Synthesis and physical properties of double perovskite Pb(2)FeReO(6).
An ordered double perovskite Pb(2)FeReO(6) was prepared at 6 GPa and 1000 degrees C. Despite the presence of Pb(2+) ions at the A site, its crystal structure was determined in a synchrotron X-ray powder diffraction study to be a centrosymmetric one with the space group I4/m (a = 5.62 A and c = 7.95 A). No structural transition to the lower symmetry was observed at temperatures down to 23 K. This compound exhibited a ferrimagnetic transition at 420 K, and its saturation magnetization could be adjusted by using different heat treatments to change the degree of Fe(3+)/Re(5+) ordering.
Nishimura
Kousuke
K
Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan. nishimura@msk.kuicr.kyoto-u.ac.jp
Azuma
Masaki
M
Hirai
Shigeto
S
Takano
Mikio
M
Shimakawa
Yuichi
Y