Coexistence of Spin–Lattice Relaxation and Phonon-Bottleneck Processes in GdIII–Phthlocyaninato Triple-Decker Complexes under Highly Diluted Conditions

Yoji Horii, Keiichi Katoh, Yuji Miyazaki, Marko Damjanović, Tetsu Sato, Liviu Ungur, Liviu F. Chibotaru, Brian K. Breedlove, Motohiro Nakano, Wolfgang Wernsdorfer, Masahiro Yamashita

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Gd3+ complexes have been shown to undergo unusual slow magnetic relaxation processes similar to those of single-molecule magnets (SMMs), even though Gd3+ does not exhibit strong magnetic anisotropy. To reveal the origin of the slow magnetic relaxation of Gd3+ complexes, we have investigated the magnetic properties and heat capacities of two Gd3+-phthalocyaninato triple-decker complexes, one of which has intramolecular Gd3+–Gd3+ interactions and the other does not. It was found that the Gd3+–Gd3+ interactions accelerate the magnetic relaxation processes. In addition, magnetically diluted samples, prepared by doping a small amount of the Gd3+ complexes into a large amount of diamagnetic Y3+ complexes, underwent dual magnetic relaxation processes. A detailed dynamic magnetic analysis revealed that the coexistence of spin–lattice relaxation and phonon-bottleneck processes is the origin of the dual magnetic relaxation processes.

Original languageEnglish
Pages (from-to)8076-8082
Number of pages7
JournalChemistry - A European Journal
Issue number36
Publication statusPublished - 2020 Jun 26
Externally publishedYes


  • gadolinium
  • magnetic properties
  • phonon-bottleneck effect
  • porphyrinoids
  • spin–lattice relaxation

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry


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