Abstract
We explore how thermal expansion influences the magnetic interactions in hybrid frameworks.
Highlights
Metal–organic frameworks (MOFs), consisting of small metal clusters connected by organic linkers, have received great interest due to the tunability inherent from the many possible combinations of metal and ligand.[1]
The magnetic coupling between two transition metal atoms is sensitive to the length and geometry of the super-exchange pathway, which can be varied by the rich choice of organic building blocks.[8]
A number of MOFs have already been synthesized with interesting magnetic properties such as low-dimensional magnetism,[8,9,10] spin-flop transitions,[11] magnetocaloric effects[12,13,14] and magnetoelastic coupling.[15,16]
Summary
Metal–organic frameworks (MOFs), consisting of small metal clusters connected by organic linkers, have received great interest due to the tunability inherent from the many possible combinations of metal and ligand.[1] Initial studies focused on porous structures because of their promising applications within gas storage[2] and catalysis.[3] More recently attention has been drawn to properties typical of purely inorganic materials such as multiferroics[4,5,6] and extended magnetic ordering.[7] These are often observed in dense frameworks which have shorter connection paths between the metal atoms than their porous counterparts. A number of MOFs have already been synthesized with interesting magnetic properties such as low-dimensional magnetism,[8,9,10] spin-flop transitions,[11] magnetocaloric effects[12,13,14] and magnetoelastic coupling.[15,16] These effects are readily identified experimentally, there is a need for a deeper theoretical understanding in order to direct further synthesis
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