Observation of antiferromagnetism in marokite CaMn2O4

Citation
Cd. Ling et al., Observation of antiferromagnetism in marokite CaMn2O4, J SOL ST CH, 160(1), 2001, pp. 167-173
Citations number
6
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF SOLID STATE CHEMISTRY
ISSN journal
00224596 → ACNP
Volume
160
Issue
1
Year of publication
2001
Pages
167 - 173
Database
ISI
SICI code
0022-4596(200108)160:1<167:OOAIMC>2.0.ZU;2-U
Abstract
Marokite (CaMn2O4) has been identified as a low-level impurity in the solid -state synthesis of Ca1-xLaxMnO3 perovskites in the low-x region. In order to properly isolate the complex magnetic behavior of these important perovs kites, the low-temperature magnetic structure and properties of marokite ar e determined and reported. All Mn ions are in the high-spin 3 + oxidation s tate. Jahn-Teller-distorted NIMO, octahedra share both edges and vertices i n a three-dimensional network, through which various exchange mechanisms co operatively give rise to antiferromagnetic Mn3+ spin order. The magnetic or der is evidenced below T-N = 220 K by a peak in the magnetic susceptibility and the appearance of symmetry-lowering magnetic Bragg reflections in neut ron diffraction. (C) 2001 Academic Press.