ETUDE DE NIOBATES ET TANTALATES DE METAUX DE TRANSITION BIVALENTS

ETUDE DE NIOBATES ET TANTALATES DE METAUX DE TRANSITION BIVALENTS
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DOI:
10.1016/0022-3697(61)90103-2
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发表时间:
1961-01-01
影响因子:
4
通讯作者:
PAUTHENET, R
PAUTHENET, R
中科院分区:
材料科学3区
文献类型:
--
作者:
BERTAUT, EF;CORLISS, L;PAUTHENET, R

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用X射线衍射研究了A2 M4 O 9(A= Nb,Ta; M= Mn,Fe,Co,Mg)的结构。它是由阳离子A和M有序化而形成的α-Al 2 O 9型结构.最可能的空间群是P3 <$c1。磁性测量和中子衍射显示了Nb 2 Mn 4 O 9和Nb 2Co 4 O 9的反铁磁性质。自旋形成沿着线1 3 2 3 z(+自旋)和2 3 1 3 z(-自旋)的链。
The structure of A 2 M 4 O 9 (A= Nb, Ta; M= Mn, Fe, Co, Mg) has been studied by X-rays. It derives from the corundum type structure (α—Al 2 O 9) by an ordering of the cations A and M. The most probable space group is P 3̄ c 1. Magnetic measurements and neutron diffraction show up the antiferromagnetic nature of Nb 2 Mn 4 O 9 and Nb 2 Co 4 O 9. The spins form chains along the lines 1 3 2 3 z (+ spins) and 2 3 1 3 z (− spins).