Negative Thermal Expansion and Magnetic Transition in Anti‐Perovskite Structured Mn3Zn1−xSnxN Compounds
Negative Thermal Expansion and Magnetic Transition in Anti‐Perovskite Structured Mn3Zn1−xSnxN Compounds
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DOI：
10.1111/j.1551-2916.2010.03711.x
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发表时间：
2010-08
影响因子：
3.9
通讯作者：
Ying Sun;Cong Wang;Yongchun Wen;Lihua Chu;H. Pan;M. Nie;M. Tang
中科院分区：
文献类型：
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作者：
Ying Sun;Cong Wang;Yongchun Wen;Lihua Chu;H. Pan;M. Nie;M. Tang
采用变温X射线粉末衍射法研究了Mn 3 Zn 1 −xSnxN（x=0.1，0.2，0.3，0.5，0.8，1.0）化合物的热膨胀性能。随着Sn含量的增加，Mn 3 Zn 1 −xSnxN的热膨胀行为从正变为负，并在磁转变温度范围附近恢复为正。此外，磁转变温度从185 K提高到495 K.有趣的是，Mn 3 Zn 1 −xSnxN的反常热膨胀行为与Zn位上的价电子数有关，三价电子的等效效应有利于表现负热膨胀。此外，随着Sn含量的增加，由于Mn-Mn间距的增加，反铁磁有序态逐渐发生倾斜。
The thermal expansion properties of Mn3Zn1−xSnxN (x=0.1, 0.2, 0.3, 0.5, 0.8, 1.0) compounds were investigated by variable temperature X-ray powder diffraction. With increasing Sn content, the thermal expansion behavior of Mn3Zn1−xSnxN changes from positive to negative and returns to positive near the magnetic transition temperature range. Moreover, the magnetic transition temperature increases from 185 to 495 K. It is interesting that the abnormal thermal expansion behavior of Mn3Zn1−xSnxN is related to the number of valence electrons on Zn site and the equivalent effect with three valence electrons is beneficial for displaying negative thermal expansion. In addition, the antiferromagnetic order state gradually canted with the increasing Sn content due to the increase of Mn–Mn distance.