Low-temperature thermal conductivity of terbium-gallium garnet

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776110110075· OSTI ID:21443350

Taldenkov, A N ^[1]

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1. Kurchatov Institute, Russian Research Centre (Russian Federation)

Thermal conductivity of paramagnetic Tb{sub 3}Ga{sub 5}O{sub 12} (TbGG) terbium-gallium garnet single crystals is investigated at temperatures from 0.4 to 300 K in magnetic fields up to 3.25 T. A minimum is observed in the temperature dependence {kappa}(T) of thermal conductivity at T{sub min} = 0.52 K. This and other singularities on the {kappa}(T) dependence are associated with scattering of phonons from terbium ions. The thermal conductivity at T = 5.1 K strongly depends on the magnetic field direction relative to the crystallographic axes of the crystal. Experimental data are considered using the Debye theory of thermal conductivity taking into account resonance scattering of phonons from Tb{sup 3+} ions. Analysis of the temperature and field dependences of the thermal conductivity indicates the existence of a strong spin-phonon interaction in TbGG. The low-temperature behavior of the thermal conductivity (field and angular dependences) is mainly determined by resonance scattering of phonons at the first quasi-doublet of the electron spectrum of Tb{sup 3+} ion.

• OSTI ID: 21443350
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 111, Issue 5; Other Information: DOI: 10.1134/S1063776110110075; Copyright (c) 2010 Pleiades Publishing, Ltd.; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTAL STRUCTURE
ELECTRON SPECTRA
GALLIUM OXIDES
MAGNETIC FIELDS
MONOCRYSTALS
PARAMAGNETISM
PHONONS
RESCATTERING
RESONANCE SCATTERING
SPIN
TEMPERATURE DEPENDENCE
TERBIUM COMPOUNDS
TERBIUM IONS
THERMAL CONDUCTIVITY
ANGULAR MOMENTUM
CHALCOGENIDES
CHARGED PARTICLES
CRYSTALS
GALLIUM COMPOUNDS
INELASTIC SCATTERING
IONS
MAGNETISM
OXIDES
OXYGEN COMPOUNDS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
QUASI PARTICLES
RARE EARTH COMPOUNDS
SCATTERING
SPECTRA
THERMODYNAMIC PROPERTIES