TY - JOUR
T1 - Synthesis and characterization of Sr 3FeMoO 6.88:
T2 - An oxygen-deficient 2D analogue of the double perovskite Sr 2FeMoO 6
AU - Veith, Gabriel M.
AU - Greenblatt, Martha
AU - Croft, Mark
AU - Ramanujachary, K. V.
AU - Hattrick-Simpers, J.
AU - Lofland, Samuel E.
AU - Nowik, Israel
PY - 2005/5/17
Y1 - 2005/5/17
N2 - We have prepared Sr 3FeMoO 6.88(1), an oxygen-deficient two-dimensional analogue of the double perovskite Sr 2FeMoO 6, and have investigated its structure and physical properties. According to powder X-ray and neutron diffraction data, Sr 3FeMoO 6.88 adopts the tetragonal n = 2 Ruddlesden-Popper structure (space group 14/mmm) with a completely disordered B-cation distribution and oxygen vacancies occurring preferentially at the axial 01 sites between the perovskite layers. X-ray absorption near-edge spectroscopy and Mössbauer data are consistent with trivalent Fe and mixed (4+/5+) Mo oxidation state. The compound is semiconducting, showing an intrinsic magnetic transition at ∼85 K and an additional upturn in the magnetic susceptibility at ∼270 K, the latter is associated with intergrowth defects. An appreciable magnetoresistance, reaching the value of ∼-15% at 5 K and 5 T is also observed
AB - We have prepared Sr 3FeMoO 6.88(1), an oxygen-deficient two-dimensional analogue of the double perovskite Sr 2FeMoO 6, and have investigated its structure and physical properties. According to powder X-ray and neutron diffraction data, Sr 3FeMoO 6.88 adopts the tetragonal n = 2 Ruddlesden-Popper structure (space group 14/mmm) with a completely disordered B-cation distribution and oxygen vacancies occurring preferentially at the axial 01 sites between the perovskite layers. X-ray absorption near-edge spectroscopy and Mössbauer data are consistent with trivalent Fe and mixed (4+/5+) Mo oxidation state. The compound is semiconducting, showing an intrinsic magnetic transition at ∼85 K and an additional upturn in the magnetic susceptibility at ∼270 K, the latter is associated with intergrowth defects. An appreciable magnetoresistance, reaching the value of ∼-15% at 5 K and 5 T is also observed
UR - http://www.scopus.com/inward/record.url?scp=19944394532&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=19944394532&partnerID=8YFLogxK
U2 - 10.1021/cm048839r
DO - 10.1021/cm048839r
M3 - Article
AN - SCOPUS:19944394532
SN - 0897-4756
VL - 17
SP - 2562
EP - 2567
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 10
ER -