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Stress‐Induced Domain Wall Motion in a Ferroelastic Mn 3+ Spin Crossover Complex
Author(s) -
Jakobsen Vibe B.,
Trzop Elzbieta,
Gavin Laurence C.,
Dobbelaar Emiel,
Chikara Shalinee,
Ding Xiaxin,
Esien Kane,
MüllerBunz Helge,
Felton Solveig,
Zapf Vivien S.,
Collet Eric,
Carpenter Michael A.,
Morgan Grace G.
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202003041
Subject(s) - spin crossover , condensed matter physics , domain wall (magnetism) , chemistry , ferroelasticity , crystallography , phase transition , spin (aerodynamics) , phase (matter) , nuclear magnetic resonance , materials science , physics , magnetization , thermodynamics , optoelectronics , organic chemistry , quantum mechanics , magnetic field , dielectric , ferroelectricity
Abstract Domain wall motion is detected for the first time during the transition to a ferroelastic and spin state ordered phase of a spin crossover complex. Single‐crystal X‐ray diffraction and resonant ultrasound spectroscopy (RUS) revealed two distinct symmetry‐breaking phase transitions in the mononuclear Mn 3+ compound [Mn(3,5‐diBr‐sal 2 (323))]BPh 4 , 1. The first at 250 K, involves the space group change Cc → Pc and is thermodynamically continuous, while the second, Pc → P 1 at 85 K, is discontinuous and related to spin crossover and spin state ordering. Stress‐induced domain wall mobility was interpreted on the basis of a steep increase in acoustic loss immediately below the the Pc ‐ P 1 transition