反钙钛矿化合物Mn3XN(X=Ni,Zn)的磁结构调控及其相关热膨胀性能研究

来源 :第十二届全国X射线衍射学术大会暨国际衍射数据中心(ICDD)研讨会 | 被引量 : 0次 | 上传用户：aineast

【摘要】

：

通过变温中子粉末衍射结合Rietveld精修方法,我们研究了反钙钛矿化合物Mn3+xNi1-xN和Mn3Zn0.83Mn0.15N0.99的磁结构随温度的演变规律及其相关的热膨胀性能.结果表明:Mn3NiN的

【作者】

：

邓司浩孙莹吴慧黄清镇王蕾史可文宋平王聪

【机构】

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北京航空航天大学物理系,凝聚态物理与材料物理研究中心,北京100191美国国家标准局(NIST)中子研究中心,盖瑟斯堡,马里兰州20899-6102,美国

【出处】

：

第十二届全国X射线衍射学术大会暨国际衍射数据中心(ICDD)研讨会

【发表日期】

：

2015年10期

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通过变温中子粉末衍射结合Rietveld精修方法,我们研究了反钙钛矿化合物Mn3+xNi1-xN和Mn3Zn0.83Mn0.15N0.99的磁结构随温度的演变规律及其相关的热膨胀性能.结果表明:Mn3NiN的磁基态为Γ4g和Γ5g(非共线)反铁磁磁结构共存,Ni位的Mn掺杂可以稳定Γ5g磁结构;Mn3ZnN的磁基态为共线反铁磁,Zn位的Mn掺杂可使得体系基态变为Γ5g磁结构.其中,Γ4g和Γ5g反铁磁共存的Mn3NiN和共线反铁磁的Mn3ZnN均显示正热膨胀行为.与之相反,特殊的Γ5g磁结构具有强的自旋-晶格耦合,该作用可使材料显示出零热膨胀特性.通过调控并获得Mn3XN中的Γ5g磁相,我们探讨了反钙钛矿化合物中的零热膨胀行为.

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