NEUTRON-DIFFRACTION STUDIES OF CAMN2GE2 AND BAMN2GE2 COMPOUNDS - 1ST EXAMPLES OF ANTIFERROMAGNETIC MN PLANES IN THCR2SI2-TYPE STRUCTURE COMPOUNDS

Authors
MALAMAN B VENTURINI G WELTER R RESSOUCHE E
Citation
B. Malaman et al., NEUTRON-DIFFRACTION STUDIES OF CAMN2GE2 AND BAMN2GE2 COMPOUNDS - 1ST EXAMPLES OF ANTIFERROMAGNETIC MN PLANES IN THCR2SI2-TYPE STRUCTURE COMPOUNDS, Journal of alloys and compounds, 210(1-2), 1994, pp. 209-212
Citations number
19
Categorie Soggetti
Chemistry Physical","Metallurgy & Mining","Material Science
Journal title
Journal of alloys and compounds → ACNP
ISSN journal
09258388
Volume
210
Issue
1-2
Year of publication
1994
Pages
209 - 212
Database
ISI
SICI code
0925-8388(1994)210:1-2<209:NSOCAB>2.0.ZU;2-P
Abstract
The magnetic properties of ThCr2Si2-type structure CaMn2Ge2 and BaMn2G e2 compounds have been investigated by neutron diffraction experiments . In the whole temperature range studied (2-270 K), both compounds are purely collinear antiferromagnets (not detected by bulk magnetometric measurements) characterized by a stacking of antiferromagnetic (001) Mn planes. This peculiar Mn-sublattice magnetic behaviour seems to be related to the valency of the large metal. At 2 K, the total Mn moment s are about 2.7 mu(B) and 3.6 mu(B) for CaMn2Ge2 and BaMn2Ge2, respect ively. The results are compared with those of closely related RMnSi an d RMnGe compounds and the isotypic alkali-metal manganese pnictides. T he magnetic properties of the ThCr2Si2-type structure RMn2X2 (X-Si, Ge ) compounds are discussed.