Röntgenograpliische und magnetische Untersuchungen an perowskitverwandten Cyanoverbindungen CsMIIMIII(CN)6 / X-Ray and Magnetic Studies of Perovskite-Related Cyano Compounds CsMIIMIII (CN)6
Röntgenograpliische und magnetische Untersuchungen an perowskitverwandten Cyanoverbindungen CsMIIMIII(CN)6 / X-Ray and Magnetic Studies of Perovskite-Related Cyano Compounds CsMIIMIII (CN)6
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钙钛矿相关氰基化合物 CsMIIMIII (CN)6 的 X 射线和磁性研究
DOI：
10.1515/znb-1982-0709
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发表时间：
1982
期刊：
影响因子：
--
通讯作者：
D. Babel
中科院分区：
文献类型：
--
作者：
W. Griebler;D. Babel
本文报道了钙钛矿型氰基化合物CsMIICr（CN）6（MII = Mn，Zn），CsZnFe（CN）6和CsMnCo（CN）6（Mn = Mn-Cu）的红外活性C-N和MIII-CN伸缩频率，晶格常数和磁化率（4.2 -295 K）。除了CsCuCo（CN）6，这是四方扭曲，所有的化合物结晶立方面心（晶格常数在1020至1084 pm的范围内）。磁性行为表明低自旋MIII和高自旋MII状态，支持严格有序的MIII-CN-MII排列的IR证据。化合物CsMnCr（CN）6是亚铁磁性的，其Néel温度为TN = 90 K，外推的自发磁化强度在0 K时为a = 2，30 μB.通过氰基桥的超交换相互作用被认为是负责所观察到的亚铁磁性。
Abstract The perovskite-related cyano compounds CsMIICr(CN)6 (MII = Mn, Zn), CsZnFe(CN)6 and CsMnCo(CN)6 (Mn = Mn-Cu) are characterized by their IR active C - N and MIII-CN stretching frequencies, their lattice constants and their magnetic susceptibilities (4,2-295 K). Except for CsCuCo(CN)6, which is tetragonally distorted, all compounds crystallize cubically face-centered (with lattice constants in the range from 1020 to 1084 pm). The magnetic behaviour indicates low spin MIII and high spin MII states, supporting the IR evidence for a strictly ordered MIII-CN-MII arrangement. The compound CsMnCr(CN)6 is ferrimagnetic, with a Néel temperature of TN = 90 K and an extrapolated spontaneous magnetization of a = 2,30 μB at 0 K. Superexchange interactions via the cyano bridges are considered responsible for the ferrimagnetism observed.