Publication detail

Trigonally Distorted Hexacoordinate Co(II) Single-Ion Magnets

NEMEC, I. FELLNER, O. INDRUCHOVÁ, B. HERCHEL, R.

Original Title

Trigonally Distorted Hexacoordinate Co(II) Single-Ion Magnets

Type

journal article in Web of Science

Language

English

Original Abstract

By simple reactions involving various cobalt(II) carboxylates (acetate and in situ prepared pivalate and 4-hydroxybenzoate salts) and neocuproine (neo), we were able to prepare three different carboxylate complexes with the general formula [Co(neo)(RCOO)(2)] (R = -CH3 for 1, (CH3)(3)C- for 2, and 4OH-C4H6- for 3). The [Co(neo)(RCOO)(2)] molecules in the crystal structures of 1-3 adopt a rather distorted coordination environment, with the largest trigonal distortion observed for 1, whereas 2 and 3 are similarly distorted from ideal octahedral geometry. The combined theoretical and experimental investigations of magnetic properties revealed that the spin Hamiltonian formalism was not a valid approach and the L-S Hamiltonian had to be used to reveal very large magnetic anisotropies for 1-3. The measurements of AC susceptibility showed that all three compounds exhibited slow-relaxation of magnetization in a weak external static magnetic field, and thus can be classified as field-induced single-ion magnets. It is noteworthy that 1 also exhibits a weak AC signal in a zero-external magnetic field.

Keywords

single-ion magnets; magnetic anisotropy; cobalt(II)

Authors

NEMEC, I.; FELLNER, O.; INDRUCHOVÁ, B.; HERCHEL, R.

Released

29. 1. 2022

Publisher

MDPI

Location

BASEL

ISBN

1996-1944

Periodical

Materials

Year of study

15

Number

3

State

Swiss Confederation

Pages from

1064

Pages to

1064

Pages count

15

URL

https://www.mdpi.com/1996-1944/15/3/1064

Full text in the Digital Library

http://hdl.handle.net/11012/204574

BibTex

@article{BUT177357,
  author="Ivan {Nemec} and Ondřej František {Fellner} and Berenika {Indruchová} and Radovan {Herchel}",
  title="Trigonally Distorted Hexacoordinate Co(II) Single-Ion Magnets",
  journal="Materials",
  year="2022",
  volume="15",
  number="3",
  pages="1064--1064",
  doi="10.3390/ma15031064",
  issn="1996-1944",
  url="https://www.mdpi.com/1996-1944/15/3/1064"
}