LaMn3Rh4O12: An Antiferromagnetic Quadruple Perovskite Synthesized at High Pressure
LaMn3Rh4O12: An Antiferromagnetic Quadruple Perovskite Synthesized at High Pressure
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LaMn3Rh4O12：高压合成的反铁磁四重钙钛矿
DOI：
10.1021/acs.inorgchem.9b01425
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发表时间：
2019
影响因子：
4.6
通讯作者：
Li Man Rong
中科院分区：
文献类型：
--
作者：
Wu Meixia;Frank Corey E;Han Yifeng;Croft Mark;Walker David;Greenblatt Martha;Li Man Rong
首次在高压（8 GPa）和高温（1423 K）下合成了A' = Mn和B= 4d过渡金属的四重钙钛矿LaMn3Rh4O12。室温粉末X射线衍射表明LaMn3Rh4O12呈立方对称(Im3̅,a= 7.4997(1) Å)。 X 射线吸收近边光谱主要显示 Mn3+ 和 Rh3+ 氧化态。比热测量证实了 TN∼41 K 处的反铁磁转变。电阻率测量表明 300 至 160 K 之间存在三维莫特可变范围跳跃传导机制。
A quadruple perovskite LaMn3Rh4O12withA′ = Mn andB= 4dtransition metal was synthesized at high pressure (8 GPa) and temperature (1423 K) for the first time. Room temperature powder X-ray diffraction indicates that LaMn3Rh4O12forms in cubic symmetry (Im3̅,a= 7.4997(1) Å). X-ray absorption near-edge spectroscopy shows predominantly Mn3+and Rh3+oxidation states. An antiferromagnetic transition atTN∼ 41 K is corroborated by specific heat measurements. The resistivity measurements indicate a three-dimensional Mott variable-range hopping conduction mechanism between 300 and 160 K.