A large barrier to magnetization reversal, a signature of a good single-molecule magnet (SMM), strongly depends on the structural environment of a paramagnetic metal ion. In a crystalline state, where SMM properties are usually measured, this environment is influenced by crystal packing, which may be different for the same chemical compound, as in polymorphs. Here we show that polymorphism can dramatically change the magnetic behavior of an SMM even with a very rigid coordination geometry. For a cobalt(II) clathrochelate, it results in an increase of the effective barrier from 109 to 180 cm, the latter value being the largest one reported to date for cobalt-based SMMs. Our finding thus highlights the importance of identifying possible polymorphic phases in search of new, even more efficient SMMs.

Download full-text PDF

Source
http://dx.doi.org/10.1021/acs.jpclett.6b02091DOI Listing

Publication Analysis

Top Keywords

barrier magnetization
8
polymorphism cobalt-based
4
cobalt-based single-ion
4
single-ion magnet
4
magnet tuning
4
tuning barrier
4
magnetization relaxation
4
relaxation large
4
large barrier
4
magnetization reversal
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!