Stress-Induced Domain Wall Motion in a Ferroelastic Mn3+ Spin Crossover Complex

Vibe B. Jakobsen, Elzbieta Trzop, Laurence C. Gavin, Emiel Dobbelaar, Shalinee Chikara, Xiaxin Ding, Kane Esien, Helge Müller-Bunz, Solveig Felton, Vivien S. Zapf, Eric Collet, Michael A. Carpenter, Grace G. Morgan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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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 Mn3+ compound [Mn(3,5-diBr-sal2(323))]BPh4, 1. The first at 250 K, involves the space group change Cc→Pc and is thermodynamically continuous, while the second, Pc→P1 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-P1 transition.

Original languageEnglish
Pages (from-to)13405-13412
Number of pages8
JournalAngewandte Chemie
Issue number32
Publication statusPublished - 08 Jun 2020


  • domain wall
  • ferroelastic materials
  • manganese(III)
  • spin crossover
  • structural phase transition

ASJC Scopus subject areas

  • Engineering(all)


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