期刊信息
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- 刊名: 河北师范大学学报(自然科学版)Journal of Hebei Normal University (Natural Science)
- 主办: 河北师范大学
- ISSN: 1000-5854
- CN: 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
Nb掺杂对双钙钛矿化合物居里温度的影响
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1. 河北师范大学物理学院, 河北石家庄 050016;
2. 石家庄铁道学院数理系, 河北石家庄 050043;
3. 中国科学院物理研究所, 北京 100080 -
DOI:
The Effect of Substituting Nb on the Curie Temperature of Double-perovskite Compounds
摘要/Abstract
研究了双钙钛矿结构化合物Sr2FeMo1-xNbxO6中Mo位的Nb替代效应,发现了在x≤0.40的范围内Nb替代Mo,没有引起样品的结构的变化,但导致了样品的B位离子有序度的降低,抑制了Sr2FeMoO6的铁磁性,使样品的居里温度随Nb的掺入而降低.讨论发现,随着Nb的掺入,Fe3+之间的铁磁性排列的减少,反铁磁性排列的增加是产生上述结果的主要原因.
The effect of substituting Mo by Nb of double perovskite compounds Sr2FeMo1-xNbxO6 has been investigated.The substitution of Nb for Mo in the range of 0≤x≤0.40 does not undergo the structural transition,but reduces the order of the ions at B sites,suppresses the ferromagnetism of Sr2FeMoO6 and lowers the Curie temperature Tc of the compounds.Reducing ferromagnetic coupling and increasing the anti-ferromagnetic coupling between Fe3+ by the substitution of non-magnetic Nb5+ ion are suggested to explain the expermental results.