Field-Induced Single-Ion Magnetism Based on Spin-Phonon Relaxation in a Distorted Octahedral High-Spin Cobalt(II) Complex

Ryuta Ishikawa, Yoji Horii, Ryo Nakanishi, Shunya Ueno, Brian K. Breedlove, Masahiro Yamashita, Satoshi Kawata

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The six-coordinate mononuclear high-spin cobalt(II) complex [Co(bpy)2(ClAn)]·EtOH (1; bpy = 2,2′-bipyridine, ClAn2–= chloranilate) and its magnetically diluted analogue [Co0.1Zn0.9(bpy)2(ClAn)]·EtOH (3), in which the CoIIcentres of 1 are partially diluted with the magnetically inactive ZnIIcentres of [Zn(bpy)2(ClAn)]·EtOH (2) as a diamagnetic matrix, exhibited slow magnetic relaxation in applied direct-current (DC) magnetic fields. Fits of the DC magnetic data indicate that this new field-induced single-ion magnet possesses large positive axial and significant rhombic zero-field splittings. The results of temperature-dependent and DC-magnetic-field-dependent alternating-current magnetic measurements on 1 and 3, which is a field-induced single-ion magnet, agree with those from theoretical studies, and spin relaxation occurs through two-phonon Raman and direct spin-phonon bottleneck processes of Kramers ions.

Original languageEnglish
Pages (from-to)3233-3239
Number of pages7
JournalEuropean Journal of Inorganic Chemistry
Volume2016
Issue number20
DOIs
Publication statusPublished - 2016 Jul

Keywords

  • Cobalt
  • Kramers ion
  • Magnetic properties
  • Single-ion magnetism
  • Spin-phonon relaxation
  • Zinc

ASJC Scopus subject areas

  • Inorganic Chemistry

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