Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 70, Issue 4, Pages 939-942Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.70.939
Keywords
TlCuCl3; spin gap; field-induced magnetic ordering; spin structure; neutron elastic scattering; Bose-Einstein condensation of magnons
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Neutron elastic scattering experiments have been performed on the spin gap system TlCuCl3 in magnetic fields parallel to the b-axis. The magnetic Bragg peaks which indicate the field-induced Neel ordering were observed for the magnetic field higher than the gap field H-g approximate to 5.5 T at Q = (h, 0, l) with odd l in the a* - c* plane. The spin structure in the ordered phase was determined. The temperature and field dependence of the Bragg peak intensities and the phase boundary obtained were discussed in connection with a recent theory which describes the field-induced Neel ordering as a Bose-Einstein condensation of magnons.
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