Magnetic order of Mn5Si3-type Tb5Sb3 and Tb5Si1.5Sb1.5
Magnetic order of Mn5Si3-type Tb5Sb3 and Tb5Si1.5Sb1.5
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Mn5Si3型Tb5Sb3和Tb5Si1.5Sb1.5的磁序
DOI：
10.1016/j.jmmm.2011.07.004
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
O. Isnard
中科院分区：
文献类型：
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作者：
A. Morozkin;O. Isnard
用中子衍射方法研究了Tb_5Sb_3和Tb_5Si_1.5Sb_1.5化合物（六方晶系Mn_5Si_3型，hP_16，P_63/mcm）的磁结构。中子衍射结果的温度依赖性证明了这些金属间化合物表现出复杂的磁有序性。Tb_5Sb_3在150、119、85、70和54 K冷却时呈现出顺磁体→反铁磁平螺旋→铁磁锥→反铁磁斜锥→斜AF→正弦调制AF五种连续的磁结构变化; Tb_5Si_1.5Sb_1.5在123和66 K冷却时呈现出顺磁体→正弦调制反铁磁体Ⅰ →正弦调制反铁磁体Ⅱ两种连续的磁结构变化。Tb_5Si_3、Tb_5Sb_3和Tb_5Si_1.5Sb_1.5在整个温度范围内具有不同的磁结构。
Neutron diffraction study has been performed on the Tb5Sb3and Tb5Si1.5Sb1.5compounds (hexagonal Mn5Si3-type, hP16, P63/mcm) to understand their magnetic structures. The temperature dependence of neutron diffraction results proves that these intermetallics show a complex magnetic ordering. The Tb5Sb3presents five subsequent changes in magnetic structure at ∼150, 119, 85, 70 and 54K on cooling: paramagnet→antiferromagnetic flat spiral→ferromagnetic cone→antiferromagnetically canted ferromagnetic cone→canted AF→sine modulated AF. The Tb5Si1.5Sb1.5shows two subsequent changes in magnetic structure at 123 and 66K: paramagnet→sine modulated antiferromagnet I→sine modulated antiferromagnet II. The Tb5Si3, Tb5Sb3and Tb5Si1.5Sb1.5have the different magnetic structure in the full temperature range.