Observation of an Iron(II) Spin‐Crossover in an Iron Octacyanoniobate‐Based Magnet

Michio Arai, Wataru Kosaka, Tomoyuki Matsuda, Shin‐ichi Ohkoshi

Angewandte Chemie International Edition · 2008 · 95 citations · 45 references

DOIFull text

Open access

Concepts

Abstract

A spin-crossover from FeII(S=2)-NbIV(S=1/2)-FeII(S=2) to FeII(S=0)-NbIV(S=1/2)-FeII(S=2) occurs in Fe2[Nb(CN)8]⋅(3-pyCH2OH)8⋅4.6 H2O (3-py=3-pyridyl) with decreasing temperature (see picture; red Fe, blue Nb). The low-temperature phase shows ferrimagnetism with a Curie temperature of 12 K owing to an antiferromagnetic interaction between the remaining FeII (S=2) and the NbIV (S=1/2) centers.

References

45