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在经历集体 Jahn-Teller 畸变的 RbMnFe 电荷转移材料中受应变影响的铁弹畴壁。

Strain-affected ferroelastic domain walls in RbMnFe charge-transfer materials undergoing collective Jahn-Teller distortion.

作者信息

Hervé Marius, Akagi Shintaro, Guérin Laurent, Gee Leland B, Ribson Ryan D, Chollet Matthieu, Cammarata Marco, Nagashima Shuntaro, Ohkoshi Shin-Ichi, Tokoro Hiroko, Collet Eric

机构信息

Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251 35000 Rennes France

CNRS, Univ Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL 2015, The University of Tokyo 7-3-1 Hongo Tokyo 113-0033 Japan.

出版信息

RSC Adv. 2024 Nov 4;14(47):35081-35089. doi: 10.1039/d4ra06397j. eCollection 2024 Oct 29.

DOI:10.1039/d4ra06397j
PMID:39497769
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11533542/
Abstract

Many rubidium manganese hexacyanoferrate materials, with the general formula Rb Mn[Fe(CN)]·HO, exhibit diverse charge-transfer-based functionalities due to the bistability between a high temperature Mn( = 5/2)Fe( = 1/2) cubic phase and a low-temperature Mn( = 2)Fe( = 0) tetragonal phase. The collective Jahn-Teller distortion on the Mn sites is responsible for the cubic-to-tetragonal ferroelastic phase transition, which is associated with the appearance of ferroelastic domains. In this study, we use X-ray diffraction to reveal the coexistence of 3 types of ferroelastic tetragonal domains and estimate the spatial extension of the strain around the domain walls, which represents about 30% of the volume of the crystal.

摘要

许多通式为Rb Mn[Fe(CN)]·HO的铷锰六氰合铁酸盐材料，由于高温Mn( = 5/2)Fe( = 1/2)立方相和低温Mn( = 2)Fe( = 0)四方相之间的双稳态，呈现出多种基于电荷转移的功能。Mn位点上的集体 Jahn-Teller 畸变导致立方到四方的铁弹相变，这与铁弹畴的出现有关。在本研究中，我们使用X射线衍射揭示了3种铁弹四方畴的共存，并估计了畴壁周围应变的空间扩展，其约占晶体体积的30%。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fde2/11533542/a7b59474d764/d4ra06397j-f7.jpg
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