Neutron diffraction of field induced magnon condensation in the spin dimerized antiferromagnet Sr3Cr2O8

In this work, we investigate the evolution and settling of magnon condensation in the spin 1 2 dimer system Sr3Cr2O8 using a combination of magnetostriction in pulsed fields and inelastic neutron scattering in a continuous magnetic field. The magnetic structure in the Bose Einstein condensation phase was probed by neutron diffraction in pulsed magnetic fields up to 39 T. The magnetic structure in this phase was confirmed to be an XY antiferromagnetic structure validated by irreducible representational analysis. The magnetic phase diagram as a function of an applied magnetic field for this system is presented. Furthermore, zero field neutron diffraction results indicate that dimerization plays an important role in stabilizing the low temperature crystal structur