Magnetic ground state of a highly two-dimensional spin-1/2 antiferromagnet

The physics of low-dimensional magnets is starkly different to that of more traditional isotropic materials. Novel phase transitions and exotic phenomena are expected in highly 1D and 2D magnets. The theory of such systems was the subject of the 2016 Nobel Prize in Physics. However, creating real low-dimensional materials in which these theories can be tested has proven to be difficult. Progress in this area has been made in recent years by looking at materials in which the magnetic ions are held apart by molecular bridges. We have recently characterised one of the most 2D spin-1/2 antiferromagnets yet discovered. We propose to determine the magnetic ground state of this system, a challenging prospect due to the low-spin density and small ordered moment expected in very 2D magnets. However, if this experiment is possible anywhere, it is at the WISH instrument at ISIS.