TY - JOUR
T1 - La4Cu3MoO12
T2 - A novel cuprate with unusual magnetism
AU - Vander Griend, Douglas A.
AU - Boudin, Sophie
AU - Caignaert, Vincent
AU - Poeppelmeier, Kenneth R.
AU - Wang, Yanguo
AU - Dravid, Vinayak P.
AU - Azuma, Masaki
AU - Takano, Mikio
AU - Hu, Zhongbo
AU - Jorgensen, James D.
PY - 1999/5/26
Y1 - 1999/5/26
N2 - La4Cu3MoO12 is a new (ABO3)(n=4) cuprate with mixed B-cations in a ratio of 1:3. When synthesized at ambient pressure, the structure is not perovskite as expected but rather a homeotype of YAlO3, a rare-earth hexagonal phase. While the P63/mmc and Pmnm space groups can be used to model average structures which appear in quenched samples; powder, electron, and neutron diffraction data all confirm that a slow-cooled sample crystallizes in the monoclinic space group, P1121/m. The copper and molybdenum are coordinated by oxygen in corner-sharing trigonal bipyramids that are sandwiched between layers of lanthanum cations. In the B-cation layer, the copper cations order into a kagome-like lattice of triangular clusters. The magnetism has been measured from 2 to 800 K and is highly influenced by the geometric arrangement of the Cu(II) cations. An antiferromagnetic transition occurs at 5 K, but the sample does not reach a purely paramagnetic state until 460 K.
AB - La4Cu3MoO12 is a new (ABO3)(n=4) cuprate with mixed B-cations in a ratio of 1:3. When synthesized at ambient pressure, the structure is not perovskite as expected but rather a homeotype of YAlO3, a rare-earth hexagonal phase. While the P63/mmc and Pmnm space groups can be used to model average structures which appear in quenched samples; powder, electron, and neutron diffraction data all confirm that a slow-cooled sample crystallizes in the monoclinic space group, P1121/m. The copper and molybdenum are coordinated by oxygen in corner-sharing trigonal bipyramids that are sandwiched between layers of lanthanum cations. In the B-cation layer, the copper cations order into a kagome-like lattice of triangular clusters. The magnetism has been measured from 2 to 800 K and is highly influenced by the geometric arrangement of the Cu(II) cations. An antiferromagnetic transition occurs at 5 K, but the sample does not reach a purely paramagnetic state until 460 K.
UR - http://www.scopus.com/inward/record.url?scp=0033606282&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033606282&partnerID=8YFLogxK
U2 - 10.1021/ja984436e
DO - 10.1021/ja984436e
M3 - Article
AN - SCOPUS:0033606282
VL - 121
SP - 4787
EP - 4792
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 20
ER -