Neutron diffraction of field-induced magnon condensation in the spin-dimerized antiferromagnet Sr3Cr2O8 - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B Année : 2021

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

Résumé

In this work, we investigate the evolution and settling of magnon condensation in the spin-1/2 dimer system Sr3Cr2 8 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 (BEC) 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 structure.
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hal-03350339 , version 1 (21-09-2021)

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Alsu Gazizulina, Diana Lucia Quintero-Castro, Zhe Wang, F. Duc, Frederic Bourdarot, et al.. Neutron diffraction of field-induced magnon condensation in the spin-dimerized antiferromagnet Sr3Cr2O8. Physical Review B, 2021, 104 (6), pp.064430. ⟨10.1103/PhysRevB.104.064430⟩. ⟨hal-03350339⟩
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