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Low‐Temperature Cationic Rearrangement in a Bulk Metal Oxide
Author(s) -
Li ManRong,
Retuerto Maria,
Stephens Peter W.,
Croft Mark,
Sheptyakov Denis,
Pomjakushin Vladimir,
Deng Zheng,
Akamatsu Hirofumi,
Gopalan Venkatraman,
SánchezBenítez Javier,
Saouma Felix O.,
Jang Joon I.,
Walker David,
Greenblatt Martha
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201511360
Subject(s) - cationic polymerization , ionic bonding , oxide , chemical physics , neutron diffraction , materials science , synchrotron , ambient pressure , chemistry , crystallography , ion , thermodynamics , crystal structure , organic chemistry , metallurgy , physics , nuclear physics , polymer chemistry
Cationic rearrangement is a compelling strategy for producing desirable physical properties by atomic‐scale manipulation. However, activating ionic diffusion typically requires high temperature, and in some cases also high pressure in bulk oxide materials. Herein, we present the cationic rearrangement in bulk Mn 2 FeMoO 6 at unparalleled low temperatures of 150–300 o C. The irreversible ionic motion at ambient pressure, as evidenced by real‐time powder synchrotron X‐ray and neutron diffraction, and second harmonic generation, leads to a transition from a Ni 3 TeO 6 –type to an ordered‐ilmenite structure, and dramatic changes of the electrical and magnetic properties. This work demonstrates a remarkable cationic rearrangement, with corresponding large changes in the physical properties in a bulk oxide at unprecedented low temperatures.