在Sm2MnMn中有三个具有不同阴离子顺序的矿相,MnMn(Mn4-xSbx) O12
Xuan Liang1,2, Kazunari Yamaura1,2, Alexei A Belik1
1Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Ibaraki, 305-0044, Japan.
Chemistry (Weinheim an der Bergstrasse, Germany)
|May 22, 2024
概括
在Sm2MnMn(Mn4-xSbx) O12中与Sb5+进行性注,可以控制矿的离子顺序. 这种操纵影响了这些四重矿固体溶液的磁性.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 磁力学 磁力学 是一种
背景情况:
- 阴离子顺序对于确定矿材料的性质至关重要.
- 控制阴离子顺序通常通过合成条件和静电测量来实现.
- 异性兴奋剂提供了一种潜在的途径来调整阳离子排序.
研究的目的:
- 为了研究Sb5+与Sb5+异质合剂对Sm2MnMn(Mn4-xSbx) O12四重矿固体溶液中的阴离子顺序的影响.
- 探索受控的阴离子排序如何影响这些材料的磁性.
主要方法:
- 合成Sm2MnMn(Mn4-xSbx) O12固体溶液的0.4≤x≤2使用高压,高温方法 (6 GPa, 1770 K).
- 结构性特征,以识别不同的排序区域.
- 测量磁性特性以确定铁磁过渡温度 (Tc).
主要成果:
- 确定了三个不同的阴离子排序区域:0.5≤x≤1.0 (B位失序,A位柱状排序),x=1.5-1.6 (B位岩盐排序,A位柱状排序),x=1.8 (B位岩盐排序,A位柱状排序).
- 基里温度 (Tc) 在这些区域之间有所变化,在0.5≤x≤1.0时从35K增加到73K,在x=1.5-1.6时达到81K,在x=1.8.6时降至53K.
- 确定的空间组包括P42/nmc,P42/n和P21/n,对应于不同的阴子排序状态.
结论:
- 用Sb5+进行性兴奋剂有效地控制了Sm2MnMn(Mn4-xSbx) O12四重矿中A和B位点上的阴离子顺序.
- 观察到的阴离子排序显著影响合成材料的磁性过渡温度.
- 这项研究表明,通过受控的有价兴奋剂和随后的离子排序来调整矿材料的磁性行为.
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