Phase separation and zero thermal expansion in antiperovskite Mn3Zn0.77Mn0.19N0.94: An in situ neutron diffraction investigation

Phase separation and zero thermal expansion in antiperovskite Mn3Zn0.77Mn0.19N0.94: An in situ neutron diffraction investigation
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反钙钛矿 Mn3Zn0.77Mn0.19N0.94 中的相分离和零热膨胀:原位中子衍射研究

DOI:
10.1016/j.scriptamat.2017.10.031
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发表时间:
2018-03
期刊:
影响因子:
6
通讯作者:
Cong Wang
Cong Wang
中科院分区:
材料科学1区
文献类型:
--
作者:
Sihao Deng;Ying Sun;Hui Wu;Zaixing Shi;Lei Wang;Jun Yan;Kewen Shi;Pengwei Hu;Xungang Diao;Qingzhen Huang;Christoph Sürgers;Cong Wang

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在5 - 300 K温度范围内用原位中子粉末衍射(NPD)研究了反钙钛矿结构的Mn_3Zn_(0.77)Mn_(0.19)N_(0.94)。首次发现了反钙钛矿中存在着不同晶格参数的非共线反铁磁/共线亚铁磁相分离。NPD结果表明,Mn3Zn 0. 77Mn 0. 19N 0. 94合金在110 K以下的零热膨胀行为是由非共线反铁磁相,甚至是与共线亚铁磁相共存的反铁磁相引起的。这些发现表明Mn3ZnN基材料可以为进一步探索反钙钛矿的非共线磁性PS和相关物理性质开辟新的途径。
The antiperovskite Mn3Zn0.77Mn0.19N0.94was investigated byin situneutron powder diffraction (NPD) in the temperature region 5–300 K. Here, a noncollinear-antiferromagnetic/collinear-ferrimagnetic phase separation (PS) showing different lattice parameters was firstly revealed in antiperovskites. The NPD results prove that the noncollinear antiferromagnetic phase, even coexisting with the collinear ferrimagnetic phase, could be responsible for the zero thermal expansion behavior of Mn3Zn0.77Mn0.19N0.94below 110 K. These findings suggest that Mn3ZnN based materials could open a new avenue for further exploring the noncollinear magnetic PS and correlated physical properties of antiperovskites.
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