β Scribed by Alexei A. Belik; Artem M. Abakumov; Alexander A. Tsirlin; Joke Hadermann; Jungeun Kim; Gustaaf Van Tandeloo; Eiji Takayama-Muromachi
No coin nor oath required. For personal study only.
Structure and Magnetic Properties of BiFe 0.75 Mn 0.25 O 3 Perovskite Prepared at Ambient and High Pressure. -BiFe1-xMnxO3 (0.0 β€ x β€ 0.4) solid solutions are prepared from stoichiometric mixtures of Bi2O3, Fe2O3, and Mn2O3 at 1143 K for 2 h (ambient pressure samples), and at 6 GPa and 1400 K for 90 min (high pressure samples). The phases are characterized by powder XRD, TEM, magnetic measurements, and TB-LMTO-ASA calculations. Ambient pressure BiFe 0.75 Mn 0.25 O 3 crystallizes in the space group R3c with Z = 6 and high pressure BiFe0.75Mn0.25O3 in the space group Pnma with Z = 16 (PbZrO3-related type structure). The structure of the high pressure phase is antiferroelectric and combines an intricate octahedral tilting pattern with displacements of the Bi atoms and deformations of the (FeMn)O6 octahedra. Both ambient and high pressure phases undergo an antiferromagnetic ordering at 485 and 520 K, resp., and develop a weak net magnetic moment at low temperatures. Ceramic samples of ambient pressure BiFe 0.75 Mn 0.25 O 3 show a peculiar phenomenon of magnetization reversal. -(BELIK*, A.
π SIMILAR VOLUMES
## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a βFull Textβ option. The original article is trackable v
## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a βFull Textβ option. The original article is trackable v