Spin order in the charge disproportionated phases of the A -site layer ordered triple perovskite LaC a 2 F e 3 O 9

Spin order in the charge disproportionated phases of the A -site layer ordered triple perovskite LaC a 2 F e 3 O 9
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A位层有序三重钙钛矿LaC a 2 F e 3 O 9 的电荷歧化相中的自旋顺序

DOI:
10.1103/physrevb.97.024421
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发表时间:
2018
期刊:
影响因子:
3.7
通讯作者:
Arevalo-Lopez A
Arevalo-Lopez A
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Arevalo-Lopez A

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本文用中子粉末衍射研究了氧化物中自旋与电荷交换态之间的耦合。该位层有序的三重钙钛矿在冷却时发生电荷双反,并呈现两种不同的电荷有序模式。在230 K时,Al_2O_3以2:1的比例沿准立方晶胞方向沿着排列。在较低的温度下,电荷有序模式改变为沿沿着的层状排列。中子粉末衍射数据表明,在中温区(),阳离子的自旋在平面上有序排列成摆线结构,而阳离子保持顺磁性。在最低温度范围(),自旋结构遵循电荷有序化,并演化为层状磁结构。
The coupling between spins and charge disproportionation states has been investigated in theoxide with neutron powder diffraction. This-site layer ordered triple perovskiteundergoes charge disproportionation on cooling and shows two different charge ordering patterns. At 230 K,disproportionates into a 2:1 ratio of, which order in a layered manner along thedirection of the pseudocubic unit cell. At lower temperatures, the charge ordering pattern changes to a layered arrangement along thedirection. Neutron powder diffraction data show that in the intermediate temperature range () the spins order into a cycloidal structure on theplane for thecations while thecations remain paramagnetic. For the lowest temperature range (), the spin structure follows the charge ordering and evolves to alayered magnetic structure.
DOI: 10.1038/srep00449
发表时间: 2012
期刊: SCIENTIFIC REPORTS
影响因子: 4.6
作者:
Chen, Wei-Tin;Saito, Takashi;Hayashi, Naoaki;Takano, Mikio;Shimakawa, Yuichi
通讯作者: Shimakawa, Yuichi
含有异常高价 Fe 的钙钛矿结构氧化物的晶体和磁性结构
DOI: --
发表时间: 2019
期刊:
影响因子: --
作者:
Nishikawa T.;and S. Ide;Y. Shimakawa
通讯作者: Y. Shimakawa