MAGNETIC PROPERTY AND CRYSTAL CHEMISTRY OF ILMENITE (METIO3) AND HEMATITE (ALPHA-FE2O3) SYSTEM .2. MAGNETIC PROPERTY
MAGNETIC PROPERTY AND CRYSTAL CHEMISTRY OF ILMENITE (METIO3) AND HEMATITE (ALPHA-FE2O3) SYSTEM .2. MAGNETIC PROPERTY
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DOI：
10.1143/jpsj.13.1298
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发表时间：
1958-01-01
影响因子：
1.7
通讯作者：
AKIMOTO, S
中科院分区：
文献类型：
--
作者：
ISHIKAWA, Y;AKIMOTO, S
研究了钛铁矿（MgTiO 3、MnTiO 3、FeTiO 3、CoTiO 3和NiTiO 3）和赤铁矿（αFe 2 O3）合成固溶体的磁性，证实了钛铁矿-赤铁矿系列固溶体可分为3部分：i）纯钛铁矿，ii）具有R\bar3晶体对称性的固溶体和iii）具有R\bar3c晶体对称性的固溶体。纯钛铁矿是反铁磁性的，除MgTiO 3外，其Néel温度低于80 K，MnTiO 3的Néel温度为41 K。具有R\bar3对称性的固溶体除MgTiO 3系列为顺磁性外，其余均为亚铁磁性. FeTiO 3、CoTiO 3和NiTiO 3系列的铁磁性是由相同的机理引起的，而MnTiO 3系列的铁磁性是由不同的机理引起的。具有R\bar3c对称性的固溶体也是反铁磁性体，其上叠加了弱铁磁性。
Magnetic properties of synthesized solid solutions of ilmenite (MgTiO 3, MnTiO 3, FeTiO 3, CoTiO 3 and NiTiO 3) and hematite (αFe 2 O 3) are investigated and it was confirmed that those of any ilmenite-hematite series can be divided into three parts: i) pure ilmenite, ii) solid solutions with R\bar3 crystal symmetry and iii) those with R\bar3c crystal symmetry. Pure ilmenites are antiferromagnetics having their Néel temperature below 80 K except MgTiO 3, the Néel temperature of MnTiO 3 being determined to be 41 K. The solid solutions with R\bar3 symmetry are ferrimagnetic except MgTiO 3 series which is paramagnetic. Ferrimagnetism in FeTiO 3, CoTiO 3 and NiTiO 3 series is due to the same mechanism, while that in MnTiO 3 series to the different one. The solid solutions with R\bar3c symmetry are again antiferromagnetics on which feeble ferromagnetism is superimposed.