Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 4787-4792 |
| Number of pages | 6 |
| Journal | Journal of the American Chemical Society |
| Volume | 121 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - May 26 1999 |
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ASJC Scopus subject areas
- Chemistry(all)
Cite this
La4Cu3MoO12 : A novel cuprate with unusual magnetism. / Vander Griend, Douglas A.; Boudin, Sophie; Caignaert, Vincent; Poeppelmeier, Kenneth R; Wang, Yanguo; Dravid, Vinayak P.; Azuma, Masaki; Takano, Mikio; Hu, Zhongbo; Jorgensen, James D.
In: Journal of the American Chemical Society, Vol. 121, No. 20, 26.05.1999, p. 4787-4792.Research output: Contribution to journal › Article
}
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.
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U2 - 10.1021/ja984436e
DO - 10.1021/ja984436e
M3 - Article
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 -