may arise. The M(H) curve does not show a saturated state in the field up to 80 kOe, which indicates the basic antiferromagnetic property and a paramagnetic state [18,19]. Here, the residual entropy confirms the existence of a glass-type phase [18,24].…”

“…LiInCr 4 O 8 is known to be antiferromagnetic. Certainly, the ferromagnetic interaction at low temperatures may also originate from the Co-Co exchange interaction [18]. From previous research, the Cr-Cr interaction is AFM [19].…”

“…Compared with the lattice contribution, the calculated values of C 0 and C 1 are small, which suggests an insulating property for the doped sample. In the inset of figure 6(b), the total entropy S of the sample is determined by integrating C P (T)/T from 1.8 K to 16 K. The sample has a much lower S value than an ideal Ising sample with Cr 3+ (S mag = 4Rln4 = 46.07).Here, the residual entropy confirms the existence of a glass-type phase[18,24].Then, we characterized the dielectric constant (ε r ) and dielectric loss (tanδ) of LiInCr 4−x Co x O 8 compounds in the temperature range of 323 − 573 K at eight different frequencies. Figure7shows the relative dielectric…”

“…From the corresponding M(H) curve, the Co substitution of LiInCr 4 O 8 includes the weak ferromagnetic moment.LiInCr 4 O 8 is known to be antiferromagnetic. Certainly, the ferromagnetic interaction at low temperatures may also originate from the Co-Co exchange interaction[18]. From previous research, the Cr-Cr interaction is AFM[19].…”

“…The ferromagnetic and antiferromagnetic phases coexist in the system and magnetic frustration may arise. The M(H) curve does not show a saturated state in the field up to 80 kOe, which indicates the basic antiferromagnetic property and a paramagnetic state[18,19].Figure 6(a) shows C p versus T of LiInCr 4−x Co x O 8 (x = 0.3) due to further study of the magnetism of the sample. For LiInCr 4 O 8 , a sharp peak at T N = 15.9 K shows long-range order [4].…”