Properties of RBaCuFeO5+δ (R = Y, La, Pr, Nd, Sm-Lu)

Electrical and Thermal Conduction Behaviors in La‐Substituted GdBaCuFeO5+δ Ceramics

“…(b), the Gd 1− x La x BaCuFeO 5+δ ceramics (0 ≤ x ≤ 0.4) are found to be thermally stable (only 0.4% weight loss at most) in the whole temperature, whereas a large weight loss can be observed in the compound with x = 0.5 at 700 K. One of the possible reasons may be the sample is regarded as the ferrocuprate solid solution between GdBaCuFeO 5+δ and LaBaCuFeO 5+δ . In addition, some articles have reported that the electrical conductivity of LaBaCuFeO 5+δ decreases due to the release of weakly bonded oxygen . Thus, in the present case, the decrease in the electrical conductivity of Gd 0.5 La 0.5 BaCuFeO 5+δ may be dominated by the transport properties of LaBaCuFeO 5+δ .…”

“…. Most of them have tetragonal structure with space groups of P 4 mm or P 4/ mmm , while LaBaCuFeO 5+δ has a cubic structure with a space group Pm 3 m due to a little difference on the ionic radius between La 3+ and Ba 2+ . The current research on these materials mainly focused on their structure, magnetic, and electrical performance.…”

“…have pointed out a relationship between structure and magnetic properties of LaBaCoCuO 5+δ . What's more, Klyndyuk et al . have mainly investigated the electrical and thermoelectric properties of RBaCuFeO 5+δ .…”

Enhanced Thermoelectric Performance of SmBaCuFeO5+δ/Ag Composite Ceramics

“…After Er‐Rakho et al synthesized and studied a new oxygen‐deficient perovskite YBaCuFeO 5+δ for the first time, its natural layered structure and excellent superconductive performance have been extensively researched in recent years. The double perovskite‐like oxide has a general formula of A′A″B 2 O 5+δ , where A′ is rare‐earth element, A″ is alkaline‐earth element, and B is transition metal . As shown in Fig.…”

“…, the basic pyramid structure which consists of B site atoms and oxygen atoms forms the main structure, and A site atoms penetrate the frame to compose the border . The crystal structure of the large family members is tetragonal with a space group P 4 mm or P 4/ mmm . During the past few years, the electrical properties and thermoelectric performance of A′A″B 2 O 5+δ ‐type compounds have attracted researchers' attention.…”