Quantum mechanics

Small-angle neutron scattering

Magnetic field

Spin (aerodynamics)

Magnetization

Antiferromagnetism

Materials science

Magnetic structure

Ferromagnetism

Nuclear physics

Magnon

Neutron

Thermodynamics

Physics

Inelastic neutron scattering

Optics

Condensed matter physics

Neutron diffraction

Crystallography

Chemistry

Diffraction

Neutron scattering

Spin structure

Physical review. B./Physical review. B

In this work, we investigate the evolution and settling of magnon condensation in the spin-1/2 dimer system ${\mathrm{Sr}}_{3}{\mathrm{Cr}}_{2}{\mathrm{O}}_{8}$ 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 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 $\mathit{XY}$-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.

Neutron diffraction of field-induced magnon condensation in the spin-dimerized antiferromagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">Sr</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">Cr</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>8</mml:mn></mml:msub></mml:math>

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