Structural, magnetic and magnetocaloric properties of Ag-doped La0.5Ca0.5−Ag MnO3 compounds with 0 ⩽x⩽ 0.4

Transport properties of silver–calcium doped lanthanum manganite

“…For x ¼0.4, the T MI was 200 K. In general, the transition was correlated to the deviation of Mn 3 þ -O-Mn 4 þ bond angle. In previous studies [19], the results reported by Smari et al show that the values of this angle are very close for x¼ 0, 0.1, 0.2 and 0.3 (161.16°, 159.95°, 160.59°and 162.72°, respectively). For x ¼0.4, the bond angle is greater than the others (165.03°).…”

“…Chemical and structural properties of the samples were presented in a previous work [19]. We summarize the main results that are relevant for electrical and dielectric properties.…”

“…This behavior can be attributed to the existence of secondary phases. Previous work [19] shows that the sample with x ¼0.3 has three phases (magnetic perovskite phase, metallic Ag and Mn 3 O 4 ). For x ¼0.4, the resistivity decreases again.…”

“…The details of the preparation and thermal treatment are described in previous work [19]. The powder is sintered in pellets of 10 mm diameter and approximately 2 mm thickness.…”

“…The effects of substitution of silver ion for A ion have been reported [18,19,11]. The electrical and dielectric properties have rarely been investigated.…”