Pressure-Induced Successive Magnetic Phase Transitions in the Spin Gap System TlCuCl$_3$

Details Pressure-Induced Successive Magnetic Phase Transitions in the Spin Gap System TlCuCl$_3$ Pressure-Induced Successive Magnetic Phase Transitions in the Spin Gap System TlCuCl$_3$

2004-04-13

arxiv.org/abs/cond-mat/0404273v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures, jpsj2.cls

Scientific paper

10.1143/JPSJ.73.1446

Under the hydrostatic pressure $P=1.48$ GPa, polarized neutron elastic scattering experiments have been carried out on the coupled spin dimer system TlCuCl$_3$ with the gapped ground state at ambient pressure. Pressure-induced magnetic ordering occurs at the transition temperature $T_{\rm N}=16.9$ K. As in the field-induced and impurity-induced magnetic ordered phases, the ordered moments lie in the $a-c$ plane just below $T_{\rm N}$. An additional spin reorientation (SR) phase transition was observed at $T_{\rm SR}=10$ K, where the ordered moments start to incline toward the b-axis. The temperature variations of the direction and the magnitude of the ordered moments were also investigated.

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