Phase transitions with extremely small tetragonal distortion in substitution systems of CoV2O4 by high-angular-resolution synchrotron powder diffraction

Phase transitions with extremely small tetragonal distortion in substitution systems of CoV2O4 by high-angular-resolution synchrotron powder diffraction
复制标题

通过高角分辨率同步加速器粉末衍射观察 CoV2O4 取代系统中具有极小四方畸变的相变

DOI:
10.1016/j.jssc.2019.02.016
复制
发表时间:
2019
影响因子:
3.3
通讯作者:
Kubota Yoshiki
Kubota Yoshiki
中科院分区:
化学3区
文献类型:
--
作者:
Shimono Seiya;Ishibashi Hiroki;Kawaguchi Shogo;Kubota Yoshiki

文献摘要

参考文献

被引文献

相似文献

尖晶石型CoV_2O_4在T ~*= 90 K时发生了ε → ε相变,相变畸变很小(1 -c/a< 0.06%)。另一个伴随空间群变化的结构相变发生在T2 = 59 K。在这项研究中,我们研究了替代效应的连续结构相变,使用高角分辨率的粉末衍射技术,以澄清这些独特的相变的起源。在Cr替代体系Co(V_(1-x)Cr_x)_2 O_4(0 ≤x≤ 0.25)中,这两种结构转变都受到抑制,但在不同的x值处消失。而在Mn替代体系(Co_(1-x)Mn_x)V_2 O_4(0 ≤x≤ 0.2)中,这两种元素都保留了下来。结果表明,T * 和T2处的相变分别与V3+离子的磁相变和轨道自由度有关.
Spinel-type CoV2O4compound shows cubic-to-tetragonal phase transition with a very small distortion (1 –c/a< 0.06%) atT* ∼ 90 K. The other structural phase transition accompanied by change in space group occurs atT2= 59 K. In this study, we investigated the substitution effects on successive structural phase transitions using the high-angular-resolution powder diffraction technique to clarify the origin of these unique phase transitions. In the Cr substitution system Co(V1–xCrx)2O4(0 ≤x≤ 0.25), while both of these structural transitions were suppressed, they disappeared at differentxvalues. By contrast, in the Mn substitution system (Co1–xMnx)V2O4(0 ≤x≤ 0.2), both of them remained. It was suggested that the phase transitions atT* andT2are dominantly related to the magnetic phase transition and orbital degree of freedom of V3+ions, respectively.
Cr 和 Mo 掺杂对尖晶石型 MnV2O4 结构和轨道有序相变的影响
DOI: 10.1143/jpsjs.81sb.sb030
发表时间: 2012
期刊: J. Phys. Soc. Jpn.
影响因子: --
作者:
A. Furukawa and H. Tanaka;Kazuhiro Hemmi
通讯作者: Kazuhiro Hemmi
立方尖晶石的磁转变
DOI: 10.1063/1.1728636
发表时间: 1962
期刊:
影响因子: --
作者:
N. Menyuk;A. Wold;D. B. Rogers;K. Dwight
通讯作者: K. Dwight
近流动 CoV2O4 的结构转变和轨道玻璃物理
DOI: 10.1103/physrevb.93.014437
发表时间: 2015
期刊: Physical Review B
影响因子: 3.7
作者:
D. Reig;D. Casavant;V. Garlea;A. Aczel;Mikhail Feygenson;J. Neuefeind;H. D. Zhou;H. D. Zhou;S. Nagler;S. Nagler;Gregory MacDougall
通讯作者: Gregory MacDougall
DOI: 10.1143/jpsj.77.053708
发表时间: 2008-05-01
影响因子: 1.7
作者:
Katsufuji, Takuro;Suzuki, Takehito;Arima, Taka-hisa
通讯作者: Arima, Taka-hisa