Paramagnetic ground state with field-induced partial order in Nd_3Ga_5SiO_{14} probed by low-temperature heat transport
arXiv:1205.3961 · doi:10.1103/PhysRevB.85.174438
Abstract
We study the low-temperature heat transport of Nd_3Ga_5SiO_{14}, which is a spin-liquid candidate, to probe the nature of ground state and the effect of magnetic field on the magnetic properties. The thermal conductivity (κ) shows a purely phononic transport in zero field. The external magnetic field along the c axis induces a dip-like behavior of κ(H), which can be attributed to a simple paramagnetic scattering on phonons. However, the magnetic field along the ab plane induces another step-like decrease of κ. This kind of κ(H) behavior is discussed to be related to a field-induced partial order, which yields low-energy magnetic excitations that significantly scatter phonons. These results point to a paramagnetic ground state that partial magnetic order can be induced by magnetic field along the ab plane, which is also signified by the low-T specific heat data.
6 pages, 6 figures, accepted for publication in Phys. Rev. B
References in corpus (9)
- Spin-Liquid State in the S = 1/2 Hyperkagome Antiferromagnet Na4Ir3O8
- Magnetic phase transitions and magnetoelectric coupling of GdFeO_3 single crystals probed by low-temperature heat transport
- Magnetothermal transport in the spin-1/2 chains of copper pyrazine dinitrate
- Large magnetothermal conductivity of HoMnO_3 single crystals and its relation to the magnetic-field induced transitions of magnetic structure
- Low-Temperature Heat Transport in the Low-Dimensional Quantum Magnet NiCl_{2}-4SC(NH_{2})_{2}
- Spin liquid correlations in Nd-langasite anisotropic Kagomé antiferromagnet
- Easy-Axis Kagomé Antiferromagnet: Local-Probe Study of NdGaSiO
- Hidden magnetic frustration by quantum relaxation in anisotropic Nd-langasite
- Large magnetothermal conductivity in GdBaCo_{2}O_{5+x} single crystals